subject:(downforce)

Kansas State University

1. Zeller, Jonathan. Mobile soil bin development and testing.

Degree: MS, Department of Biological & Agricultural Engineering, 2018, Kansas State University

URL: http://hdl.handle.net/2097/39298

► In 2050 the world’s population is projected to be over 9 billion people, creating a need for more agriculture production than ever before. One way… (more)

Subjects/Keywords: Design; Tillage; Planting; Downforce; Draft

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APA (6^th Edition):

Zeller, J. (2018). Mobile soil bin development and testing. (Masters Thesis). Kansas State University. Retrieved from http://hdl.handle.net/2097/39298

Chicago Manual of Style (16^th Edition):

Zeller, Jonathan. “Mobile soil bin development and testing.” 2018. Masters Thesis, Kansas State University. Accessed March 08, 2021. http://hdl.handle.net/2097/39298.

MLA Handbook (7^th Edition):

Zeller, Jonathan. “Mobile soil bin development and testing.” 2018. Web. 08 Mar 2021.

Vancouver:

Zeller J. Mobile soil bin development and testing. [Internet] [Masters thesis]. Kansas State University; 2018. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/2097/39298.

Council of Science Editors:

Zeller J. Mobile soil bin development and testing. [Masters Thesis]. Kansas State University; 2018. Available from: http://hdl.handle.net/2097/39298

Kansas State University

2. Strasser, Ryan Scott. Development of a test stand for the evaluation of row crop planter automatic downforce systems and the evaluation of a row crop planter electronic drive singulation seed meter.

Degree: MS, Department of Biological & Agricultural Engineering, 2017, Kansas State University

URL: http://hdl.handle.net/2097/36243

► In recent years, the technology employed on precision row-crop planters has rapidly advanced. These new technologies include automatic downforce control systems and electronic drive singulation… (more)

▼ In recent years, the technology employed on precision row-crop planters has rapidly advanced. These new technologies include automatic downforce control systems and electronic drive singulation seed meters. These new technologies offer producers higher productivity through high speed planting and increased yield potentials through accurate seed spacing and placement. To begin to understand the benefits and performance of these new technologies, research must be conducted that specifically targets these new systems. With this research, producers would be able to better select equipment for their operation and have a deeper understanding of proper system operation and settings. A test stand, of a scissor-lift type design, was developed to evaluate row crop planter automatic downforce systems. Evaluation of a planter’s automatic downforce system is important for understanding the planter’s capability of maintaining target seeding depth throughout varying field conditions. The test stand consists of a horizontal platform that can raise and lower to simulate terrain changes as well as a mechanism to load the planter row unit’s opening discs to simulate varying soil texture. The vertical height of the test stand and the disc load can be varied in real-time based on utilizing real-world scenarios under simulated conditions to evaluate downforce system response. The stand incorporated several sensors to obtain the overall applied downforce, applied disc load, applied gauge wheel load, and hydraulic pressure. The test stand’s capabilities were evaluated and found to be satisfactory for planter downforce system testing. The test stand was then used to evaluate a commercial automatic downforce system when operating under simulated field conditions. Field data was used to create simulations representing soil type changes, planter operating speed changes, and extreme conditions such as a hard, packed clay or rocky soil type. It was found that the evaluated downforce system was able to maintain target gauge wheel load to within ±223 N for at least 94% of the time during all simulations. This would suggest that the planter would be able to maintain target seeding depth for at least 94% of field operations. Another key aspect for precision agricultural planters is to achieve accurate seed spacing at varying speeds. An electronic drive singulation seed metering system was evaluated to gather the meter’s effectiveness for high speed planting during straight and contour farming mode using simulated field conditions. The simulated conditions were used to gather the meter’s response when encountering high planting speeds, accelerations, decelerations, point-rows, and contours. These meters were found to be highly accurate, with less than 1.5% error in target seed meter speed during all simulated conditions. The meters were also found to have a response time that was always 0.34 seconds or less for all simulated conditions. Advisors/Committee Members: Ajay Sharda.

Subjects/Keywords: Precision agriculture; Downforce; Seed meter

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APA (6^th Edition):

Strasser, R. S. (2017). Development of a test stand for the evaluation of row crop planter automatic downforce systems and the evaluation of a row crop planter electronic drive singulation seed meter. (Masters Thesis). Kansas State University. Retrieved from http://hdl.handle.net/2097/36243

Chicago Manual of Style (16^th Edition):

Strasser, Ryan Scott. “Development of a test stand for the evaluation of row crop planter automatic downforce systems and the evaluation of a row crop planter electronic drive singulation seed meter.” 2017. Masters Thesis, Kansas State University. Accessed March 08, 2021. http://hdl.handle.net/2097/36243.

