subject:(diesel combustion)

Texas A&M University

1. Breen, Jonathan Robert. Development of Low Temperature Combustion Modes to Reduce Overall Emissions from a Medium-Duty, Four Cylinder Diesel Engine.

Degree: MS, Mechanical Engineering, 2011, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8250

► Low temperature combustion (LTC) is an appealing new method of combustion that promises low nitric oxides and soot emissions while maintaining or improving on engine… (more)

▼ Low temperature combustion (LTC) is an appealing new method of combustion that promises low nitric oxides and soot emissions while maintaining or improving on engine performance. The three main points of this study were to develop and validate an engine model in GT-Power capable of implementing LTC, to study parametrically exhaust gas recirculation (EGR) and injection timing effects on performance and emissions, and to investigate methods to decrease pressure rise rates during LTC operation. The model was validated at nine different operating points, 3 speeds and 3 loads, while the parametric studies were conducted on 6 of the 9 operating points, 3 speeds and 2 loads. The model consists of sections that include: cylinders, ports, intake and exhaust manifolds, EGR system, and turbocharger. For this model, GT-Power calculates the combustion using a multi-zone, quasi-dimensional model and a knock-induced combustion model. The main difference between them is that the multi-zone model is directly injected while the knock model is port injected. A variety of sub models calculate the fluid flow and heat transfer. A parametric study varying the EGR and the injection timing to determine the optimal combination was conducted using the multi-zone model while a parametric study that just varies EGR is carried out using the knock model. The first parametric study showed that the optimal EGR and injection timing combination for the low loads occurred at high levels of EGR (60 percent) and advanced injection timings (30 to 40 crank angle degrees before top dead center). The optimal EGR and injection timing combination for the high loads occurred at low levels of EGR (30 percent to 40 percent) and retarded injection timings (7.5 to 5 crank angle degrees before top dead center). The knock model determined that the ideal EGR ratio for homogeneous charge compression ignition (HCCI) operation varied from 30 percent to 45 percent, depending on the operating condition. Three methods were investigated as possible ways to reduce pressure rise rates during LTC operation. The only feasible method was the multiple injection strategy which provided dramatically reduced pressure rise rates across all EGR levels and injection timings. Advisors/Committee Members: Caton, Jerald A. (advisor), Jacobs, Timothy J. (committee member), Capareda, Sergio (committee member).

Subjects/Keywords: Low Temperature Combustion; Diesel Combustion; Diesel Engines; HCCI; Diesel Emissions

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Breen, J. R. (2011). Development of Low Temperature Combustion Modes to Reduce Overall Emissions from a Medium-Duty, Four Cylinder Diesel Engine. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8250

Chicago Manual of Style (16^th Edition):

Breen, Jonathan Robert. “Development of Low Temperature Combustion Modes to Reduce Overall Emissions from a Medium-Duty, Four Cylinder Diesel Engine.” 2011. Masters Thesis, Texas A&M University. Accessed April 14, 2021. http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8250.

MLA Handbook (7^th Edition):

Breen, Jonathan Robert. “Development of Low Temperature Combustion Modes to Reduce Overall Emissions from a Medium-Duty, Four Cylinder Diesel Engine.” 2011. Web. 14 Apr 2021.

Vancouver:

Breen JR. Development of Low Temperature Combustion Modes to Reduce Overall Emissions from a Medium-Duty, Four Cylinder Diesel Engine. [Internet] [Masters thesis]. Texas A&M University; 2011. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8250.

Council of Science Editors:

Breen JR. Development of Low Temperature Combustion Modes to Reduce Overall Emissions from a Medium-Duty, Four Cylinder Diesel Engine. [Masters Thesis]. Texas A&M University; 2011. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8250

University of Pretoria

2. [No author]. Investigation into a system that can detect improper combustion in a diesel engine before significant damage can occur .

Degree: 2009, University of Pretoria

URL: http://upetd.up.ac.za/thesis/available/etd-11262009-210133/

► An alarming number of compression ignition (CI) engines in the transport, mining and heavy engineering environments have been failing due to combustion irregularities within their… (more)

▼ An alarming number of compression ignition (CI) engines in the transport, mining and heavy engineering environments have been failing due to combustion irregularities within their combustion chambers. It has been found that diesel fuels containing contaminants or diesel fuels with poor lubricity characteristics lead to stickiness of diesel injector needles, which badly affects injector spray patterns resulting in the phenomenon of “cold combustion”. This study has been undertaken to develop a technique for detecting and preventing the damage resulting from this deviation in the combustion of a diesel engine. The technique has been formulated with a view to being as non intrusive as possible, so as not to require major modification of an existing test engine to accommodate the technique. The practice of monitoring individual cylinder exhaust gas temperatures (EGTs) proved to be an effective way of determining whether potentially destructive combustion abnormalities were taking place within the diesel engine. By recording these temperatures at certain stages during the engine’s operation, taking their average, and comparing each one to this average it is also possible to isolate the location of the combustion abnormality. This method proved to be most effective at full loads and maximum fuel delivery where combustion temperatures are highest and the effects of poor combustion are most noticeable and potentially damaging. The second goal was to develop a small, portable electronic device that makes use of the monitoring technique developed and provides a visual and audible alarm to notify a vehicle operator or technician of a combustion fault within a diesel engine. A Combustion Monitoring System (CMS) prototype was developed and tested on a small naturally aspirated engine at the University of Pretoria’s engine testing facilities. The prototype met its primary goal of detecting simulated combustion abnormalities under a variety of test conditions. It is envisaged that the monitoring techniques applied in developing the CMS unit may eventually be incorporated into the powerful processing abilities of the modern diesel Engine Control Unit (ECU). In its current form the CMS prototype is a useful tool in sensing combustion related malfunctions within a diesel engine and preventing damage from occurring. Advisors/Committee Members: Prof N D L Burger (advisor), Prof A von Wielligh (advisor).

Subjects/Keywords: Improper combustion; Diesel engines; UCTD

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

author], [. (2009). Investigation into a system that can detect improper combustion in a diesel engine before significant damage can occur . (Masters Thesis). University of Pretoria. Retrieved from http://upetd.up.ac.za/thesis/available/etd-11262009-210133/

Chicago Manual of Style (16^th Edition):

author], [No. “Investigation into a system that can detect improper combustion in a diesel engine before significant damage can occur .” 2009. Masters Thesis, University of Pretoria. Accessed April 14, 2021. http://upetd.up.ac.za/thesis/available/etd-11262009-210133/.

MLA Handbook (7^th Edition):

author], [No. “Investigation into a system that can detect improper combustion in a diesel engine before significant damage can occur .” 2009. Web. 14 Apr 2021.

Vancouver:

author] [. Investigation into a system that can detect improper combustion in a diesel engine before significant damage can occur . [Internet] [Masters thesis]. University of Pretoria; 2009. [cited 2021 Apr 14]. Available from: http://upetd.up.ac.za/thesis/available/etd-11262009-210133/.

Council of Science Editors:

author] [. Investigation into a system that can detect improper combustion in a diesel engine before significant damage can occur . [Masters Thesis]. University of Pretoria; 2009. Available from: http://upetd.up.ac.za/thesis/available/etd-11262009-210133/

3. Azmeera, Aruna Kumari. Combustion and emission characteristics of di diesel engines using bio diesel; -.

Degree: Mechanical, 2013, Jawaharlal Nehru Technological University, Hyderabad

URL: http://shodhganga.inflibnet.ac.in/handle/10603/16389

►

Now a days for any country energy resourses in particular petroleum products have become important for its development. The products derived from crude oil continued… (more)

Subjects/Keywords: Characteristics; Combustion; Diesel; Emission; Engines

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Azmeera, A. K. (2013). Combustion and emission characteristics of di diesel engines using bio diesel; -. (Thesis). Jawaharlal Nehru Technological University, Hyderabad. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/16389

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Azmeera, Aruna Kumari. “Combustion and emission characteristics of di diesel engines using bio diesel; -.” 2013. Thesis, Jawaharlal Nehru Technological University, Hyderabad. Accessed April 14, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/16389.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Azmeera, Aruna Kumari. “Combustion and emission characteristics of di diesel engines using bio diesel; -.” 2013. Web. 14 Apr 2021.

Vancouver:

Azmeera AK. Combustion and emission characteristics of di diesel engines using bio diesel; -. [Internet] [Thesis]. Jawaharlal Nehru Technological University, Hyderabad; 2013. [cited 2021 Apr 14]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/16389.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Azmeera AK. Combustion and emission characteristics of di diesel engines using bio diesel; -. [Thesis]. Jawaharlal Nehru Technological University, Hyderabad; 2013. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/16389

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

4. Periyasamy S. Investigation of combustion chamber profile induced thermal performance and vibration in diesel engine;.

Degree: Combustion chamber profile induced thermal performance and vibration in Diesel engine, 2014, Anna University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/17400

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The function of an engine is to produce mechanical power. When newlinethe fuel is burnt, heat is released. This heat energy is converted into useful… (more)

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The function of an engine is to produce mechanical power. When newlinethe fuel is burnt, heat is released. This heat energy is converted into useful newlinework. The details of the engine design are varying significantly over the size newlineof diesel engine. In particular, different combustion chamber geometries and newlinefuel-injection characteristics are required to deal effectively with a major newlinediesel engine design problem, achieving sufficiently rapid fuel-air mixing newlinerates to complete the fuel-burning process in the time available. A wide newlinevariety of inlet port geometries, cylinder head and piston shapes, and fuelinjection newlinepatterns are used to accomplish this over the size of diesel engine. newlineCombustion chamber profile changes are considered technologically newlineimportant because of their ability to further increase in diesel engine working temperatures and reduce cooling requirements, thus achieving higher engine newlineefficiency, lower emission and increased performance. newlineThe vibration of engine also depends on the combustion newlinephenomena and then the piston profile. The force acting on piston is varying newlinedepends on the piston profile area for the same pressure inside the cylinder. newlineBy this way combustion chamber profile otherwise the piston crown profile is newlinevery important to get a favourable performance in terms of thermal and newlinevibration aspects. The combination of thermal performance, simulation of incylinder newlineflow and vibration data are not available for use. A new design newlineapproach adapted for compromising the thermal performance and vibration behaviour of the engine. Four different piston profiles were selected newlinefor the experimental work as well as the simulation work. All pistons were newlinefitted in engine and the performance parameters along with emission newlineparameter were recorded. The specific fuel consumption, thermal efficiency, newlinemechanical efficiency and NOx were obtained from the experiment. At the newlinesame time the vibration signal was collected and stored in the computer. newline

Appendix p.153-154, References p.155-174.

Advisors/Committee Members: Alwarsamy T.

Subjects/Keywords: Combustion chamber; Diesel engine; Vibration

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APA (6^th Edition):

S, P. (2014). Investigation of combustion chamber profile induced thermal performance and vibration in diesel engine;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/17400

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

S, Periyasamy. “Investigation of combustion chamber profile induced thermal performance and vibration in diesel engine;.” 2014. Thesis, Anna University. Accessed April 14, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/17400.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

S, Periyasamy. “Investigation of combustion chamber profile induced thermal performance and vibration in diesel engine;.” 2014. Web. 14 Apr 2021.

Vancouver:

S P. Investigation of combustion chamber profile induced thermal performance and vibration in diesel engine;. [Internet] [Thesis]. Anna University; 2014. [cited 2021 Apr 14]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/17400.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

S P. Investigation of combustion chamber profile induced thermal performance and vibration in diesel engine;. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/17400

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

5. Appa Rao K. Experimental investigation for adopting hcci combustion in a diesel engine.

Degree: Mechanical Engineering, 2013, Jawaharlal Nehru Technological University, Anantapuram

URL: http://shodhganga.inflibnet.ac.in/handle/10603/9763

►

At present diesel engines are performing well and meeting existing emission norms. But to meet future emission norms alternative combustion concept may be useful. Homogeneous… (more)

▼

At present diesel engines are performing well and meeting existing emission norms. But to meet future emission norms alternative combustion concept may be useful. Homogeneous Charge Compression Ignition (HCCI) has proven to be capable of reducing both Oxides of Nitrogen (NOx) and Smoke emissions significantly. In HCCI engine, a homogeneous air fuel mixture is formed in the combustion chamber and the mixture is compression ignited. Due to the fact that the mixture is homogeneous, there is no smoke producing fuel-rich regions. The NOx emissions are also low because HCCI engine runs with lean homogeneous mixture and at low in-cylinder temperature. The objective of present work is for adopting HCCI combustion in a diesel engine by addressing the problems associated with HCCI engine like (i) rapid pressure rise due to instantaneous combustion (ii) difficulty to operate at higher loads due to knocking (iii) increase of HC and CO emissions (iv) decrease in brake thermal efficiency. At high loads, rate of pressure rise is rapid in the combustion chamber. Because of this, it is inevitable to sacrifice to run the engine at high loads with HCCI concept. Also CO and HC emissions for HCCI engine were reported to be increased, which requires a remedy. The another important problem is loss in brake thermal efficiency with HCCI combustion. Hence, there is a need to focus attention to overcome these problems in order to make HCCI engine practicable. Keeping these things in mind, experimental investigation is planned in the present research work to find remedies to the above problems. For this purpose, a computerized single cylinder, four stroke, water cooled, variable compression ratio, diesel engine is selected with specifications shown in Appendix-I. The performance, emission and combustion parameters of base engine diesel are recorded at standard operating conditions such as compression ratio 16.5, injection timing 230 bTDC and injection pressure 200 bar and these readings are taken as base data.