MLA Handbook (7^th Edition):

Strasser, Ryan Scott. “Development of a test stand for the evaluation of row crop planter automatic downforce systems and the evaluation of a row crop planter electronic drive singulation seed meter.” 2017. Web. 08 Mar 2021.

Vancouver:

Strasser RS. Development of a test stand for the evaluation of row crop planter automatic downforce systems and the evaluation of a row crop planter electronic drive singulation seed meter. [Internet] [Masters thesis]. Kansas State University; 2017. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/2097/36243.

Council of Science Editors:

Strasser RS. Development of a test stand for the evaluation of row crop planter automatic downforce systems and the evaluation of a row crop planter electronic drive singulation seed meter. [Masters Thesis]. Kansas State University; 2017. Available from: http://hdl.handle.net/2097/36243

Kansas State University

3. Badua, Sylvester Alfredo. Control system response for seed placement accuracy on row crop planters.

Degree: PhD, Department of Biological & Agricultural Engineering, 2020, Kansas State University

URL: http://hdl.handle.net/2097/40628

► Planting is one of the most critical field operations that can highly influence early season vigor, final plant density and ultimately potential crop yield. It… (more)

▼ Planting is one of the most critical field operations that can highly influence early season vigor, final plant density and ultimately potential crop yield. It is the opportunity to place seeds at a uniform depth and spacing providing them the ideal environment for proper growth and development. However, inherent field spatial variability could influence seed placement and requires proper implementation of planter settings to prevent shallow seeding depth, sidewall compaction and uneven spacing. The overall goal of this research is to evaluate the response of the planter and crop to downforce control system implementation across a wide range of machine and field operating conditions. Planting operations were performed in corn production fields using a Horsch row-crop planter with 12 row units equipped with a hydraulic downforce system capable of implementing fixed and active downforce settings. A custom-made data acquisition system was developed to record sensor data at 10 Hz sampling frequency. From this study, the following conclusions were drawn. First, soil texture and soil compaction due to tractor tires influenced real-time gauge wheel load (GWL). Implementing a fixed downforce setting with target GWL set at 35 kg showed that 25% of the total planting time GWL was less than 0 suggesting areas planted with uncertain seeding depth due to potential loss of ground contact of the gauge wheels. Likewise, fewer row units per section could provide lower variability in GWL indicating the need for an automatic section control to maintain target GWL within an acceptable range for all row units. Second, implementing an active downforce setting showed no significant difference between downforce A (63 kg) and downforce B (100 kg) on plant spacing, although downforce setting B resulted to higher plant spacing accuracy. Higher variability in spacing was observed when ground speed is over 12 kph. To achieve desired seeding depth, downforce greater than 100 kg is needed when ground speed is over 7.2 kph on no-till field and when ground speed is over 12 kph on strip-tilled field. Third, response of row units segregated in sections revealed that row unit acceleration on wing, track and non-track sections increases with speed. Strip-tilled soil exhibited lower row unit acceleration by 18% compared to no-till soil. Finally, a proof-of-concept sensing and measurement (SAM) system was developed to calculate seed spacing, depth and geo-location of corn. This system could provide real-time feedback on seed spacing and depth allowing appropriate downforce control system management for more consistent seed placement during planting. In summary, advances in planter technology paved the way for the addition of more row units across on the planter to increase planting productivity. With increasing width of planter toolbar, each row unit may need different downforce control to varying field and machine operating conditions. Appropriate downforce control management should be implemented to compensate for increased dynamics of planter row… Advisors/Committee Members: Ajay Sharda.

Subjects/Keywords: Control system; Planter downforce; Uniform seed placement; Gauge wheel load

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APA (6^th Edition):

Badua, S. A. (2020). Control system response for seed placement accuracy on row crop planters. (Doctoral Dissertation). Kansas State University. Retrieved from http://hdl.handle.net/2097/40628

Chicago Manual of Style (16^th Edition):

Badua, Sylvester Alfredo. “Control system response for seed placement accuracy on row crop planters.” 2020. Doctoral Dissertation, Kansas State University. Accessed March 08, 2021. http://hdl.handle.net/2097/40628.

MLA Handbook (7^th Edition):

Badua, Sylvester Alfredo. “Control system response for seed placement accuracy on row crop planters.” 2020. Web. 08 Mar 2021.

Vancouver:

Badua SA. Control system response for seed placement accuracy on row crop planters. [Internet] [Doctoral dissertation]. Kansas State University; 2020. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/2097/40628.

Council of Science Editors:

Badua SA. Control system response for seed placement accuracy on row crop planters. [Doctoral Dissertation]. Kansas State University; 2020. Available from: http://hdl.handle.net/2097/40628

Cranfield University

4. Ehirim, O H. Aerodynamics and performance enhancement of a ground-effect diffuser.

Degree: 2018, Cranfield University

URL: http://dspace.lib.cranfield.ac.uk/handle/1826/13211

► This study involved experimental and equivalent computational investigations into the automobile-type 3―D flow physics of a diffuser bluff body in ground-effect and novel passive flow-control… (more)

▼ This study involved experimental and equivalent computational investigations into the automobile-type 3―D flow physics of a diffuser bluff body in ground-effect and novel passive flow-control methods applied to the diffuser flow to enhance the diffuser’s aerodynamic performance. The bluff body used in this study is an Ahmed-like body employed in an inverted position with the slanted section together with the addition of side plates along both sides forming the ramped diffuser section. The first part of the study confirmed reported observations from previous studies that the downforce generated by the diffuser in proximity to a ground plane is influenced by the peak suction at the diffuser inlet and subsequent static pressure-recovery towards the diffuser exit. Also, when the bluff body ride height is gradually reduced from high to low, the diffuser flow as indicated by its force curve and surface flow features undergoes four distinct flow regimes (types A to D). The types A and B regimes are reasonably symmetrical, made up of two low-pressure core longitudinal vortices travelling along both sides of the diffuser length and they increase downforce and drag with reducing ride height. However, below the ride heights of the type B regime, types C and D regimes are asymmetrical because of the breakdown of one vortex; consequently a significant loss in downforce and drag occurs. The second part of the study involved the use ― near the diffuser exit ― of a convex bump on the diffuser ramp surface and an inverted wing between the diffuser side plates as passive flow control devices. The modification of the diffuser geometry with these devices employed individually or in combination, induced a second-stage pressure-drop and recovery near the diffuser exit. This behaviour was due to the radial pressure gradient induced on the diffuser flow by the suction surface ii curvature of the passive devices. As a result of this aerodynamic phenomenon, the diffuser generated across the flow regimes additional downforce, and a marginal increase in drag due to the profile drag induced by the devices.

Subjects/Keywords: Ground-effect; Aerodynamics; Diffuser; Passive flow control; Inverted wing; Convex bump; Downforce; Drag

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APA (6^th Edition):

Ehirim, O. H. (2018). Aerodynamics and performance enhancement of a ground-effect diffuser. (Thesis). Cranfield University. Retrieved from http://dspace.lib.cranfield.ac.uk/handle/1826/13211

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):

Ehirim, O H. “Aerodynamics and performance enhancement of a ground-effect diffuser.” 2018. Thesis, Cranfield University. Accessed March 08, 2021. http://dspace.lib.cranfield.ac.uk/handle/1826/13211.

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

MLA Handbook (7^th Edition):

Ehirim, O H. “Aerodynamics and performance enhancement of a ground-effect diffuser.” 2018. Web. 08 Mar 2021.

Vancouver:

Ehirim OH. Aerodynamics and performance enhancement of a ground-effect diffuser. [Internet] [Thesis]. Cranfield University; 2018. [cited 2021 Mar 08]. Available from: http://dspace.lib.cranfield.ac.uk/handle/1826/13211.

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

Council of Science Editors:

Ehirim OH. Aerodynamics and performance enhancement of a ground-effect diffuser. [Thesis]. Cranfield University; 2018. Available from: http://dspace.lib.cranfield.ac.uk/handle/1826/13211

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

Brno University of Technology

5. Martínek, Tomáš. Aerodynamická řešení podlah závodních vozů: Aerodynamics of race car underbodies.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/62306

► The aim of this bachelor thesis is clarifying principle of downforce, which is originating by ground effect. The thesis consists of theoretic description of this… (more)

Subjects/Keywords: aerodynamika vozidel; přísavný efekt; vztlak; přítlak; odpor; automotive aerodynamics; ground effect; lift; downforce; drag

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APA (6^th Edition):

Martínek, T. (2019). Aerodynamická řešení podlah závodních vozů: Aerodynamics of race car underbodies. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/62306

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):

Martínek, Tomáš. “Aerodynamická řešení podlah závodních vozů: Aerodynamics of race car underbodies.” 2019. Thesis, Brno University of Technology. Accessed March 08, 2021. http://hdl.handle.net/11012/62306.

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

MLA Handbook (7^th Edition):

Martínek, Tomáš. “Aerodynamická řešení podlah závodních vozů: Aerodynamics of race car underbodies.” 2019. Web. 08 Mar 2021.