Summary and Conclusion p. 200-207, References p. 208-226, Appendix p. 227-235

Advisors/Committee Members: Raja Gopal K.

Subjects/Keywords: Adopting HCCI; Combustion; Diesel Engine

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APA (6^th Edition):

K, A. R. (2013). Experimental investigation for adopting hcci combustion in a diesel engine. (Thesis). Jawaharlal Nehru Technological University, Anantapuram. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/9763

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

K, Appa Rao. “Experimental investigation for adopting hcci combustion in a diesel engine.” 2013. Thesis, Jawaharlal Nehru Technological University, Anantapuram. Accessed April 14, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/9763.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

K, Appa Rao. “Experimental investigation for adopting hcci combustion in a diesel engine.” 2013. Web. 14 Apr 2021.

Vancouver:

K AR. Experimental investigation for adopting hcci combustion in a diesel engine. [Internet] [Thesis]. Jawaharlal Nehru Technological University, Anantapuram; 2013. [cited 2021 Apr 14]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/9763.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

K AR. Experimental investigation for adopting hcci combustion in a diesel engine. [Thesis]. Jawaharlal Nehru Technological University, Anantapuram; 2013. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/9763

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

6. Bandura, Ryan Alexander. Simple Zero Dimensional Quasi-predictive Thermodynamic Simulation for Prediction of NOx for Diesel Combustion.

Degree: MS, Mechanical Engineering, 2017, Texas A&M University

URL: http://hdl.handle.net/1969.1/161590

► Computational fluid dynamics (CFD) is now a ubiquitous computational tool for engine design and analysis. It is often necessary to provide well-known initial cycle conditions… (more)

Subjects/Keywords: Diesel; combustion; NOx; CFD; Simulation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Bandura, R. A. (2017). Simple Zero Dimensional Quasi-predictive Thermodynamic Simulation for Prediction of NOx for Diesel Combustion. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/161590

Chicago Manual of Style (16^th Edition):

Bandura, Ryan Alexander. “Simple Zero Dimensional Quasi-predictive Thermodynamic Simulation for Prediction of NOx for Diesel Combustion.” 2017. Masters Thesis, Texas A&M University. Accessed April 14, 2021. http://hdl.handle.net/1969.1/161590.

MLA Handbook (7^th Edition):

Bandura, Ryan Alexander. “Simple Zero Dimensional Quasi-predictive Thermodynamic Simulation for Prediction of NOx for Diesel Combustion.” 2017. Web. 14 Apr 2021.

Vancouver:

Bandura RA. Simple Zero Dimensional Quasi-predictive Thermodynamic Simulation for Prediction of NOx for Diesel Combustion. [Internet] [Masters thesis]. Texas A&M University; 2017. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/1969.1/161590.

Council of Science Editors:

Bandura RA. Simple Zero Dimensional Quasi-predictive Thermodynamic Simulation for Prediction of NOx for Diesel Combustion. [Masters Thesis]. Texas A&M University; 2017. Available from: http://hdl.handle.net/1969.1/161590

University of Pretoria

7. Wilcocks, Theo Lawrence. Investigation into a system that can detect improper combustion in a diesel engine before significant damage can occur.

Degree: Mechanical and Aeronautical Engineering, 2009, University of Pretoria

URL: http://hdl.handle.net/2263/29841

► An alarming number of compression ignition (CI) engines in the transport, mining and heavy engineering environments have been failing due to combustion irregularities within their… (more)

▼ An alarming number of compression ignition (CI) engines in the transport, mining and heavy engineering environments have been failing due to combustion irregularities within their combustion chambers. It has been found that diesel fuels containing contaminants or diesel fuels with poor lubricity characteristics lead to stickiness of diesel injector needles, which badly affects injector spray patterns resulting in the phenomenon of “cold combustion”. This study has been undertaken to develop a technique for detecting and preventing the damage resulting from this deviation in the combustion of a diesel engine. The technique has been formulated with a view to being as non intrusive as possible, so as not to require major modification of an existing test engine to accommodate the technique. The practice of monitoring individual cylinder exhaust gas temperatures (EGTs) proved to be an effective way of determining whether potentially destructive combustion abnormalities were taking place within the diesel engine. By recording these temperatures at certain stages during the engine’s operation, taking their average, and comparing each one to this average it is also possible to isolate the location of the combustion abnormality. This method proved to be most effective at full loads and maximum fuel delivery where combustion temperatures are highest and the effects of poor combustion are most noticeable and potentially damaging. The second goal was to develop a small, portable electronic device that makes use of the monitoring technique developed and provides a visual and audible alarm to notify a vehicle operator or technician of a combustion fault within a diesel engine. A Combustion Monitoring System (CMS) prototype was developed and tested on a small naturally aspirated engine at the University of Pretoria’s engine testing facilities. The prototype met its primary goal of detecting simulated combustion abnormalities under a variety of test conditions. It is envisaged that the monitoring techniques applied in developing the CMS unit may eventually be incorporated into the powerful processing abilities of the modern diesel Engine Control Unit (ECU). In its current form the CMS prototype is a useful tool in sensing combustion related malfunctions within a diesel engine and preventing damage from occurring. Advisors/Committee Members: Prof N D L Burger (advisor), Prof A von Wielligh (advisor).

Subjects/Keywords: Improper combustion; Diesel engines; UCTD

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Wilcocks, T. (2009). Investigation into a system that can detect improper combustion in a diesel engine before significant damage can occur. (Masters Thesis). University of Pretoria. Retrieved from http://hdl.handle.net/2263/29841

Chicago Manual of Style (16^th Edition):

Wilcocks, Theo. “Investigation into a system that can detect improper combustion in a diesel engine before significant damage can occur.” 2009. Masters Thesis, University of Pretoria. Accessed April 14, 2021. http://hdl.handle.net/2263/29841.

MLA Handbook (7^th Edition):

Wilcocks, Theo. “Investigation into a system that can detect improper combustion in a diesel engine before significant damage can occur.” 2009. Web. 14 Apr 2021.

Vancouver:

Wilcocks T. Investigation into a system that can detect improper combustion in a diesel engine before significant damage can occur. [Internet] [Masters thesis]. University of Pretoria; 2009. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/2263/29841.

Council of Science Editors:

Wilcocks T. Investigation into a system that can detect improper combustion in a diesel engine before significant damage can occur. [Masters Thesis]. University of Pretoria; 2009. Available from: http://hdl.handle.net/2263/29841

Universitat Politècnica de València

8. Monelletta, Luca. Contribution to the study of combustion noise of automotive Diesel engines .

Degree: 2011, Universitat Politècnica de València

URL: http://hdl.handle.net/10251/10954

► Despite their important advantages in terms of fuel consumption in comparison with gasoline engines, for a long time the characteristic impulsive combustion noise has been… (more)

▼ Despite their important advantages in terms of fuel consumption in comparison with gasoline engines, for a long time the characteristic impulsive combustion noise has been one of the main causes why customers are reluctant to buy cars equipped with Diesel engines. This is the main reason for the efforts devoted by car manufacturers to mitigate Diesel engine noise while improving performance and driveability. In spite of all technical improvements, vehicles equipped with High Speed Direct Injection (HSDI) engines still offer a comfort level inferior to gasoline engine vehicles. Noise represents one of the most important aspects in the definition of comfort, and especially combustion noise plays an essential role in the acoustic of a vehicle as, in the case of DI engines, it represents one of the most important noise sources. Thus, the great potential of diesel engines for environment preservation – due to their lower CO2 emissions – could be missed. This situation worsens with the current design trends (engine downsizing) and the emerging new diesel combustion concepts (Homogeneous Charge Compression Ignition-HCCI, Premixed Charge Compression Ignition-PCCI, etc.) conceived to further reduce NOx and particulate matter to comply with forthcoming legislation, which are intrinsically noisy. Therefore, combustion noise must be considered as an additional essential factor in engine development, together with performance, emissions and driveability. Thus, suitable evaluation procedures that can be integrated into the global engine development process in a timely and cost-effective manner are imperative, both for noise level and sound quality. In this thesis, a procedure, based on the consideration of suitable indicators extracted from in-cylinder pressure, is proposed and validated. Such indicators are obtained from an innovative procedure to decompose in-cylinder pressure signal, so that features associated with combustion and with resonance excitation may be properly identified. Advisors/Committee Members: Broatch Jacobi, Jaime Alberto (advisor).

Subjects/Keywords: Combustion; Noise; Diesel; Quality; Level

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Monelletta, L. (2011). Contribution to the study of combustion noise of automotive Diesel engines . (Doctoral Dissertation). Universitat Politècnica de València. Retrieved from http://hdl.handle.net/10251/10954

Chicago Manual of Style (16^th Edition):

Monelletta, Luca. “Contribution to the study of combustion noise of automotive Diesel engines .” 2011. Doctoral Dissertation, Universitat Politècnica de València. Accessed April 14, 2021. http://hdl.handle.net/10251/10954.

MLA Handbook (7^th Edition):

Monelletta, Luca. “Contribution to the study of combustion noise of automotive Diesel engines .” 2011. Web. 14 Apr 2021.

Vancouver:

Monelletta L. Contribution to the study of combustion noise of automotive Diesel engines . [Internet] [Doctoral dissertation]. Universitat Politècnica de València; 2011. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/10251/10954.

Council of Science Editors:

Monelletta L. Contribution to the study of combustion noise of automotive Diesel engines . [Doctoral Dissertation]. Universitat Politècnica de València; 2011. Available from: http://hdl.handle.net/10251/10954

9. Aubagnac-Karkar, Damien. Sectional soot modeling for Diesel RANS simulations : Modélisation des suies par méthode sectionnelle pour la simulation RANS des moteurs Diesel.

Degree: Docteur es, Énergétique, 2014, Châtenay-Malabry, Ecole centrale de Paris

URL: http://www.theses.fr/2014ECAP0061

►

Les particules de suies issues de moteur Diesel constituent un enjeu de santé publique et sont soumises à des réglementations de plus en plus strictes.… (more)

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Les particules de suies issues de moteur Diesel constituent un enjeu de santé publique et sont soumises à des réglementations de plus en plus strictes. Les constructeurs automobiles ont donc besoin de modèles capables de prédire l’évolution en nombre et en taille de ces particules de suies. Dans ce cadre, un modèle de suies basé sur une représentation sectionnelle de la phase solide est proposé dans cette thèse. Le choix de ce type d’approche est d’abord justifié par l’étude de l’état de l’art de la modélisation des suies. Le modèle de suies proposé est ensuite décrit. A chaque instant et en chaque point du maillage, les particules de suies sont réparties en sections selon leur taille et l’évolution de chaque section est gouvernée par : • une équation de transport;• des termes sources modélisant l’interaction avec la phase gazeuse (nucléation, condensation, croissance de surface et oxydation des suies);• des termes sources collisionnels permettant de représenter les interactions entre suies (condensation et coagulation). Ce modèle de suies nécessite donc la connaissance des concentrations locales et instantanées des précurseurs de suies et des espèces consommées par les schémas de réactions de surface des suies. Les schémas fournissant ces informations pour des conditions thermodynamiques rencontrées dans des moteurs Diesel comportant des centaines d’espèces et des milliers de réactions, ils ne peuvent être utilisés directement dans des calculs de CFD. Pour pallier cela, l’approche de tabulation de la chimie VPTHC (Variable Pressure Tabulated Homogeneous Chemistry) a été proposée. Cette approche est basée sur l’approche ADF (Approximated Diffusion Flame) qui a été simplifiée pour permettre son emploi couplé au modèle de suies sectionnel. Dans un premier temps, la capacité du modèle tabulé à reproduire la cinétique chimique a été validée par comparaison des résultats obtenus avec ceux de réacteurs homogènes avec loi de piston équivalents. Finalement, le modèle VPTHC, couplé au modèle de suies sectionnel, a été validé sur une base d’essais moteur dédiée avec des mesures de distribution en taille de suies à l’échappement. Cette base comporte des variations de durée d’injection, de pression d’injection et de taux d’EGR à la fois pour un carburant Diesel commercial et pour le carburant modèle utilisé dans les calculs. Les prédictions des débits horaires de suies et des distributions à l’échappement obtenues sont en bon accord avec les mesures.Ensuite, les résultats du modèle ont été comparés avec les mesures plus académiques et détaillées du Spray A de l’Engine Combustion Network, un spray à haute pression et température. Cette seconde validation expérimentale a permis l’étude du comportement du modèle dans des régimes transitoires.