Vancouver:

Martínek T. Aerodynamická řešení podlah závodních vozů: Aerodynamics of race car underbodies. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/11012/62306.

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

Council of Science Editors:

Martínek T. Aerodynamická řešení podlah závodních vozů: Aerodynamics of race car underbodies. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/62306

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

Brno University of Technology

6. Mlčoch, Pavel. Přísavný efekt v motorsportu: Ground effect in motorsport.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/23459

► This bachelor thesis describes ground effect, its influence on car aerodynamics and its use in motorsport. The thesis describes the dependence of downforce created by… (more)

Subjects/Keywords: aerodynamika vozidel; aerodynamické síly; přísavný efekt; přítlak; automotive aerodynamics; aerodynamic forces; ground effect; downforce

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APA (6^th Edition):

Mlčoch, P. (2019). Přísavný efekt v motorsportu: Ground effect in motorsport. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/23459

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):

Mlčoch, Pavel. “Přísavný efekt v motorsportu: Ground effect in motorsport.” 2019. Thesis, Brno University of Technology. Accessed March 08, 2021. http://hdl.handle.net/11012/23459.

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

MLA Handbook (7^th Edition):

Mlčoch, Pavel. “Přísavný efekt v motorsportu: Ground effect in motorsport.” 2019. Web. 08 Mar 2021.

Vancouver:

Mlčoch P. Přísavný efekt v motorsportu: Ground effect in motorsport. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/11012/23459.

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

Council of Science Editors:

Mlčoch P. Přísavný efekt v motorsportu: Ground effect in motorsport. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/23459

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

Brno University of Technology

7. Job, Štefan. Experimentální měření aerodynamických silových účinků: Experimental measurements of aerodynamic forces.

Degree: 2018, Brno University of Technology

URL: http://hdl.handle.net/11012/5043

► This thesis deals with the effect of the aerodynamic forces on a vehicle. It contains the description of the test run of the vehicle, the… (more)

Subjects/Keywords: Aerodynamika; odpory; vozidlo; přítlak; dojezdová zkouška; Aerodynamics; aerodynamic drag; vehicle; downforce; coastdown test

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APA (6^th Edition):

Job, �. (2018). Experimentální měření aerodynamických silových účinků: Experimental measurements of aerodynamic forces. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/5043

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):

Job, Štefan. “Experimentální měření aerodynamických silových účinků: Experimental measurements of aerodynamic forces.” 2018. Thesis, Brno University of Technology. Accessed March 08, 2021. http://hdl.handle.net/11012/5043.

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

MLA Handbook (7^th Edition):

Job, Štefan. “Experimentální měření aerodynamických silových účinků: Experimental measurements of aerodynamic forces.” 2018. Web. 08 Mar 2021.

Vancouver:

Job �. Experimentální měření aerodynamických silových účinků: Experimental measurements of aerodynamic forces. [Internet] [Thesis]. Brno University of Technology; 2018. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/11012/5043.

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

Council of Science Editors:

Job �. Experimentální měření aerodynamických silových účinků: Experimental measurements of aerodynamic forces. [Thesis]. Brno University of Technology; 2018. Available from: http://hdl.handle.net/11012/5043

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

Brno University of Technology

8. Martinek, Tomáš. Aerodynamická řešení podlah závodních vozů: Aerodynamics of race car underbodies.

Degree: 2016, Brno University of Technology

URL: http://hdl.handle.net/11012/60260

► The aim of this bachelor thesis is clarifying principle of downforce, which is originating by ground effect. The thesis consists of theoretic description of this… (more)

Subjects/Keywords: aerodynamika vozidel; přísavný efekt; vztlak; přítlak; odpor; automotive aerodynamics; ground effect; lift; downforce; drag

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APA (6^th Edition):

Martinek, T. (2016). Aerodynamická řešení podlah závodních vozů: Aerodynamics of race car underbodies. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/60260

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):

Martinek, Tomáš. “Aerodynamická řešení podlah závodních vozů: Aerodynamics of race car underbodies.” 2016. Thesis, Brno University of Technology. Accessed March 08, 2021. http://hdl.handle.net/11012/60260.

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

MLA Handbook (7^th Edition):

Martinek, Tomáš. “Aerodynamická řešení podlah závodních vozů: Aerodynamics of race car underbodies.” 2016. Web. 08 Mar 2021.

Vancouver:

Martinek T. Aerodynamická řešení podlah závodních vozů: Aerodynamics of race car underbodies. [Internet] [Thesis]. Brno University of Technology; 2016. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/11012/60260.

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

Council of Science Editors:

Martinek T. Aerodynamická řešení podlah závodních vozů: Aerodynamics of race car underbodies. [Thesis]. Brno University of Technology; 2016. Available from: http://hdl.handle.net/11012/60260

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

Brno University of Technology

9. Mikulášek, Miloš. Aktivní aerodynamické prvky automobilů: Active aerodynamic components of automobiles.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/32603

► This bachelor’s thesis is focused on the topic of active aerodynamic components. Bachelor’s thesis explains something about the basics of aerodynamics and generating aerodynamic forces.… (more)

Subjects/Keywords: Aktivní aerodynamické prvky; přítlak; křídlo; spoiler; Porsche 911; Active aerodynamic components; downforce; wing; spoiler; Porsche 911

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APA (6^th Edition):

Mikulášek, M. (2019). Aktivní aerodynamické prvky automobilů: Active aerodynamic components of automobiles. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/32603

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):

Mikulášek, Miloš. “Aktivní aerodynamické prvky automobilů: Active aerodynamic components of automobiles.” 2019. Thesis, Brno University of Technology. Accessed March 08, 2021. http://hdl.handle.net/11012/32603.

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

MLA Handbook (7^th Edition):

Mikulášek, Miloš. “Aktivní aerodynamické prvky automobilů: Active aerodynamic components of automobiles.” 2019. Web. 08 Mar 2021.

Vancouver:

Mikulášek M. Aktivní aerodynamické prvky automobilů: Active aerodynamic components of automobiles. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/11012/32603.

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

Council of Science Editors:

Mikulášek M. Aktivní aerodynamické prvky automobilů: Active aerodynamic components of automobiles. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/32603

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

Brno University of Technology

10. Mazáč, Petr. Aerodynamické prvky vozidel Formule 1: Aerodynamic components of Formula 1 vehicles.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/6400

► This bachelor’s thesis deals with research themed aerodynamic components of Formula 1 vehicles. The beginning of the thesis is focused on basic of aerodynamic and… (more)

Subjects/Keywords: Aerodynamika; Formule 1; proudění; aerodynamické prvky; profil křídla; historie Formule 1; přítlak; Aerodynamic; formula 1; airflow; aerodynamic components; aerofoil; history of Formula 1; downforce

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APA (6^th Edition):

Mazáč, P. (2019). Aerodynamické prvky vozidel Formule 1: Aerodynamic components of Formula 1 vehicles. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/6400

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):

Mazáč, Petr. “Aerodynamické prvky vozidel Formule 1: Aerodynamic components of Formula 1 vehicles.” 2019. Thesis, Brno University of Technology. Accessed March 08, 2021. http://hdl.handle.net/11012/6400.

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

MLA Handbook (7^th Edition):

Mazáč, Petr. “Aerodynamické prvky vozidel Formule 1: Aerodynamic components of Formula 1 vehicles.” 2019. Web. 08 Mar 2021.

Vancouver:

Mazáč P. Aerodynamické prvky vozidel Formule 1: Aerodynamic components of Formula 1 vehicles. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Mar 08]. Available from: http://hdl.handle.net/11012/6400.

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

Council of Science Editors:

Mazáč P. Aerodynamické prvky vozidel Formule 1: Aerodynamic components of Formula 1 vehicles. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/6400

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

University of New South Wales

11. Vogt, Jonathan William. An examination of ground effect phenomena and the development of ground effect induced flow separation on a downforce generating wing.

Degree: Mechanical & Manufacturing Engineering, 2010, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/45477 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:8772/SOURCE01?view=true

► 'Ground effect' is a phenomenon that can be characterised as a change in the aerodynamic behaviour of a body when it operates in close proximity… (more)