Soot particles emitted by Diesel engines cause major public health issues. Car manufacturers need models able to predict soot number and size distribution to face the more and more stringent norms.In this context, a soot model based on a sectional description of the solid phase is proposed…

Advisors/Committee Members: Darabiha, Nasser (thesis director).

Subjects/Keywords: Suies; Combustion; Polluants; Diesel; Soot; Combustion; Pollutant; Diesel

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Aubagnac-Karkar, D. (2014). Sectional soot modeling for Diesel RANS simulations : Modélisation des suies par méthode sectionnelle pour la simulation RANS des moteurs Diesel. (Doctoral Dissertation). Châtenay-Malabry, Ecole centrale de Paris. Retrieved from http://www.theses.fr/2014ECAP0061

Chicago Manual of Style (16^th Edition):

Aubagnac-Karkar, Damien. “Sectional soot modeling for Diesel RANS simulations : Modélisation des suies par méthode sectionnelle pour la simulation RANS des moteurs Diesel.” 2014. Doctoral Dissertation, Châtenay-Malabry, Ecole centrale de Paris. Accessed April 14, 2021. http://www.theses.fr/2014ECAP0061.

MLA Handbook (7^th Edition):

Aubagnac-Karkar, Damien. “Sectional soot modeling for Diesel RANS simulations : Modélisation des suies par méthode sectionnelle pour la simulation RANS des moteurs Diesel.” 2014. Web. 14 Apr 2021.

Vancouver:

Aubagnac-Karkar D. Sectional soot modeling for Diesel RANS simulations : Modélisation des suies par méthode sectionnelle pour la simulation RANS des moteurs Diesel. [Internet] [Doctoral dissertation]. Châtenay-Malabry, Ecole centrale de Paris; 2014. [cited 2021 Apr 14]. Available from: http://www.theses.fr/2014ECAP0061.

Council of Science Editors:

Aubagnac-Karkar D. Sectional soot modeling for Diesel RANS simulations : Modélisation des suies par méthode sectionnelle pour la simulation RANS des moteurs Diesel. [Doctoral Dissertation]. Châtenay-Malabry, Ecole centrale de Paris; 2014. Available from: http://www.theses.fr/2014ECAP0061

Universitat Politècnica de València

10. Redón Lurbe, Pau. Modeling of the nitrogen oxides formation process applicable to several diesel combustion modes .

Degree: 2013, Universitat Politècnica de València

URL: http://hdl.handle.net/10251/33183

► Como consecuencia de las exigentes legislaciones medioambientales actualmente en vigor, como las Euro Emission Standards en Europa, los investigadores e ingenieros se ven forzados a… (more)

▼ Como consecuencia de las exigentes legislaciones medioambientales actualmente en vigor, como las Euro Emission Standards en Europa, los investigadores e ingenieros se ven forzados a "re-desarrollar" el proceso de combustión diésel para hacerlo menos contaminante. Uno de los principales contaminantes y más dañinos para la salud son los óxidos de nitrógeno (NOx) que están principalmente compuestos por: monóxido de nitrógeno (NO), dióxido de nitrógeno (NO2) y trióxido de dinitrógeno (N2O3). Centrándose en los NOx generados en una combustión diésel, una de las técnicas más populares para mitigar su formación es mediante la dilución de la corriente oxidante con productos de la combustión, previamente generados. De este modo, al reducir la reactividad de la corriente oxidante se consigue una disminución considerable de la temperatura de combustión y por extensión de los NOx. Sin embargo, dicha técnica causa nuevas interacciones físico-químicas entre los hidrocarburos y los NOx así como principalmente un notable cambio en la estructura del chorro diésel. Es por ello necesario considerar las diferentes vías de formación de éstos para poder predecir su generación. El hecho de considerar las diferentes vías de formación implica un incremento considerable de los recursos computacionales destinados a realizar las simulaciones, siendo en algunos casos inviable. Es por ello que el objetivo principal de esta tesis consiste en: desarrollar herramientas capaces de tener en consideración todas estas vías sin incrementar de manera considerable el coste computacional. Para ello inicialmente se realiza una exhaustiva revisión bibliográfica en donde se repasan las diferentes herramientas desarrolladas para la predicción de los NOx y se analizan sus puntos débiles. Éstos radican en simplificaciones de dudosa validez, que solamente tienen efectos positivos a altas y no a bajas temperaturas, o bien procesos demasiado tediosos y complejos para caracterizar los diferentes estados de una combustión. Posteriormente se diseña una metodología capaz de satisfacer el objetivo principal, basada en tres estudios. El primero permite profundizar en el proceso de formación de este contaminante a través de estudiar el incremento de la proporción de NO2 en los NOx debido a la recirculación masiva de estos productos. Por otro lado, los otros dos consisten en desarrollar diversas herramientas predictivas centradas exclusivamente en el NO, ya que como se dedujo del estudio anterior el NO2 se forma principalmente a partir del NO a través de un proceso de enfriamiento. La primera de estas herramientas está basada en una correlación empírica que a modo de ecuación correctiva mejora la capacidad predictiva, especialmente en condiciones de recirculación masiva, del mecanismo más implementado mundialmente, mientras que la segunda se sustenta en tabular únicamente la velocidad de formación del NO y el NO en equilibrio en función de la temperatura y de la cantidad de oxígeno disponible inicialmente para reaccionar. Finalmente para poder llevar a cabo estos… Advisors/Committee Members: López Sánchez, José Javier (advisor).

Subjects/Keywords: Nitrogen oxides; Low temperature diesel combustion; Conventional diesel combustion; Combustion modelling; Chemical kinetics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Redón Lurbe, P. (2013). Modeling of the nitrogen oxides formation process applicable to several diesel combustion modes . (Doctoral Dissertation). Universitat Politècnica de València. Retrieved from http://hdl.handle.net/10251/33183

Chicago Manual of Style (16^th Edition):

Redón Lurbe, Pau. “Modeling of the nitrogen oxides formation process applicable to several diesel combustion modes .” 2013. Doctoral Dissertation, Universitat Politècnica de València. Accessed April 14, 2021. http://hdl.handle.net/10251/33183.

MLA Handbook (7^th Edition):

Redón Lurbe, Pau. “Modeling of the nitrogen oxides formation process applicable to several diesel combustion modes .” 2013. Web. 14 Apr 2021.

Vancouver:

Redón Lurbe P. Modeling of the nitrogen oxides formation process applicable to several diesel combustion modes . [Internet] [Doctoral dissertation]. Universitat Politècnica de València; 2013. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/10251/33183.

Council of Science Editors:

Redón Lurbe P. Modeling of the nitrogen oxides formation process applicable to several diesel combustion modes . [Doctoral Dissertation]. Universitat Politècnica de València; 2013. Available from: http://hdl.handle.net/10251/33183

11. Kersting, Lee. Characterizing the Operation of a Dual-Fuel Diesel-Hydrogen Engine near the Knock Limit.

Degree: 2014, North Dakota State University

URL: http://hdl.handle.net/10365/27572

► A CAT C6.6 turbocharged diesel engine was operated in dual-fuel diesel-hydrogen mode. Hydrogen was inducted into the intake and replaced a portion of the diesel… (more)

Subjects/Keywords: Combustion; Diesel motor exhaust gas; Hydrogen

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kersting, L. (2014). Characterizing the Operation of a Dual-Fuel Diesel-Hydrogen Engine near the Knock Limit. (Thesis). North Dakota State University. Retrieved from http://hdl.handle.net/10365/27572

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kersting, Lee. “Characterizing the Operation of a Dual-Fuel Diesel-Hydrogen Engine near the Knock Limit.” 2014. Thesis, North Dakota State University. Accessed April 14, 2021. http://hdl.handle.net/10365/27572.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kersting, Lee. “Characterizing the Operation of a Dual-Fuel Diesel-Hydrogen Engine near the Knock Limit.” 2014. Web. 14 Apr 2021.

Vancouver:

Kersting L. Characterizing the Operation of a Dual-Fuel Diesel-Hydrogen Engine near the Knock Limit. [Internet] [Thesis]. North Dakota State University; 2014. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/10365/27572.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kersting L. Characterizing the Operation of a Dual-Fuel Diesel-Hydrogen Engine near the Knock Limit. [Thesis]. North Dakota State University; 2014. Available from: http://hdl.handle.net/10365/27572

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universitat Politècnica de València

12. Xuan, Tiemin. Optical investigations on Diesel spray dynamics and in-flame soot formation .

Degree: 2018, Universitat Politècnica de València

URL: http://hdl.handle.net/10251/94626

► En las últimas décadas ha avanzado mucho la comprensión científica sobre el proceso de combustión de los chorros diesel de inyección directa gracias al desarrollo… (more)

▼ En las últimas décadas ha avanzado mucho la comprensión científica sobre el proceso de combustión de los chorros diesel de inyección directa gracias al desarrollo de todo tipo de técnicas e instalaciones ópticas. Además, se han desarrollado y mejorado una gran cantidad de modelos de Dinámica de Fluidos Computacional (CFD), los cuales se usan para el desarrollo de motores altamente eficientes y con bajas emisiones. Sin embargo, debido a la complejidad de los procesos físicos y químicos involucrados en este proceso de combustión, así como a las limitaciones significativas de los experimentos, aún hay muchas cuestiones sin responder: ¿Cómo afecta la combustión a la dinámica del chorro? ¿Cómo cuantificar de forma efectiva la cantidad de hollín y la temperatura del mismo en la llama? ¿Cómo afecta el flujo del aire y las inyecciones partidas al desarrollo del chorro y a la formación de hollín en condiciones no quiescente? Para ayudar a resolver las preguntas planteadas, el objetivo de este trabajo se pone en investigar al dinámica del chorro y la formación de hollín de los chorros Diesel de inyección directa en condiciones quiescentes y no quiescentes por medio de diferentes técnicas ópticas. El trabajo se ha dividido en dos bloques principales. El primero está centrado en el estudio de las modificaciones inducidas por la combustión en la dinámica del chorro, así como la caracterización de la formación de hollín en la llama, todo ello en condiciones quiescentes. Dichas condiciones son proporcionadas por una maqueta de flujo continuo a alta presión y temperatura. La expansión radial y axial del chorro reactivo se ha investigado usando n-dodecano, n-heptano y una mezcla binaria de combustibles primarios de referencia (80% n-heptano y 20% iso-octano en masa), basándose en una base de datos existente medida mediante visualización de schlieren. Se ha estudiado tanto el papel de las condiciones de operación como las propiedades del combustible. A continuación se ha desarrollado por primera vez una técnica combinada de extinción-radiación, aplicada a la medida de hollín en llamas diesel. Gracias a esta técnica, tanto la fracción volumétrica de hollín como la temperatura se obtuvieron simultáneamente considerando los efectos de la autoabsorción en la radiación. Todo este trabajo se ha desarrollado dentro del marco de actividades de la Engine Combustion Network (ECN). El segundo bloque corresponde a la caracterización de la dinámica del chorro y de la formación de hollín en condiciones no quiescentes, que ocurren en la cámara de combustión de un motor monocilíndrico de dos tiempos con accesos ópticos. En esta parte, se ha llevado a cabo en primer lugar la visualización del chorro para una inyección única en condiciones no-reactivas y reactivas. Se han aplicado la visualización simultánea de schlieren y de la quimioluminiscencia del radical OH* para obtener la penetración del chorro y la longitud de despegue de la llama, mientras que la visualización de la extinción de ombroscopía difusa (DBI) se ha aplicado para cuantificar la… Advisors/Committee Members: García Oliver, José María (advisor).

Subjects/Keywords: Optical investigation; Diesel spray; Combustion; Soot

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Xuan, T. (2018). Optical investigations on Diesel spray dynamics and in-flame soot formation . (Doctoral Dissertation). Universitat Politècnica de València. Retrieved from http://hdl.handle.net/10251/94626

Chicago Manual of Style (16^th Edition):

Xuan, Tiemin. “Optical investigations on Diesel spray dynamics and in-flame soot formation .” 2018. Doctoral Dissertation, Universitat Politècnica de València. Accessed April 14, 2021. http://hdl.handle.net/10251/94626.

MLA Handbook (7^th Edition):

Xuan, Tiemin. “Optical investigations on Diesel spray dynamics and in-flame soot formation .” 2018. Web. 14 Apr 2021.

Vancouver:

Xuan T. Optical investigations on Diesel spray dynamics and in-flame soot formation . [Internet] [Doctoral dissertation]. Universitat Politècnica de València; 2018. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/10251/94626.

Council of Science Editors:

Xuan T. Optical investigations on Diesel spray dynamics and in-flame soot formation . [Doctoral Dissertation]. Universitat Politècnica de València; 2018. Available from: http://hdl.handle.net/10251/94626

Michigan State University

13. Squibb, Cody. Experimental measurement and analysis of in-cylinder fuel-air mixing and combustion using an optical DI Diesel engine under realistic operating conditions.

Degree: 2012, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:45

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Thesis Ph. D. Michigan State University. Mechanical Engineering 2012.

In order to improve engine-out emissions and performance of Diesel combustion systems, continued insight into the… (more)

Subjects/Keywords: Diesel motor – Combustion; Fuel – Analysis; Mechanical engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Squibb, C. (2012). Experimental measurement and analysis of in-cylinder fuel-air mixing and combustion using an optical DI Diesel engine under realistic operating conditions. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:45

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Squibb, Cody. “Experimental measurement and analysis of in-cylinder fuel-air mixing and combustion using an optical DI Diesel engine under realistic operating conditions.” 2012. Thesis, Michigan State University. Accessed April 14, 2021. http://etd.lib.msu.edu/islandora/object/etd:45.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Squibb, Cody. “Experimental measurement and analysis of in-cylinder fuel-air mixing and combustion using an optical DI Diesel engine under realistic operating conditions.” 2012. Web. 14 Apr 2021.

Vancouver:

Squibb C. Experimental measurement and analysis of in-cylinder fuel-air mixing and combustion using an optical DI Diesel engine under realistic operating conditions. [Internet] [Thesis]. Michigan State University; 2012. [cited 2021 Apr 14]. Available from: http://etd.lib.msu.edu/islandora/object/etd:45.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Squibb C. Experimental measurement and analysis of in-cylinder fuel-air mixing and combustion using an optical DI Diesel engine under realistic operating conditions. [Thesis]. Michigan State University; 2012. Available from: http://etd.lib.msu.edu/islandora/object/etd:45

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Nottingham

14. Di Liberto, Gianluca. Mechanisms of soot transfer to oil of an HPCR diesel engine.

Degree: PhD, 2017, University of Nottingham

URL: http://eprints.nottingham.ac.uk/42331/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.719609

► High levels of soot-in-oil can cause an increase in engine wear and oil viscosity, thus reducing oil drain intervals. The mechanisms by which soot particles… (more)

▼ High levels of soot-in-oil can cause an increase in engine wear and oil viscosity, thus reducing oil drain intervals. The mechanisms by which soot particles are entrained into the bulk oil are not well understood. The research reported in this thesis addresses questions on the mechanisms of soot transfer to the lubricating oil in light-duty diesel engines with high pressure EGR systems. Deposition as a result of blow-by gas passing the piston ring pack and by absorption to the oil film on the cylinder liner via thermophoresis are soot transfer mechanisms that have been considered in detail. The investigations are based on analytical and simulation studies, and results based on complementary experimental studies are used to validate these. The experimental investigations aimed at evaluating the typical rate of accumulation and size distribution of soot agglomerates in oil. The oil samples analysed were collected during regular services from light-duty diesel engine vehicles. These were representative of vehicles meeting Euro IV and V emission regulation standards driven under real-world conditions. The rate of soot-in-oil was determined by thermogravimetric analysis and results showed a concentration of approximately 1 wt% of soot-in-oil after 15,000 km. The particle size distribution was determined using a novel technique, Nanoparticle Tracking Analysis (NTA), applied for the first time to soot-laden oil samples by the author [1, 2]. Results showed an average particle size distribution of 150 nm, irrespective of oil drain interval. Almost the totality of the particles were between 70 and 400 nm, with micro particles not detected in any of the samples analysed. For the samples investigated in this work, the Euro standard did not influence either the rate of soot deposition or the particles size distribution. To the author’s best knowledge, this is the first time that rate of soot deposition and particles size distribution from oil samples collected from vehicles of different Euro standard driven under real-world conditions are analysed and compared. Exhaust Gas Recirculation (EGR) is a common technique used in diesel engines in order to reduce NO¬x emissions. However, it has the drawback that it increases the production of soot. In this work, particular attention has been given to its effects on the rate of soot deposition in oil. Both its influence on the soot produced during the combustion process and on the soot re-introduced in the combustion chamber by the EGR gas has been investigated through CFD simulations using Kiva-3V. Examining the relative importance of near–surface transport of soot by thermophoresis to the oil film on the liner and from blow-by gases to surfaces in the ring pack shows the former to be the dominant mechanism of soot transfer. EGR increases the rate of deposition of soot on the liner not only by increasing net production of soot, but also through the re-cycled particles. At EGR levels higher than 20%, the contribution of the Re-cycled soot becomes the major source for soot-in-oil. The…

Subjects/Keywords: 621.43; TJ751 Internal combustion engines. Diesel engines

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Di Liberto, G. (2017). Mechanisms of soot transfer to oil of an HPCR diesel engine. (Doctoral Dissertation). University of Nottingham. Retrieved from http://eprints.nottingham.ac.uk/42331/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.719609

Chicago Manual of Style (16^th Edition):

Di Liberto, Gianluca. “Mechanisms of soot transfer to oil of an HPCR diesel engine.” 2017. Doctoral Dissertation, University of Nottingham. Accessed April 14, 2021. http://eprints.nottingham.ac.uk/42331/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.719609.

MLA Handbook (7^th Edition):

Di Liberto, Gianluca. “Mechanisms of soot transfer to oil of an HPCR diesel engine.” 2017. Web. 14 Apr 2021.

Vancouver:

Di Liberto G. Mechanisms of soot transfer to oil of an HPCR diesel engine. [Internet] [Doctoral dissertation]. University of Nottingham; 2017. [cited 2021 Apr 14]. Available from: http://eprints.nottingham.ac.uk/42331/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.719609.

Council of Science Editors:

Di Liberto G. Mechanisms of soot transfer to oil of an HPCR diesel engine. [Doctoral Dissertation]. University of Nottingham; 2017. Available from: http://eprints.nottingham.ac.uk/42331/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.719609

University of Nottingham

15. Wan Mahmood, Wan Mohd Faizal. Computational studies of soot paths to cylinder wall layers of a direct injection diesel engine.

Degree: PhD, 2011, University of Nottingham

URL: http://eprints.nottingham.ac.uk/12064/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.541430

► The investigation reported in this thesis is concerned with the topic of soot formation and soot particle motion in the cylinder of a light duty… (more)

▼ The investigation reported in this thesis is concerned with the topic of soot formation and soot particle motion in the cylinder of a light duty automotive diesel engine. CFD has been employed to simulate in-cylinder conditions and to investigate the source of particles which are transferred to the oil. The accumulation of soot in the lubricating oil of diesel engines is one of the factors limiting the interval between oil changes and hence service interval. Soot particles can be transferred to oil film on the cylinder wall layers through the complex motion of the fluid flow in the cylinder. The paths of soot particles from specific in-cylinder locations and crank angle instants have been explored using the results for cylinder charge motion predicted by the Kiva-3v CFD code. Using the velocity fields from the simulation data, massless tracking of the in-cylinder soot particles in space and time is carried out employing a particle tracking with trilinear interpolation technique. From this investigation, new computational codes for the prediction of soot particle paths and soot particle size change along a specific path in a diesel engine have been developed. This investigation is the first numerical study into soot particle trajectories within an engine and thus opens up a novel branch of research of soot formation within internal combustion engines. Computed soot paths from the investigation show that soot particles formed just below the fuel spray axis inside the middle bowl area during early injection period are more likely sources of soot particles on the cylinder wall layers than those formed later. Soot particles that are formed above the fuel axis have less tendency to be transported to the cylinder wall layers thus are not likely to be the main source of soot at the cylinder walls. Soot particles that are from the bowl rim area are found to be another source of soot transfer to the boundary layer, as they are directly exposed to reverse squish motion during the expansion stroke. Soot particles that are formed near the cylinder jet axis during fuel injection tend to move into the bowl. These soot particles are found to be from the relatively less concentrated area. In contrast, particles from the most concentrated areas tend to be moving into the bowl and pose least risk of contaminating oil films on the liner. Sensitivity studies of soot particle paths to swirl show that engine operating with low swirl ratios are more vulnerable to soot in oil problem as low swirls cause the bulk fluid flow to be moving closer to the cylinder walls due to fuel jet velocity and reverse squish motions. Decreasing the spray angle lessens the possibilities of soot particles from being transported close the cylinder wall layers while increasing the spray angle increases the possibilities of soot from the bowl region to be transported close to the cylinder wall layers. The temporal and spatial evolution of soot particle size can be predicted by using the history of temperature, pressure and gas species along the paths. An…

Subjects/Keywords: 621.43; TJ751 Internal combustion engines. Diesel engines

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Wan Mahmood, W. M. F. (2011). Computational studies of soot paths to cylinder wall layers of a direct injection diesel engine. (Doctoral Dissertation). University of Nottingham. Retrieved from http://eprints.nottingham.ac.uk/12064/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.541430

Chicago Manual of Style (16^th Edition):

Wan Mahmood, Wan Mohd Faizal. “Computational studies of soot paths to cylinder wall layers of a direct injection diesel engine.” 2011. Doctoral Dissertation, University of Nottingham. Accessed April 14, 2021. http://eprints.nottingham.ac.uk/12064/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.541430.

MLA Handbook (7^th Edition):

Wan Mahmood, Wan Mohd Faizal. “Computational studies of soot paths to cylinder wall layers of a direct injection diesel engine.” 2011. Web. 14 Apr 2021.

Vancouver:

Wan Mahmood WMF. Computational studies of soot paths to cylinder wall layers of a direct injection diesel engine. [Internet] [Doctoral dissertation]. University of Nottingham; 2011. [cited 2021 Apr 14]. Available from: http://eprints.nottingham.ac.uk/12064/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.541430.

Council of Science Editors:

Wan Mahmood WMF. Computational studies of soot paths to cylinder wall layers of a direct injection diesel engine. [Doctoral Dissertation]. University of Nottingham; 2011. Available from: http://eprints.nottingham.ac.uk/12064/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.541430

University of Nottingham

16. McGhee, Michael James. Factors influencing cycle-by-cycle combustion characteristics of a diesel engine under cold idling conditions.

Degree: PhD, 2013, University of Nottingham

URL: http://eprints.nottingham.ac.uk/13179/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.580219

► An experimental investigation of post-start cold idling behaviour has been carried out on a modern single-cylinder HPCR DI light duty diesel engine with a low… (more)

▼ An experimental investigation of post-start cold idling behaviour has been carried out on a modern single-cylinder HPCR DI light duty diesel engine with a low compression ratio of 15.5:1 at temperatures between 10 and -20°C. The trend toward lower compression ratios from more common values of around 22:1 a few years ago has resulted in lower compression pressures and temperatures, which negatively affects cold idle operation. Improvements in cycle-by-cycle stability of indicated work output through fuel injection strategy and glow plug temperature changes have been explored. This is important to improve NVH and the consumer’s perception of vehicle quality. The key effects on heat release characteristics have been identified and the associated impact on stability discussed. High speed imaging of ignition in a combustion bomb has been used to aid interpretation of engine results. Up to four pilot injections placed in advance of the main have been used. Shorter separation between pilots and pilot-to-main improves stability independent of the number of pilot injections and extends the range of main injection timings to meet target stability of 10% or lower at -20°C. Increasing the number of pilot injections was effective in stabilising combustion at all investigated soak temperatures at fuelling levels producing indicated work required to match friction and ancillary demands. Stability can be susceptible to deterioration at moderate soak temperatures because fuelling demand is relatively low. If a high number of pilot injections are to be avoided to reduce potential wear, then increasing main injection quantity is an effective method to stabilise combustion for a lower pilot number strategy but any increase above target load has to be harnessed by additional ancillary devices. Very high glow plug temperatures of up to 1200°C were examined using a smaller diameter tip ceramic type design. Stable combustion cannot be achieved through higher glow plug temperatures alone. A temperature of 1000°C, which can be achieved using a low voltage metallic type, is adequate to stabilise combustion when combined with a triple-pilot strategy at sub-zero temperatures. The best stability is achieved using 1200°C, which can only be achieved using a more expensive ceramic type, in combination with a triple-pilot strategy producing the desirable target of ~5% or below; the effects are not mutually exclusive. At high glow plug temperatures and using three or four pilot injections, stability improved with warmer soak temperatures. At -5°C, stability was relatively poor when one or two pilots were used irrespective of glow plug temperature. A high premixed contribution to main combustion is associated with improved stability. Minimum threshold values are necessary to stabilise combustion: ~25 J/° at -20°C, ~20 J/° at -5°C and only ~10 J/° at 10°C. A higher number of pilot injections raises pilot induced combustion and improves mixture distribution. These effects subsequently increase the premixed combustion and help sustain a strong main…

Subjects/Keywords: 621.436; TJ751 Internal combustion engines. Diesel engines

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APA (6^th Edition):

McGhee, M. J. (2013). Factors influencing cycle-by-cycle combustion characteristics of a diesel engine under cold idling conditions. (Doctoral Dissertation). University of Nottingham. Retrieved from http://eprints.nottingham.ac.uk/13179/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.580219

Chicago Manual of Style (16^th Edition):

McGhee, Michael James. “Factors influencing cycle-by-cycle combustion characteristics of a diesel engine under cold idling conditions.” 2013. Doctoral Dissertation, University of Nottingham. Accessed April 14, 2021. http://eprints.nottingham.ac.uk/13179/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.580219.