▼ 'Ground effect' is a phenomenon that can be characterised as a change in the aerodynamic behaviour of a body when it operates in close proximity to the ground. For many years, it has been exploited in the motor racing industry where inverted wings that produce beneficial downforce (negative lift) are used. Doing so allows these inverted wings to produce yet more downforce.Despite this application being utilised extensively, several aspects of how ground effect manifests about wings is still not well understood. Chief among them is how flow separation develops about inverted wings in ground effect. It has been shown previously that flow separation develops much more rapidly near the ground, however, a full explanation for how this transpires has been lacking. Additionally, an understanding of how ground effect works about differently shaped wings, and the underlying causes which generate these different behaviours, has not been elucidated.The influence of ground effect on several aerofoil and wing arrangements has been studied through various Computational Fluid Dynamics (CFD) analyses. The CFD modelling work throughout has been validated by way of moving-ground wind tunnel experimentation, using non-intrusive smoke flow visualisation and Laser Doppler Anemometry (LDA) measurement.A two-dimensional CFD investigation was undertaken to observe the ground effect behaviour about both an upright and inverted Tyrrell aerofoil, in order to clarify and differentiate the workings of ground effect for both cases. Two general mechanisms were identified in both cases: a reduction in effective angle of attack near the ground and a significant diversion of flow over the wing, when near the ground. Additional analyses on various inverted aerofoil geometries revealed that top surface camber is important in the generation of underwing suction and that a rapid upward curve on the bottom side of the aerofoil increases the effectiveness of the diffuser effect at the rear of the aerofoil.A project was undertaken to develop a CFD model which would be able to effectively model the unsteady turbulent behaviour about a quasi-two-dimensional inverted Tyrrell wing in extreme ground effect. A model which utilises span-normal periodic boundary walls was developed which offered a significant computational efficiency. Various CFD methodologies were also assessed resulting in an LES model which uses the Dynamic Smagorinsky-Lilly sub-grid turbulence model.Extensive LES simulations were conducted to model the ground effect induced flow separation that occurs on an inverted Tyrrell wing in extreme ground effect. Featuring a separation bubble near the leading edge, both a progressive and a sudden form of separation were identified. The progressive form (worsening as the ground is approached) initiated at the trailing edge and was found to be caused by the strengthening diffuser effect whose growing outlet-to-inlet ratio eventually creates a jet flow near the ground which cannot supply kinetic energy to the boundary layer. This form of separation was…

Subjects/Keywords: Ground effect; Computational Fluid Dynamics; Downforce; Negative lift; Thesis Digitisation Program

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APA (6^th Edition):

Vogt, J. W. (2010). An examination of ground effect phenomena and the development of ground effect induced flow separation on a downforce generating wing. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/45477 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:8772/SOURCE01?view=true

Chicago Manual of Style (16^th Edition):

Vogt, Jonathan William. “An examination of ground effect phenomena and the development of ground effect induced flow separation on a downforce generating wing.” 2010. Doctoral Dissertation, University of New South Wales. Accessed March 08, 2021. http://handle.unsw.edu.au/1959.4/45477 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:8772/SOURCE01?view=true.

MLA Handbook (7^th Edition):

Vogt, Jonathan William. “An examination of ground effect phenomena and the development of ground effect induced flow separation on a downforce generating wing.” 2010. Web. 08 Mar 2021.

Vancouver:

Vogt JW. An examination of ground effect phenomena and the development of ground effect induced flow separation on a downforce generating wing. [Internet] [Doctoral dissertation]. University of New South Wales; 2010. [cited 2021 Mar 08]. Available from: http://handle.unsw.edu.au/1959.4/45477 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:8772/SOURCE01?view=true.

Council of Science Editors:

Vogt JW. An examination of ground effect phenomena and the development of ground effect induced flow separation on a downforce generating wing. [Doctoral Dissertation]. University of New South Wales; 2010. Available from: http://handle.unsw.edu.au/1959.4/45477 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:8772/SOURCE01?view=true

12. Correia, João P. S . Estudo numérico de uma asa CDG para fórmula 1.

Degree: 2008, RCAAP

URL: https://www.rcaap.pt/detail.jsp?id=oai:ubibliorum.ubi.pt:10400.6/3650

► A Fórmula 1 é um desporto motorizado onde a aerodinâmica desempenha um importante papel, obrigando a que as equipas gastem milhões de dólares anualmente de… (more)

Subjects/Keywords: Aerodinâmica - Competição automóvel; Aerodinâmica - Downforce; Resistência aerodinâmica; Aerodinâmica - Fórmula 1; Asa CDG - Fórmula 1

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

APA (6^th Edition):

Correia, J. P. S. (2008). Estudo numérico de uma asa CDG para fórmula 1. (Thesis). RCAAP. Retrieved from https://www.rcaap.pt/detail.jsp?id=oai:ubibliorum.ubi.pt:10400.6/3650

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):

Correia, João P S. “Estudo numérico de uma asa CDG para fórmula 1.” 2008. Thesis, RCAAP. Accessed March 08, 2021. https://www.rcaap.pt/detail.jsp?id=oai:ubibliorum.ubi.pt:10400.6/3650.

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

MLA Handbook (7^th Edition):

Correia, João P S. “Estudo numérico de uma asa CDG para fórmula 1.” 2008. Web. 08 Mar 2021.

Vancouver:

Correia JPS. Estudo numérico de uma asa CDG para fórmula 1. [Internet] [Thesis]. RCAAP; 2008. [cited 2021 Mar 08]. Available from: https://www.rcaap.pt/detail.jsp?id=oai:ubibliorum.ubi.pt:10400.6/3650.