MLA Handbook (7^th Edition):

McGhee, Michael James. “Factors influencing cycle-by-cycle combustion characteristics of a diesel engine under cold idling conditions.” 2013. Web. 14 Apr 2021.

Vancouver:

McGhee MJ. Factors influencing cycle-by-cycle combustion characteristics of a diesel engine under cold idling conditions. [Internet] [Doctoral dissertation]. University of Nottingham; 2013. [cited 2021 Apr 14]. Available from: http://eprints.nottingham.ac.uk/13179/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.580219.

Council of Science Editors:

McGhee MJ. Factors influencing cycle-by-cycle combustion characteristics of a diesel engine under cold idling conditions. [Doctoral Dissertation]. University of Nottingham; 2013. Available from: http://eprints.nottingham.ac.uk/13179/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.580219

University of Nottingham

17. Chandran, Davannendran. Experimental investigation into the physico-chemical properties changes of palm biodiesel under common rail diesel engine operation for the elucidation of metal corrosion and elastomer degradation in fuel delivery system.

Degree: PhD, 2017, University of Nottingham

URL: http://eprints.nottingham.ac.uk/35228/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.734366

► Compatibility of fuel delivery materials (FDM) with biodiesel fuel in the fuel delivery system (FDS) under real-life common rail diesel engine (CRDE) operation poses a… (more)

▼ Compatibility of fuel delivery materials (FDM) with biodiesel fuel in the fuel delivery system (FDS) under real-life common rail diesel engine (CRDE) operation poses a challenge to researchers and engine manufacturers alike. Although standard methods such as ASTM G31 and ASTM D471 for metals and elastomers, respectively, are deemed suitable for evaluating the effects of water content, total acid number (TAN) and oxidation products in biodiesel on FDM degradation, they do not resemble the actual engine operation conditions such as varying fuel pressure/temperature as well as the presence of a wide range of materials in the FDS of a diesel engine. Hence, the current allowable maximum 20 vol% of biodiesel with 80 vol% of diesel (B20) for use in diesel engines to date is debatable. Additionally, biodiesel utilization beyond B20 is essential to combat declining air quality and to reduce the dependence on fuel imports. This thesis aims to elucidate the actual compatibility present between FDM and biodiesel in the FDS under real-life CRDE operation. This was achieved through multi-faceted experimentations which commenced with analyses on the deteriorated palm biodiesel samples collected during and after CRDE operation. Next, the fuel properties which should be emphasized based on the deteriorated fuel were determined. This was then followed by ascertaining the effects of the emphasized fuel properties towards FDM degradation. Ultimately, the actual compatibility of FDM with biodiesel under engine operation through modified immersion investigations was determined. FDM degradation acceleration factors such as oxidized biodiesel, TAN and water content were eliminated since these factors were not affected based on the analysed fuel samples collected after engine operation. No oxidation products such as aldehydes, ketones and carboxylic acids were detected while the TAN and water content were within 0.446% and 0.625% of their initial values, respectively. Instead, the biodiesel’s dissolved oxygen (DO) concentration and conductivity value were not only found to have changed during and after engine operation by -93% and 293%, respectively, but were also found to have influenced biodiesel deterioration under engine operation. These two properties were subsequently discovered to have adversely affected FDM degradation independently. The copper corrosion rate and nitrile rubber (NBR) volume change increased by 9% and 13%, respectively, due to 22% increase in the conductivity value. In contrast, the copper corrosion rate and NBR volume swelling reduced by 91% and 27%, respectively, due to 96% reduction in the DO concentration. Ultimately, copper corrosion and NBR degradation were determined to be lowered by up to 92% and 73%, respectively, under modified immersion as compared to typical immersion condition. These outcomes distinctly show that acceptable to good compatibility is present between FDM and biodiesel under CRDE operation. The good compatibility is strongly supported since only a maximum lifespan reduction of 1.5 years is…

Subjects/Keywords: 621.43; TJ751 Internal combustion engines. Diesel engines

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APA (6^th Edition):

Chandran, D. (2017). Experimental investigation into the physico-chemical properties changes of palm biodiesel under common rail diesel engine operation for the elucidation of metal corrosion and elastomer degradation in fuel delivery system. (Doctoral Dissertation). University of Nottingham. Retrieved from http://eprints.nottingham.ac.uk/35228/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.734366

Chicago Manual of Style (16^th Edition):

Chandran, Davannendran. “Experimental investigation into the physico-chemical properties changes of palm biodiesel under common rail diesel engine operation for the elucidation of metal corrosion and elastomer degradation in fuel delivery system.” 2017. Doctoral Dissertation, University of Nottingham. Accessed April 14, 2021. http://eprints.nottingham.ac.uk/35228/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.734366.

MLA Handbook (7^th Edition):

Chandran, Davannendran. “Experimental investigation into the physico-chemical properties changes of palm biodiesel under common rail diesel engine operation for the elucidation of metal corrosion and elastomer degradation in fuel delivery system.” 2017. Web. 14 Apr 2021.

Vancouver:

Chandran D. Experimental investigation into the physico-chemical properties changes of palm biodiesel under common rail diesel engine operation for the elucidation of metal corrosion and elastomer degradation in fuel delivery system. [Internet] [Doctoral dissertation]. University of Nottingham; 2017. [cited 2021 Apr 14]. Available from: http://eprints.nottingham.ac.uk/35228/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.734366.

Council of Science Editors:

Chandran D. Experimental investigation into the physico-chemical properties changes of palm biodiesel under common rail diesel engine operation for the elucidation of metal corrosion and elastomer degradation in fuel delivery system. [Doctoral Dissertation]. University of Nottingham; 2017. Available from: http://eprints.nottingham.ac.uk/35228/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.734366

University of Cape Town

18. Velaers, Adrian. Investigation of combustion image analysis by the two-colour method as a technique for comparing diesal fuels.

Degree: Image, Mechanical Engineering, 2006, University of Cape Town

URL: http://hdl.handle.net/11427/14951

► This project involves an investigation of combustion image analysis by the two-colour method as a technique for comparing diesel fuels. The purpose is to master… (more)

Subjects/Keywords: Combustion; Diesel fuels

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APA (6^th Edition):

Velaers, A. (2006). Investigation of combustion image analysis by the two-colour method as a technique for comparing diesal fuels. (Thesis). University of Cape Town. Retrieved from http://hdl.handle.net/11427/14951

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Velaers, Adrian. “Investigation of combustion image analysis by the two-colour method as a technique for comparing diesal fuels.” 2006. Thesis, University of Cape Town. Accessed April 14, 2021. http://hdl.handle.net/11427/14951.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Velaers, Adrian. “Investigation of combustion image analysis by the two-colour method as a technique for comparing diesal fuels.” 2006. Web. 14 Apr 2021.

Vancouver:

Velaers A. Investigation of combustion image analysis by the two-colour method as a technique for comparing diesal fuels. [Internet] [Thesis]. University of Cape Town; 2006. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/11427/14951.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Velaers A. Investigation of combustion image analysis by the two-colour method as a technique for comparing diesal fuels. [Thesis]. University of Cape Town; 2006. Available from: http://hdl.handle.net/11427/14951

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

King Abdullah University of Science and Technology

19. Aljabri, Hammam H. A Computational Investigation of Multiple Injection Strategy in an Isobaric Combustion Engine.

Degree: Physical Science and Engineering (PSE) Division, 2019, King Abdullah University of Science and Technology

URL: http://hdl.handle.net/10754/656454

► Abstract: This thesis aims to contribute to the development of the isobaric combustion engines by exploring multiple injection strategies, by means of computational simulations using… (more)

▼ Abstract: This thesis aims to contribute to the development of the isobaric combustion engines by exploring multiple injection strategies, by means of computational simulations using a commercial software Converge. A single injection case validated with experimental data in terms pressure trace and heat release rate was used as a baseline reference. The adjustment of the turbulent kinetic energy dissipation constant is found to have the most significant influence in reproducing the pressure and heat release rate histories observed in the experiment. As a first attempt to achieve isobaric combustion, a multiple injection strategy using a single injector was explored with up to four consecutive injections. Considering that the computational simulations were unable to reproduce the experimental data due to a number of uncertainties in the implemented models, the present study attempted to identify the main causes of the discrepancies through various parametric studies. First, different liquid fuel properties were examined and it was found that, while the physical properties of the fuels have a notable effect in terms of evaporation and atomization, such variations were not sufficient to reproduce the experimentally observed heat release cycle. Next, the effects of the uncertainties in the kinetic mechanisms were assessed by the reaction multiplier, an artificial adjustment of the rate constants, and it was found that the reaction multiplier affected the ignition of the first injection, but not the subsequent injection events. As such, the use of reaction multipliers to reproduce the experimental data was found to be unsuccessful. The effect of thermodynamics properties was also examined by employing real-gas equations of state, such as Redlich-Kwong and Peng-Robinson, and the results showed little difference at the conditions under consideration. Finally, advancing the start of injection was found to have the most significant effect on pressure trace and heat release rate to lead to a substantial improvement in the numerical prediction. The results suggest that the key uncertainties in modeling of the present engine combustion are likely the accurate timing of the start of injection combined with the exact injection rate shape profile. Advisors/Committee Members: Im, Hong G. (advisor), Johansson, Bengt (committee member), Parsani, Matteo (committee member).

Subjects/Keywords: Isobaric Combustion; CFD; Multiple Injection; Diesel Engine

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APA (6^th Edition):

Aljabri, H. H. (2019). A Computational Investigation of Multiple Injection Strategy in an Isobaric Combustion Engine. (Thesis). King Abdullah University of Science and Technology. Retrieved from http://hdl.handle.net/10754/656454

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Aljabri, Hammam H. “A Computational Investigation of Multiple Injection Strategy in an Isobaric Combustion Engine.” 2019. Thesis, King Abdullah University of Science and Technology. Accessed April 14, 2021. http://hdl.handle.net/10754/656454.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Aljabri, Hammam H. “A Computational Investigation of Multiple Injection Strategy in an Isobaric Combustion Engine.” 2019. Web. 14 Apr 2021.

Vancouver:

Aljabri HH. A Computational Investigation of Multiple Injection Strategy in an Isobaric Combustion Engine. [Internet] [Thesis]. King Abdullah University of Science and Technology; 2019. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/10754/656454.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Aljabri HH. A Computational Investigation of Multiple Injection Strategy in an Isobaric Combustion Engine. [Thesis]. King Abdullah University of Science and Technology; 2019. Available from: http://hdl.handle.net/10754/656454

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

20. McKeathen, Benjamin Jack. Diesel Fuel Cetane Number Effects on Engine Efficiency and Emissions.

Degree: MS, Mechanical Engineering, 2018, Texas A&M University

URL: http://hdl.handle.net/1969.1/173347

► Diesel engine combustion is heavily impacted by the chemical and physical properties of the fuel being used. Fuel composition plays a role in the in-cylinder… (more)

Subjects/Keywords: Diesel Engines; Diesel; Cetane; Biodiesel; Gas-to-Liquids; Combustion; Emissions

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APA (6^th Edition):

McKeathen, B. J. (2018). Diesel Fuel Cetane Number Effects on Engine Efficiency and Emissions. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/173347

Chicago Manual of Style (16^th Edition):

McKeathen, Benjamin Jack. “Diesel Fuel Cetane Number Effects on Engine Efficiency and Emissions.” 2018. Masters Thesis, Texas A&M University. Accessed April 14, 2021. http://hdl.handle.net/1969.1/173347.

MLA Handbook (7^th Edition):

McKeathen, Benjamin Jack. “Diesel Fuel Cetane Number Effects on Engine Efficiency and Emissions.” 2018. Web. 14 Apr 2021.

Vancouver:

McKeathen BJ. Diesel Fuel Cetane Number Effects on Engine Efficiency and Emissions. [Internet] [Masters thesis]. Texas A&M University; 2018. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/1969.1/173347.

Council of Science Editors:

McKeathen BJ. Diesel Fuel Cetane Number Effects on Engine Efficiency and Emissions. [Masters Thesis]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/173347

21. Kezrane, Cheikh. Investigations numériques du processus de combustion dans un moteur diesel.

Degree: 2009, Université M'Hamed Bougara Boumerdès

URL: http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/1047

►

60 p. : ill. ; 30 cm

Le développement actuel des moteurs à combustion interne doit répondre à une volonté persistante de réduction de la… (more)

Subjects/Keywords: Modèles mathématiques; Simulation par ordinateur; Moteurs : Combustion; Moteurs diesel : Combustion

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APA (6^th Edition):

Kezrane, C. (2009). Investigations numériques du processus de combustion dans un moteur diesel. (Thesis). Université M'Hamed Bougara Boumerdès. Retrieved from http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/1047

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kezrane, Cheikh. “Investigations numériques du processus de combustion dans un moteur diesel.” 2009. Thesis, Université M'Hamed Bougara Boumerdès. Accessed April 14, 2021. http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/1047.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kezrane, Cheikh. “Investigations numériques du processus de combustion dans un moteur diesel.” 2009. Web. 14 Apr 2021.