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

Council of Science Editors:

Correia JPS. Estudo numérico de uma asa CDG para fórmula 1. [Thesis]. RCAAP; 2008. Available from: https://www.rcaap.pt/detail.jsp?id=oai:ubibliorum.ubi.pt:10400.6/3650

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

13. Ehirim, Obinna Hyacinth. Aerodynamics and performance enhancement of a ground-effect diffuser.

Degree: PhD, 2018, Cranfield University

URL: http://dspace.lib.cranfield.ac.uk/handle/1826/13211 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.743076

► This study involved experimental and equivalent computational investigations into the automobile-type 3―D flow physics of a diffuser bluff body in ground-effect and novel passive flow-control… (more)

▼ This study involved experimental and equivalent computational investigations into the automobile-type 3―D flow physics of a diffuser bluff body in ground-effect and novel passive flow-control methods applied to the diffuser flow to enhance the diffuser’s aerodynamic performance. The bluff body used in this study is an Ahmed-like body employed in an inverted position with the slanted section together with the addition of side plates along both sides forming the ramped diffuser section. The first part of the study confirmed reported observations from previous studies that the downforce generated by the diffuser in proximity to a ground plane is influenced by the peak suction at the diffuser inlet and subsequent static pressure-recovery towards the diffuser exit. Also, when the bluff body ride height is gradually reduced from high to low, the diffuser flow as indicated by its force curve and surface flow features undergoes four distinct flow regimes (types A to D). The types A and B regimes are reasonably symmetrical, made up of two low-pressure core longitudinal vortices travelling along both sides of the diffuser length and they increase downforce and drag with reducing ride height. However, below the ride heights of the type B regime, types C and D regimes are asymmetrical because of the breakdown of one vortex; consequently a significant loss in downforce and drag occurs. The second part of the study involved the use ― near the diffuser exit ― of a convex bump on the diffuser ramp surface and an inverted wing between the diffuser side plates as passive flow control devices. The modification of the diffuser geometry with these devices employed individually or in combination, induced a second-stage pressure-drop and recovery near the diffuser exit. This behaviour was due to the radial pressure gradient induced on the diffuser flow by the suction surface ii curvature of the passive devices. As a result of this aerodynamic phenomenon, the diffuser generated across the flow regimes additional downforce, and a marginal increase in drag due to the profile drag induced by the devices.

Subjects/Keywords: 629.132; Ground-effect; Aerodynamics; Diffuser; Passive flow control; Inverted wing; Convex bump; Downforce; Drag

…115 4.3 Baseline Downforce and Drag (CFD vs. Experiments)… …205 6.2.1 Diffuser body downforce and drag measurements… …227 6.3.1 Force measurements (downforce and drag)… …289 Appendix D ― Experimental Downforce and Drag Measurements… …6 Figure 1-3: Downforce effect on cornering speeds around a corner radius of 40 m at…

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

APA (6^th Edition):

Ehirim, O. H. (2018). Aerodynamics and performance enhancement of a ground-effect diffuser. (Doctoral Dissertation). Cranfield University. Retrieved from http://dspace.lib.cranfield.ac.uk/handle/1826/13211 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.743076

Chicago Manual of Style (16^th Edition):

Ehirim, Obinna Hyacinth. “Aerodynamics and performance enhancement of a ground-effect diffuser.” 2018. Doctoral Dissertation, Cranfield University. Accessed March 08, 2021. http://dspace.lib.cranfield.ac.uk/handle/1826/13211 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.743076.

MLA Handbook (7^th Edition):

Ehirim, Obinna Hyacinth. “Aerodynamics and performance enhancement of a ground-effect diffuser.” 2018. Web. 08 Mar 2021.

Vancouver:

Ehirim OH. Aerodynamics and performance enhancement of a ground-effect diffuser. [Internet] [Doctoral dissertation]. Cranfield University; 2018. [cited 2021 Mar 08]. Available from: http://dspace.lib.cranfield.ac.uk/handle/1826/13211 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.743076.

Council of Science Editors:

Ehirim OH. Aerodynamics and performance enhancement of a ground-effect diffuser. [Doctoral Dissertation]. Cranfield University; 2018. Available from: http://dspace.lib.cranfield.ac.uk/handle/1826/13211 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.743076

14. Lind, Jacob. Fordonsdynamiska effekter av en justerbar multi-element vinge jämfört med en single-element vinge för sportbilar - En teoretisk studie.

Degree: Design and Engineering, 2019, Mälardalen University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-42719

► Sportbilsbranchen har utvecklats i flera decennier och det råder en konstant efterfrågan för nya idéer och teknologier som kan förbättra sportbilar. Detta stämmer framförallt… (more)

▼ Sportbilsbranchen har utvecklats i flera decennier och det råder en konstant efterfrågan för nya idéer och teknologier som kan förbättra sportbilar. Detta stämmer framförallt in inom superbilsbranchen, där det är en stor konkurrens mellan företag om vem som först utvecklar nya teknologier som gör deras bilar till de attraktivaste på marknaden. Ett område inom fordonsutvecklingen är aerodynamik och dess användning för att förbättra fordons prestanda vid körning i raksträckor och i kurvor. Sportbilstillverkarnas mål är oftast att utveckla fordon till att accelerera snabbt, nå en hög topphastighet, kort bromssträcka samt att nå så hög hastighet som möjligt i kurvor utan att glida av vägen. Det finns flera metoder för att uppnå detta, men det sätt som behandlas i denna rapport är anvädningen av bakvingar. Bakvingar förekommer i flera konfigurationer och modifikationer för att uppfylla användarens önskemål och krav. De vingkonfigurationer som behandlas i detta projekt är single- och multi-elementa vingar. Single-elementa vingar kännetecknas av att de består av en enkel vingarea. Fördelen med dessa konfigurationer är att de producerar låga luftmotstånd vid låga anfallsvinklar, vilket bland annat gör dem optimala för höga hastigheter. Multi-elementa vingar består av två eller fler vingareor. I och med detta kan en större negativ lyftkraft uppnås vilket gör dem optimala vid svängning. Multi-elementa vingar kan även användas vid högre anfallsvinklar med en minskad risk att turbulens uppstår. Syftet i detta projekt var att ge en teoretisk analys av vad som kan uppnås om en single- och multi-element vinge kombineras i en och samma konfiguration. Tanken är att i praktiken har denna kombinerade vingkonfiguration en klaff som kan fällas ut för att kunna utnyttja båda vingkonfigurationernas fördelar och på så sätt förbättra sportbilars acceleration, topphastighet, bromsningsförmåga samt svängningshastighet. Metoden bestod av att använda teoretiska beräkningar och analyser för att nå slutsatser om en sådan typ av vinge skulle vara fördelaktig, eller om de existerande konfigurationerna är tillräckliga. Detta gjordes genom att använda en tidigare analys som undersökte kraftskillnaderna hos en single- och multi-element vinge med samma dimensioner. Med vingarnas data kunde beräkningar genomföras på ett typfordon, där resultaten av vingarnas påverkan på fordonets topphastighet, acceleration, bromsning och kurvkörning samlades in och jämfördes. Med dessa jämförelser kunde en slutsats dras om vilka vingkonfigurationer som visade bäst resultat vid de olika situationerna. Resultatet visar att en vinge som är en kombination av single- och multi-element kan vara fördelaktig över existerande konfigurationer. I och med att den single-elementa vingen har lägst luftmotstånd så passar den bäst vid acceleration vid hög hastighet samt för att uppnå höga topphastigheter. Vid acceleration i låga farter är den multi-elementa vingen mer fördelaktiga på grund av dess högre…

Subjects/Keywords: DRS; bakvinge; justerbar; single-element; multi-element; fordonsdynamik; fordonsmekanik; sportbilar; superbilar; klaffsystem; analys; teknik; downforce; Aerospace Engineering; Rymd- och flygteknik

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

APA (6^th Edition):

Lind, J. (2019). Fordonsdynamiska effekter av en justerbar multi-element vinge jämfört med en single-element vinge för sportbilar - En teoretisk studie. (Thesis). Mälardalen University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-42719

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):

Lind, Jacob. “Fordonsdynamiska effekter av en justerbar multi-element vinge jämfört med en single-element vinge för sportbilar - En teoretisk studie.” 2019. Thesis, Mälardalen University. Accessed March 08, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-42719.

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

MLA Handbook (7^th Edition):

Lind, Jacob. “Fordonsdynamiska effekter av en justerbar multi-element vinge jämfört med en single-element vinge för sportbilar - En teoretisk studie.” 2019. Web. 08 Mar 2021.

Vancouver:

Lind J. Fordonsdynamiska effekter av en justerbar multi-element vinge jämfört med en single-element vinge för sportbilar - En teoretisk studie. [Internet] [Thesis]. Mälardalen University; 2019. [cited 2021 Mar 08]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-42719.

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

Council of Science Editors:

Lind J. Fordonsdynamiska effekter av en justerbar multi-element vinge jämfört med en single-element vinge för sportbilar - En teoretisk studie. [Thesis]. Mälardalen University; 2019. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-42719

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

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