Vancouver:

Kezrane C. Investigations numériques du processus de combustion dans un moteur diesel. [Internet] [Thesis]. Université M'Hamed Bougara Boumerdès; 2009. [cited 2021 Apr 14]. Available from: http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/1047.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kezrane C. Investigations numériques du processus de combustion dans un moteur diesel. [Thesis]. Université M'Hamed Bougara Boumerdès; 2009. Available from: http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/1047

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

22. Kezrane, Cheikh. Investigations numériques du processus de combustion dans un moteur diesel.

Degree: 2009, Université M'Hamed Bougara Boumerdès

URL: http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/440

►

60 p. ; ill. ; 30cm

Le développement actuel des moteurs à combustion interne doit répondre à une volonté persistante de réduction de la consommation… (more)

Subjects/Keywords: Modèles mathématiques; Simulation par ordinateur; Moteurs : Combustion; Moteurs diesel : Combustion

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APA (6^th Edition):

Kezrane, C. (2009). Investigations numériques du processus de combustion dans un moteur diesel. (Thesis). Université M'Hamed Bougara Boumerdès. Retrieved from http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/440

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kezrane, Cheikh. “Investigations numériques du processus de combustion dans un moteur diesel.” 2009. Thesis, Université M'Hamed Bougara Boumerdès. Accessed April 14, 2021. http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/440.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kezrane, Cheikh. “Investigations numériques du processus de combustion dans un moteur diesel.” 2009. Web. 14 Apr 2021.

Vancouver:

Kezrane C. Investigations numériques du processus de combustion dans un moteur diesel. [Internet] [Thesis]. Université M'Hamed Bougara Boumerdès; 2009. [cited 2021 Apr 14]. Available from: http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/440.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kezrane C. Investigations numériques du processus de combustion dans un moteur diesel. [Thesis]. Université M'Hamed Bougara Boumerdès; 2009. Available from: http://dlibrary.univ-boumerdes.dz:8080/jspui/handle/123456789/440

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Université Laval

23. Youssef, Moafaq Mohamed. Exploration of novel fuels for gas turbine (ENV-406) : modeling of T60 test rig with diesel & biodiesel fuels.

Degree: 2014, Université Laval

URL: http://hdl.handle.net/20.500.11794/25332

►

Dans cette thèse, un modèle numérique a été proposé pour simuler la combustion liquide des carburants conventionnels et non-conventionnels, en particulier le mélange de biodiesel… (more)

▼

Dans cette thèse, un modèle numérique a été proposé pour simuler la combustion liquide des carburants conventionnels et non-conventionnels, en particulier le mélange de biodiesel B20. La matrice de test numérique constitue de quatre cas d’écoulement réactifs c.à.d. avec combustion et d’un cinquième avec injection liquide sans combustion (écoulement non-réactif). Les modèles sont calculés à l’aide du logiciel FLUENT™ v.14 en 3D et a l’état stationnaire. Les flammes de diffusion turbulentes sont modélisées en utilisant l’approche de flammelette laminaire stable, avec une fonction de densité de probabilité jointe (PDF). La Validation est effectuée en comparant les mesures expérimentales disponibles avec les résultats obtenus de la CFD. L’aérodynamique de la chambre de combustion, ainsi que les températures de parois extérieures sont captures avec un degré de précision satisfaisant. La validation des principaux produits de combustion, tels que : CO2, H2O et O2, montre des résultats satisfaisants pour tous les cas d'écoulement réactifs, mais certaines incohérences ont été relevées pour les émissions de CO. On pense que le banc d'essai (la géométrie de la chambre de combustion et son état de fonctionnement) n'est pas suffisamment adéquat pour la combustion de combustibles liquides. D’autre part, et d’un point de vue numérique, l’approche de flammelette laminaire stable a été trouvé raisonnablement hors mesure de saisir les effets profonds du non-équilibre chimique qui sont souvent associés au processus de lente formation d’un polluant, comme le CO.

In this thesis, a CFD model was proposed to simulate the liquid combustion of conventional and non-conventional biodiesel fuels, in particularly the B20 biodiesel blend. The numerical test matrix consists of four reacting flow cases, and one non-reacting liquid fuel injection case. The models are computed using FLUENT™ v.14 in a 3D steady-state fashion. The turbulent non-premixed diffusion flames are modeled using the steady laminar flamelet approach; with a joint presumed Probability density function (PDF) distribution. Validation is achieved by comparing available experimental measurements with the obtained CFD results. Combustor aerodynamics and the outer wall temperatures are captured with a satisfactory degree of accuracy. Validation of the main combustion products, such as: CO2, H2O, and O2, shows satisfactory results for all the reacting flow cases; however, some inconsistencies were found for the CO emissions. It is believed that the test rig (combustor geometry and operating condition) is not sufficiently adequate for burning liquid fuels. On the other hand, from a numerical combustion point of view, the steady laminar flamelet approach was found not reasonably able to capture the deep non-equilibrium effects associated with the slow formation process of a pollutant, such as CO.

Advisors/Committee Members: Champlain, Alain de.

Subjects/Keywords: TJ 7.5 UL 2014; Turbines à gaz – Combustion; Turbines à gaz – Combustion – Modèles mathématiques; Carburants diesel – Combustion; Carburants diesel – Combustion – Modèles mathématiques; Biodiesel – Combustion; Biodiesel – Combustion – Modèles mathématiques

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Youssef, M. M. (2014). Exploration of novel fuels for gas turbine (ENV-406) : modeling of T60 test rig with diesel & biodiesel fuels. (Thesis). Université Laval. Retrieved from http://hdl.handle.net/20.500.11794/25332

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Youssef, Moafaq Mohamed. “Exploration of novel fuels for gas turbine (ENV-406) : modeling of T60 test rig with diesel & biodiesel fuels.” 2014. Thesis, Université Laval. Accessed April 14, 2021. http://hdl.handle.net/20.500.11794/25332.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Youssef, Moafaq Mohamed. “Exploration of novel fuels for gas turbine (ENV-406) : modeling of T60 test rig with diesel & biodiesel fuels.” 2014. Web. 14 Apr 2021.

Vancouver:

Youssef MM. Exploration of novel fuels for gas turbine (ENV-406) : modeling of T60 test rig with diesel & biodiesel fuels. [Internet] [Thesis]. Université Laval; 2014. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/20.500.11794/25332.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Youssef MM. Exploration of novel fuels for gas turbine (ENV-406) : modeling of T60 test rig with diesel & biodiesel fuels. [Thesis]. Université Laval; 2014. Available from: http://hdl.handle.net/20.500.11794/25332

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Lund

24. Dahlström, Jessica. Experimental Investigations of Combustion Chamber Heat Transfer in a Light-Duty Diesel Engine.

Degree: 2016, University of Lund

URL: https://lup.lub.lu.se/record/9adf550d-7efa-4a70-b41c-99f913047dbd ; https://portal.research.lu.se/ws/files/7644748/Experimental_investigations_of_combustion_chamber_heat_transfer_in_a_light_duty_diesel_engine.pdf

► This work concerned experimental studies of heat transfer in a light-duty diesel engine. Combustion is affected by several parameters, such as pressure, engine speed, mass… (more)

▼ This work concerned experimental studies of heat transfer in a light-duty diesel engine. Combustion is affected by several parameters, such as pressure, engine speed, mass of injected fuel and in-cylinder gas flow. These parameters are in turn affected by the combustion chamber geometry and fuel spray characteristics. At high load the exhaust heat was increased more than at high engine speed. Swirl was found to speed up the combustion event and increased heat loss to the piston cooling, but had no measurable effect on exhaust heat loss. Exhaust gas recirculation (EGR) diverts part of the exhaust gas and mixes it with intake air. The recirculated gas acts as a heat sink and reduces in-cylinder temperatures and thus, heat losses. The air-fuel ratio is another important factor. More air resulted in faster combustion while also increasing exhaust gas temperature. Altering the combustion chamber geometry affected both in-cylinder gas flow and mixing. A more open and shallow design was found to redistribute heat losses from cooling media to exhaust. The original injectors were proven to have a higher fuel flow than the two other configurations, but faster combustion and less heat in the exhaust was mainly found with the injectors with fewest holes. Hot exhaust gases could be more useful than hot cooling media, because that heat may be extracted and used to improve engine efficiency. This reduces fuel consumption, and consequently emissions of greenhouse gases, which contribute to global warming. The world energy demand is still increasing, and more natural resources are being used. Higher efficiency requires less fuel, and thereby reduces the impact on environment and humanity. The work was performed in a 4-cylinder light-duty diesel engine. Temperatures and mass flow measurements were performed in cooling media and exhaust gas. From these calculations were executed to find out the heat fractions emitted to each medium. Two combustion chamber geometries and three injectors were tested and compared with respect to their impact on combustion and heat losses.

Subjects/Keywords: Engineering and Technology; internal combustion engines; heat transfer; diesel engine; Diesel combustion; combustion chamber geometry; piston geometry; spray parameters

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Dahlström, J. (2016). Experimental Investigations of Combustion Chamber Heat Transfer in a Light-Duty Diesel Engine. (Doctoral Dissertation). University of Lund. Retrieved from https://lup.lub.lu.se/record/9adf550d-7efa-4a70-b41c-99f913047dbd ; https://portal.research.lu.se/ws/files/7644748/Experimental_investigations_of_combustion_chamber_heat_transfer_in_a_light_duty_diesel_engine.pdf

Chicago Manual of Style (16^th Edition):

Dahlström, Jessica. “Experimental Investigations of Combustion Chamber Heat Transfer in a Light-Duty Diesel Engine.” 2016. Doctoral Dissertation, University of Lund. Accessed April 14, 2021. https://lup.lub.lu.se/record/9adf550d-7efa-4a70-b41c-99f913047dbd ; https://portal.research.lu.se/ws/files/7644748/Experimental_investigations_of_combustion_chamber_heat_transfer_in_a_light_duty_diesel_engine.pdf.

MLA Handbook (7^th Edition):

Dahlström, Jessica. “Experimental Investigations of Combustion Chamber Heat Transfer in a Light-Duty Diesel Engine.” 2016. Web. 14 Apr 2021.

Vancouver:

Dahlström J. Experimental Investigations of Combustion Chamber Heat Transfer in a Light-Duty Diesel Engine. [Internet] [Doctoral dissertation]. University of Lund; 2016. [cited 2021 Apr 14]. Available from: https://lup.lub.lu.se/record/9adf550d-7efa-4a70-b41c-99f913047dbd ; https://portal.research.lu.se/ws/files/7644748/Experimental_investigations_of_combustion_chamber_heat_transfer_in_a_light_duty_diesel_engine.pdf.

Council of Science Editors:

Dahlström J. Experimental Investigations of Combustion Chamber Heat Transfer in a Light-Duty Diesel Engine. [Doctoral Dissertation]. University of Lund; 2016. Available from: https://lup.lub.lu.se/record/9adf550d-7efa-4a70-b41c-99f913047dbd ; https://portal.research.lu.se/ws/files/7644748/Experimental_investigations_of_combustion_chamber_heat_transfer_in_a_light_duty_diesel_engine.pdf

Anna University

25. Mani M. An experimental investigation to study the performance and emission characteristics of waste plastic oil fuelled DI diesel engine;.

Degree: 2013, Anna University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/11557

►

The world at present is confronted with the twin crisis of fossil fuel depletion and environmental degradation. Increase in energy demand, stringent emission norms and… (more)

▼

The world at present is confronted with the twin crisis of fossil fuel depletion and environmental degradation. Increase in energy demand, stringent emission norms and depletion of oil resources have led the researchers to find alternative fuels for internal combustion engines. Research work is still in progress in finding out other alternative fuels mainly derived from renewable or from wastes. In this context, waste plastic oil is considered an alternative fuel since it has properties closer to that of petroleum based fuels. Waste plastic also pose a very serious environment challenge because of their disposal problems all over the world. Plastics have now become indispensable materials in the modern world and application in the industrial field is continually increasing. In the present work, experimental investigations have been carried out on using waste plastic oil as an alternative fuel for diesel. The present work mainly focusses on comparing the different methods to improve the performance of a neat waste plastic oil (WPO) fuelled compression ignition engine. A single cylinder, four stroke air cooled constant speed DI diesel engine with a rated output of 4.4 kW at 1500 rpm was used for the experimental work. Investigations include the study of combustion, performance and emission characteristics of diesel engine fuelled with Waste plastic oil (WPO) Diesel Fuel (DF) blends and distilled waste plastic oil (DWPO) as fuels. In the fifth technique, neat DWPO was used at different retarded injection timing with optimised EGR flow. In the sixth technique, neat DWPO was used at different nozzle opening pressure with optimised retarded injection timing and EGR. Further, improvements in brake thermal efficiency with a significant reduction in over all emissions are noticed. EGR is effective in controlling the NOX emissions significantly. By using nozzle opening pressure, shows an improvement in performance with significant reduction in emissions. newline newline newline

Appendices 1 to 8; pp. 145 - 160

Advisors/Committee Members: Nagaraj G.

Subjects/Keywords: Waste plastic oil; Diesel engine; combustion; performance; emission; Diesel Fuel; Distrilled waste plastic oil

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

M, M. (2013). An experimental investigation to study the performance and emission characteristics of waste plastic oil fuelled DI diesel engine;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/11557

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

M, Mani. “An experimental investigation to study the performance and emission characteristics of waste plastic oil fuelled DI diesel engine;.” 2013. Thesis, Anna University. Accessed April 14, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/11557.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

M, Mani. “An experimental investigation to study the performance and emission characteristics of waste plastic oil fuelled DI diesel engine;.” 2013. Web. 14 Apr 2021.

Vancouver:

M M. An experimental investigation to study the performance and emission characteristics of waste plastic oil fuelled DI diesel engine;. [Internet] [Thesis]. Anna University; 2013. [cited 2021 Apr 14]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/11557.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

M M. An experimental investigation to study the performance and emission characteristics of waste plastic oil fuelled DI diesel engine;. [Thesis]. Anna University; 2013. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/11557

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

26. Jaichandar S. Performance and emission studies on Bio diesel using different combustion chambers in ci engine;.

Degree: Bio diesel using different combustion chambers in CI Engine, 2014, Anna University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/17299

►

The fossil fuels are depleting and their prices are going up day by newlineday. Moreover, the environmental issues concerned with the exhaust gases newlineemission by… (more)

▼

The fossil fuels are depleting and their prices are going up day by newlineday. Moreover, the environmental issues concerned with the exhaust gases newlineemission by the usage of fossil fuels are also increasing steadily. In this newlinecontext, there has been growing interest on alternative fuels such as biodiesel newlineto provide a suitable diesel oil substitute for internal combustion engines. newlineVarious researchers have shown that biodiesel fuel exhibits physical, newlinechemical and thermodynamic properties which are similar or even better than newlinethat of petroleum based diesel fuel (PBDF). However certain properties such newlineas viscosity, calorific value, density and isothermal compressibility of newlinebiodiesel differ from PBDF. These properties strongly affect injection, airfuel newlinemixing and thereby combustion characteristics of biodiesel in a diesel newlineengine. A number of experimental investigations were carried out on the newlineperformance and emission characteristics of biodiesel fuelled diesel engines, newlinewithout any modification to the engines. These investigations have reported newlinethat, the use of neat biodiesel and its blends in the diesel engine, increased newlinebrake specific fuel consumption, decreased brake thermal efficiency and newlinebrake mean effective pressure compared to PBDF. In addition, increased newlineexhaust emission levels of oxides of nitrogen (NOx) have also been reported. The poor performance of biodiesel operated diesel engine in comparison with newlinePBDF fuelled diesel engine is mainly due to change in fuel properties, engine newlinedesign and operating parameters. Although transesterification reduces newlineviscosity of biodiesel, the viscosity of biodiesel was found to be 60-85% newlinehigher than PBDF. The high viscosity of biodiesel affects injection newlinecharacteristics, particularly atomization of the fuel. Poor atomization, newlineinsufficient in-cylinder air motion and low volatility of biodiesel lead to newlinedifficulty in the air-fuel mixing.

appendix p.180-189, references p.190-198.

Advisors/Committee Members: Annamalai K.

Subjects/Keywords: Bio-diesel; CI Engine; Combustion chambers; Mechanical Engineering; Petroleum based diesel fuel; Pongamia Oil

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

S, J. (2014). Performance and emission studies on Bio diesel using different combustion chambers in ci engine;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/17299

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

S, Jaichandar. “Performance and emission studies on Bio diesel using different combustion chambers in ci engine;.” 2014. Thesis, Anna University. Accessed April 14, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/17299.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

S, Jaichandar. “Performance and emission studies on Bio diesel using different combustion chambers in ci engine;.” 2014. Web. 14 Apr 2021.

Vancouver:

S J. Performance and emission studies on Bio diesel using different combustion chambers in ci engine;. [Internet] [Thesis]. Anna University; 2014. [cited 2021 Apr 14]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/17299.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

S J. Performance and emission studies on Bio diesel using different combustion chambers in ci engine;. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/17299

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

27. Gorgoraptis, Eleftherios. Simulation numérique directe pour la modélisation de la combustion Diesel dans des configurations d’injections multiples : DNS for RANS combustion modelling in multiple injection configurations.

Degree: Docteur es, Combustion, 2018, Université Paris-Saclay (ComUE)

URL: http://www.theses.fr/2018SACLC111

►

Le moteur à allumage par compression est incontestablement une des solutions pour réduire les émissions de CO2. L’utilisation de forts rapports de compression permet d’atteindre… (more)

▼

Le moteur à allumage par compression est incontestablement une des solutions pour réduire les émissions de CO2. L’utilisation de forts rapports de compression permet d’atteindre des rendements plus élevés que les moteurs à allumage commandé. Cependant, cette motorisation possède un certain nombre de défauts liés à l’inflammation du carburant et au contrôle du dégagement de chaleur. Ainsi, lorsque le moteur à allumage par compression est associé à un carburant Diesel et utilisant les systèmes d’injection traditionnels, les niveaux des émissions polluantes et du bruit de combustion peuvent devenir critiques. Une solution consiste à décomposer l’injection du carburant en plusieurs pulses (injections multiples) afin d’obtenir un contrôle optimal de la stratification du mélange air-carburant et du taux de dégagement de chaleur. Cette approche, rendue possible par le rail haute pression, est en train de devenir la règle dans les moteurs Diesel. Devant la complexité des phénomènes physico-chimiques rencontrés lors de de la combustion Diesel avec des injections multiples, la modélisation de celle-ci par des outils industriels telle que la modélisation 3D RANS (résolution des équations moyennes) reste un challenge. L’amélioration des modèles est donc essentielle afin de prédire le dégagement de chaleur et les émissions polluantes. Etant donné le manque de résultats expérimentaux précis, suffisamment détaillés et complets, l’amélioration substantielle des modèles reste problématique. La simulation numérique directe (DNS) est donc un outil permettant de générer des résultats détaillés et ainsi de développer et évaluer des modèles pour la simulation RANS. Dans cette thèse, différents modèles de combustion reposant sur une approche tabulée de la chimie ont été évalués afin de dégager leurs voies d’amélioration dans des configurations d’injections multiples, en ayant recours à des DNS de configurations représentatives d’injections multiples. Une base de données DNS représentative du problème a été construite, analysée et a servi ensuite de support à l’analyse approfondie des modèles étudiés. A la suite de cette analyse, certaines hypothèses sous-jacentes aux modèles ont été revisitées.

Compression-ignition engines are widelyused, mainly due to their high thermal efficiency andconsequent low CO2 emissions compared to sparkignitionengines. However, this technology has somedisadvantages related to the limited control over autoignitionof the air-fuel mixtures and heat release rate.Hence, in compression-ignition engines at their mostbasic form, the level of combustion noise and emissionsof nitrogen oxides and particulate matter canbecome critical. An effective strategy to tackle theseproblems is to decompose fuel injection into multipleinjection pulses permitting an optimal control of theair-fuel mixture formation and, thus, of the autoignitiondelay and the heat release rate. Multiple injectionstrategies become more and more popular dueto their advantages over conventional single injectioncycles. The physical phenomena involved in…

Advisors/Committee Members: Pires Da Cruz, Antonio (thesis director), Michel, Jean-Baptiste (thesis director).

Subjects/Keywords: Modèles de combustion; Diesel; Dns; Injections multiples; Multi-Injection; Modeling; Diesel; Dns

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gorgoraptis, E. (2018). Simulation numérique directe pour la modélisation de la combustion Diesel dans des configurations d’injections multiples : DNS for RANS combustion modelling in multiple injection configurations. (Doctoral Dissertation). Université Paris-Saclay (ComUE). Retrieved from http://www.theses.fr/2018SACLC111

Chicago Manual of Style (16^th Edition):

Gorgoraptis, Eleftherios. “Simulation numérique directe pour la modélisation de la combustion Diesel dans des configurations d’injections multiples : DNS for RANS combustion modelling in multiple injection configurations.” 2018. Doctoral Dissertation, Université Paris-Saclay (ComUE). Accessed April 14, 2021. http://www.theses.fr/2018SACLC111.

MLA Handbook (7^th Edition):

Gorgoraptis, Eleftherios. “Simulation numérique directe pour la modélisation de la combustion Diesel dans des configurations d’injections multiples : DNS for RANS combustion modelling in multiple injection configurations.” 2018. Web. 14 Apr 2021.

Vancouver:

Gorgoraptis E. Simulation numérique directe pour la modélisation de la combustion Diesel dans des configurations d’injections multiples : DNS for RANS combustion modelling in multiple injection configurations. [Internet] [Doctoral dissertation]. Université Paris-Saclay (ComUE); 2018. [cited 2021 Apr 14]. Available from: http://www.theses.fr/2018SACLC111.

Council of Science Editors:

Gorgoraptis E. Simulation numérique directe pour la modélisation de la combustion Diesel dans des configurations d’injections multiples : DNS for RANS combustion modelling in multiple injection configurations. [Doctoral Dissertation]. Université Paris-Saclay (ComUE); 2018. Available from: http://www.theses.fr/2018SACLC111

Universitat Politècnica de València

28. Viera Sotillo, Alberto Antonio. Effect of multiple injection strategies on the Diesel spray formation and combustion using optical diagnostics .

Degree: 2019, Universitat Politècnica de València

URL: http://hdl.handle.net/10251/123954

► [ES] En los últimos años, la evolución de las tecnologías de inyección ha permitido no solo mejorar el proceso de mezcla, sino también controlar con… (more)

▼ [ES] En los últimos años, la evolución de las tecnologías de inyección ha permitido no solo mejorar el proceso de mezcla, sino también controlar con precisión los parámetros de inyección, agregando flexibilidad a los sistemas para nuevas estrategias y un grado adicional de complejidad para los investigadores. Más aún, las estrategias de inyecciones múltiples han demostrado ser capaces de reducir el consumo de combustible, así como también la emisión de partículas, los óxidos de carbono, los óxidos de nitrógeno, el hollín y los hidrocarburos no quemados, convirtiéndose en un estándar en la industria. Esta tesis presenta una metodología experimental para estudiar los efectos de dos estrategias diferentes de inyección múltiple (piloto-principal y principal-post) sobre el desarrollo fundamental y la combustión del chorro. Primero, se caracterizó hidráulicamente el inyector midiendo su tasa de inyección y flujo de cantidad de movimiento. Para una masa inyectada objetivo, se obtuvo la distribución de combustible para los diferentes tiempos de separación y las cantidades de piloto/post. Se implementó un nuevo enfoque para evaluar la distribución de combustible utilizando la señal de flujo de cantidad de movimiento. Se pudo observar que las inyecciones de piloto/post que se realizan en un estado totalmente transitorio presentan mayor desviación entre disparos. El aumento de la cantidad inyectada redujo la dispersión, con un ligero descenso al disminuir también la presión del rail. La repetibilidad de las inyecciones post se vio afectada significativamente por el tiempo de separación entre pulsos. Luego, se aplicaron diagnósticos ópticos de alta velocidad para visualizar el desarrollo del chorro en atmósferas tanto inerte como reactiva. Se utilizaron dos nuevas soluciones de procesado de imágenes: una para desacoplar dos eventos de inyección que coexisten en un solo cuadro, y otra para estimar el tiempo de retraso al autoencendido de múltiples inyecciónes. En cuanto al desarrollo del chorro en condiciones inertes, no se observó ninguna influencia en la longitud líquida estabilizada y el ángulo del chorro, respecto a la cantidad inyectada por la piloto, ni de su separación al pulso principal. Con respecto a la fase vapor, el aumento de la masa inyectada del primer pulso empujó la zona de transición más allá del límite óptico. En general, el segundo pulso penetró a una mayor velocidad, comparado con el caso de una inyección única. El ángulo de dispersión de la fase de vapor aumentó con la inclusión de la inyección piloto, pero no se observó una tendencia clara con respecto a la cantidad de la piloto ni a su tiempo de separación. En cuanto al desarrollo del chorro en condiciones reactivas, el tiempo de retraso al autoencendido del segundo pulso disminuyó en referencia a su inicio de inyección. En promedio, las estrategias piloto-principal vieron reducciones del 30% al 40%, mientras que las principal-post del 40% al 50%. Con respecto a la longitud de despegue estabilizada, no se observó una tendencia definida con respecto a los… Advisors/Committee Members: Payri Marín, Raúl (advisor).

Subjects/Keywords: Multiple injections; Diesel injection; Spray segmentation; Image processing; Schlieren; Diffused back-illumination; Diesel combustion

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Viera Sotillo, A. A. (2019). Effect of multiple injection strategies on the Diesel spray formation and combustion using optical diagnostics . (Doctoral Dissertation). Universitat Politècnica de València. Retrieved from http://hdl.handle.net/10251/123954

Chicago Manual of Style (16^th Edition):

Viera Sotillo, Alberto Antonio. “Effect of multiple injection strategies on the Diesel spray formation and combustion using optical diagnostics .” 2019. Doctoral Dissertation, Universitat Politècnica de València. Accessed April 14, 2021. http://hdl.handle.net/10251/123954.

MLA Handbook (7^th Edition):

Viera Sotillo, Alberto Antonio. “Effect of multiple injection strategies on the Diesel spray formation and combustion using optical diagnostics .” 2019. Web. 14 Apr 2021.

Vancouver:

Viera Sotillo AA. Effect of multiple injection strategies on the Diesel spray formation and combustion using optical diagnostics . [Internet] [Doctoral dissertation]. Universitat Politècnica de València; 2019. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/10251/123954.

Council of Science Editors:

Viera Sotillo AA. Effect of multiple injection strategies on the Diesel spray formation and combustion using optical diagnostics . [Doctoral Dissertation]. Universitat Politècnica de València; 2019. Available from: http://hdl.handle.net/10251/123954

29. Almeida, Igor Raniê Soares de [UNESP]. Desenvolvimento de uma metodologia para o projeto mecânico de um bloco de motor.

Degree: 2016, Universidade Estadual Paulista (UNESP)

URL: http://hdl.handle.net/11449/144342

►

Submitted by IGOR RANIÊ SOARES DE ALMEIDA null ([email protected]) on 2016-10-06T14:43:05Z No. of bitstreams: 1 ALMEIDA_IRS_ME_GUARA - DISSERTAÇÃO.pdf: 15313376 bytes, checksum: 18d93699ff19c9c948547b05bfbe3cdc (MD5)

Approved for… (more)

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Submitted by IGOR RANIÊ SOARES DE ALMEIDA null ([email protected]) on 2016-10-06T14:43:05Z No. of bitstreams: 1 ALMEIDA_IRS_ME_GUARA - DISSERTAÇÃO.pdf: 15313376 bytes, checksum: 18d93699ff19c9c948547b05bfbe3cdc (MD5)

Approved for entry into archive by Juliano Benedito Ferreira ([email protected]) on 2016-10-11T12:50:26Z (GMT) No. of bitstreams: 1 almeida_irs_me_guara.pdf: 15313376 bytes, checksum: 18d93699ff19c9c948547b05bfbe3cdc (MD5)

Made available in DSpace on 2016-10-11T12:50:26Z (GMT). No. of bitstreams: 1 almeida_irs_me_guara.pdf: 15313376 bytes, checksum: 18d93699ff19c9c948547b05bfbe3cdc (MD5) Previous issue date: 2016-08-08

O MCI (Motor de Combustão Interna) é um produto largamente utilizado na indústria, o que o torna um objeto interessante de estudo, o qual requer constante desenvolvimento com implementação de novas tecnologias. Buscando contribuir para o avanço tecnológico na área, foi realizado um estudo do comportamento estrutural de uma de suas principais peças o bloco de cilindros. O mesmo é responsável pela união de todos os outros elementos, devendo ser suficientemente rígido para absorver os esforços oriundos da explosão no interior da câmara e resultantes das forças de oscilação de primeira e segunda ordem originárias das massas dos elementos oscilatórios do motor. Nesta dissertação desejando definir o carregamento principal sobre o bloco do motor, foram realizados diversos estudos, dentre eles: a regulagem da carga onde analisa-se analiticamente as transferências de gases que circulam em um motor, também foi realizada uma análise estequiométrica do combustível, determinando a sua composição e seu poder calorífico, na sequência foram determinados os parâmetros que caracterizam um motor, definidos aqui como cálculos de desempenho, estes foram inter-relacionados em uma planilha de Excel. Posteriormente o carregamento principal do bloco foi definido, realizando estudos de casos, com influência sobre a pressão de trabalho dos cilindros, dividindo-os em fatores de carga. A modelagem do bloco foi realizada no software Autodesk Inventor 2012, as dimensões e posicionamentos das partes foram definidas segundo a realização de cálculos e dimensões de projeto como: cálculos de tração nas roscas do cabeçote e dos mancais do motor; medidas de diâmetro e curso dos pistões; cálculos da velocidade média dos pistões, distâncias das engrenagens de distribuição e relações de cálculo como o raio da manivela sobre o comprimento da biela. Como resultado da modelagem obteve-se um sólido 3D o qual foi analisado no software Ansys Work Bench versão V12, definido o carregamento total sobre o bloco, ao final obteve-se uma análise gráfica dos deslocamentos totais, das tensões equivalentes, cortantes, normais e uma análise de fadiga do bloco do motor e sua capa do mancal, obtendo uma resposta estrutural direta para os cálculos analíticos de desempenho e os estudos de caso.

The ICM (Internal Combustion Engine) is a product widely used in the industry, which…

Advisors/Committee Members: Universidade Estadual Paulista (UNESP), Silva, Fernando de Azevedo [UNESP].

Subjects/Keywords: Motor Diesel; Bloco de cilindros; Projeto Mecânico; Combustão; Diesel Engine; Cylinder Block; Mechanical Project; Combustion

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Almeida, I. R. S. d. [. (2016). Desenvolvimento de uma metodologia para o projeto mecânico de um bloco de motor. (Masters Thesis). Universidade Estadual Paulista (UNESP). Retrieved from http://hdl.handle.net/11449/144342

Chicago Manual of Style (16^th Edition):

Almeida, Igor Raniê Soares de [UNESP]. “Desenvolvimento de uma metodologia para o projeto mecânico de um bloco de motor.” 2016. Masters Thesis, Universidade Estadual Paulista (UNESP). Accessed April 14, 2021. http://hdl.handle.net/11449/144342.

MLA Handbook (7^th Edition):

Almeida, Igor Raniê Soares de [UNESP]. “Desenvolvimento de uma metodologia para o projeto mecânico de um bloco de motor.” 2016. Web. 14 Apr 2021.

Vancouver:

Almeida IRSd[. Desenvolvimento de uma metodologia para o projeto mecânico de um bloco de motor. [Internet] [Masters thesis]. Universidade Estadual Paulista (UNESP); 2016. [cited 2021 Apr 14]. Available from: http://hdl.handle.net/11449/144342.

Council of Science Editors:

Almeida IRSd[. Desenvolvimento de uma metodologia para o projeto mecânico de um bloco de motor. [Masters Thesis]. Universidade Estadual Paulista (UNESP); 2016. Available from: http://hdl.handle.net/11449/144342

Universidade Estadual de Campinas

30. Moretti, Ricardo Roquetto, 1982-. Mistura diesel, biodiesel e etanol anidro : uma possibilidade para reduzir o custo de produção da cadeia da cana-de-açúcar.

Degree: Faculdade de Engenharia Mecânica; Programa de Pós-Graduação em Engenharia Mecânica, 2013, Universidade Estadual de Campinas

URL: MORETTI, Ricardo Roquetto. Mistura diesel, biodiesel e etanol anidro: uma possibilidade para reduzir o custo de produção da cadeia da cana-de-açúcar. 2013. 83 f. Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica, Campinas, SP. Disponível em: <http://www.repositorio.unicamp.br/handle/REPOSIP/264671>. Acesso em: 23 ago. 2018. ; http://repositorio.unicamp.br/jspui/handle/REPOSIP/264671

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Orientador: Waldir Antonio Bizzo

Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica

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Orientador: Waldir Antonio Bizzo

Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica

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Resumo: A emissão de poluentes por veículos automotores é um dos grandes problemas ambientais enfrentados na atualidade. Para resolver o problema de emissão de poluentes à modificação da matriz energética foi o caminho adotado, e para isso realizaram-se investimentos em tecnologias para fabricação de motores com melhor eficiência térmica e capazes de operar com biocombustíveis. No Brasil etanol foi o combustível objeto de estudo para realizar a mudança na matriz energética, por ser um produto produzido em larga escala no Brasil. Durante o estudo realizou-se uma revisão bibliográfica sobre os processos de produção de etanol, biodiesel e óleos vegetais. Avaliou-se a viabilidade técnica e financeira de se utilizar uma mistura de combustível óleo diesel, biodiesel versus o desempenho da mistura óleo diesel, biodiesel e etanol anidro em um motor de ignição por compressão visando não acarretar perda de performance no motor. Para a avaliação do desempenho global do motor utilizou-se um motor ciclo diesel comercial, operando com 95% de óleo diesel e 5% biodiesel e comparou-se esse mesmo motor utilizando uma mistura de 92,15% de óleo diesel, 4,85% de biodiesel e 3% de etanol anidro

This work investigated the feasibility of using a blend of standard Brazilian diesel (which contains 5% biodiesel) and up to 5% ethanol. We characterized the mixture as fuel and measured the performance of a diesel engine operating with a blend containing 3% anhydrous ethanol, the maximum percentage of ethanol that did not reduce the cetane number of the fuel below that specified in Brazilian legislation (ANP Resolution 42). The presence of anhydrous ethanol in the mixture did not cause a significant impact on engine performance as measured by brake power, brake torque and brake specific fuel consumption tests. The thermal efficiency of the engine used in the tests was slightly higher with standard diesel than with the diesel-biodiesel-ethanol blend

Mestrado

Termica e Fluidos

Mestre em Engenharia Mecânica

Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS, Bizzo, Waldir Antônio, 1955-, Gallo, Waldyr Luiz Ribeiro, Nigro, Francisco Emilio Baccaro.

Subjects/Keywords: Motores - Combustão; Etanol; Combustíveis diesel; Mistura (Quimica); Biodiesel; Engine - combustion; Ethanol; Diesel fuels; Blending; Biodiesel

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APA (6^th Edition):

Moretti, Ricardo Roquetto, 1. (2013). Mistura diesel, biodiesel e etanol anidro : uma possibilidade para reduzir o custo de produção da cadeia da cana-de-açúcar. (Masters Thesis). Universidade Estadual de Campinas. Retrieved from MORETTI, Ricardo Roquetto. Mistura diesel, biodiesel e etanol anidro: uma possibilidade para reduzir o custo de produção da cadeia da cana-de-açúcar. 2013. 83 f. Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica, Campinas, SP. Disponível em: <http://www.repositorio.unicamp.br/handle/REPOSIP/264671>. Acesso em: 23 ago. 2018. ; http://repositorio.unicamp.br/jspui/handle/REPOSIP/264671

Chicago Manual of Style (16^th Edition):

Moretti, Ricardo Roquetto, 1982-. “Mistura diesel, biodiesel e etanol anidro : uma possibilidade para reduzir o custo de produção da cadeia da cana-de-açúcar.” 2013. Masters Thesis, Universidade Estadual de Campinas. Accessed April 14, 2021. MORETTI, Ricardo Roquetto. Mistura diesel, biodiesel e etanol anidro: uma possibilidade para reduzir o custo de produção da cadeia da cana-de-açúcar. 2013. 83 f. Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica, Campinas, SP. Disponível em: <http://www.repositorio.unicamp.br/handle/REPOSIP/264671>. Acesso em: 23 ago. 2018. ; http://repositorio.unicamp.br/jspui/handle/REPOSIP/264671.

MLA Handbook (7^th Edition):

Moretti, Ricardo Roquetto, 1982-. “Mistura diesel, biodiesel e etanol anidro : uma possibilidade para reduzir o custo de produção da cadeia da cana-de-açúcar.” 2013. Web. 14 Apr 2021.

Vancouver:

Moretti, Ricardo Roquetto 1. Mistura diesel, biodiesel e etanol anidro : uma possibilidade para reduzir o custo de produção da cadeia da cana-de-açúcar. [Internet] [Masters thesis]. Universidade Estadual de Campinas; 2013. [cited 2021 Apr 14]. Available from: MORETTI, Ricardo Roquetto. Mistura diesel, biodiesel e etanol anidro: uma possibilidade para reduzir o custo de produção da cadeia da cana-de-açúcar. 2013. 83 f. Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica, Campinas, SP. Disponível em: <http://www.repositorio.unicamp.br/handle/REPOSIP/264671>. Acesso em: 23 ago. 2018. ; http://repositorio.unicamp.br/jspui/handle/REPOSIP/264671.

Council of Science Editors:

Moretti, Ricardo Roquetto 1. Mistura diesel, biodiesel e etanol anidro : uma possibilidade para reduzir o custo de produção da cadeia da cana-de-açúcar. [Masters Thesis]. Universidade Estadual de Campinas; 2013. Available from: MORETTI, Ricardo Roquetto. Mistura diesel, biodiesel e etanol anidro: uma possibilidade para reduzir o custo de produção da cadeia da cana-de-açúcar. 2013. 83 f. Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica, Campinas, SP. Disponível em: <http://www.repositorio.unicamp.br/handle/REPOSIP/264671>. Acesso em: 23 ago. 2018. ; http://repositorio.unicamp.br/jspui/handle/REPOSIP/264671

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