subject:(Explosion)

Addis Ababa University

1. Hailemariam, Ali. Solid Waste Management Problems & the Role of Stakeholders: A Case Study on Household Solid Waste Management in Arada Sub-City, Addis Ababa .

Degree: 2008, Addis Ababa University

URL: http://etd.aau.edu.et/dspace/handle/123456789/5076

► Population explosion and the associated anthropogenic activities generate huge amounts of different wastes that adversely affect the physical environment of Addis Ababa City. This situation… (more)

▼ Population explosion and the associated anthropogenic activities generate huge amounts of different wastes that adversely affect the physical environment of Addis Ababa City. This situation is not different for Arada Sub-city, which is one of the oldest and the central part of the city, where the concern of this study has focused. The current estimated population of the subcity is 350,000 people. The sub-city has been established as part and parcel of the city in 2003 and has got a wide range of power and various urban service activities to be provided for the residents. Often a discrepancy exists between the growing population and the increasing demand for the urban services on one hand and the capacity of the local government to provide these services on the other hand. This study has focused on, household solid waste management service delivery, one of the urban services provided by the sub-city and the role of the stakeholders in this particular activity. In this study, both quantitative and qualitative descriptions were used to show the performance of the sub-city in delivery of the household solid waste management service. The role and performance of the sub-city’s agent was assessed in terms of the service it provides, institutional and resource capacity, working relations with stakeholders mainly with the MSEs, issues of awareness raising and user participation in the sub-city were attempted to be included. The findings of the study revealed that household solid waste management service in the sub-city is provided below the required quality or has a poor status. According to the survey results, the inadequate organization, lack of material and human resources, unfair distribution of containers, lack of proper support for the private sector, lack of awareness raising and community participation are some of the factors that account for poor solid waste management service delivery in the sub-city. Finally, results of the study indicate that there is so much to be done in order to improve the service provision. Thus, there is a need to create driving motives into the community to use integrated sustainable solid waste management strategies by promoting public- privatepartnership in the area of solid waste management service delivery in the sub-city. Advisors/Committee Members: Minas Hiruy (Ph.D.) (advisor).

Subjects/Keywords: Population explosion; Anthropogenic

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Hailemariam, A. (2008). Solid Waste Management Problems & the Role of Stakeholders: A Case Study on Household Solid Waste Management in Arada Sub-City, Addis Ababa . (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/5076

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):

Hailemariam, Ali. “Solid Waste Management Problems & the Role of Stakeholders: A Case Study on Household Solid Waste Management in Arada Sub-City, Addis Ababa .” 2008. Thesis, Addis Ababa University. Accessed February 25, 2021. http://etd.aau.edu.et/dspace/handle/123456789/5076.

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

MLA Handbook (7^th Edition):

Hailemariam, Ali. “Solid Waste Management Problems & the Role of Stakeholders: A Case Study on Household Solid Waste Management in Arada Sub-City, Addis Ababa .” 2008. Web. 25 Feb 2021.

Vancouver:

Hailemariam A. Solid Waste Management Problems & the Role of Stakeholders: A Case Study on Household Solid Waste Management in Arada Sub-City, Addis Ababa . [Internet] [Thesis]. Addis Ababa University; 2008. [cited 2021 Feb 25]. Available from: http://etd.aau.edu.et/dspace/handle/123456789/5076.

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

Council of Science Editors:

Hailemariam A. Solid Waste Management Problems & the Role of Stakeholders: A Case Study on Household Solid Waste Management in Arada Sub-City, Addis Ababa . [Thesis]. Addis Ababa University; 2008. Available from: http://etd.aau.edu.et/dspace/handle/123456789/5076

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

2. Pouille, Lauren. Paléobiodiversité des Radiolaires du Paléozoique inférieur (Cambrien-Ordovicien) : Aperçu à travers une étude des assemblages à radiolaires provenant des montagnes de l’Altai (Russie), d’Aksuran (Kazakstan), du bassin de Georgina (Australie) et de la Terre Neuve occidentale (Canada) : Palaeobiodiversity of Early Paleozoic Radiolaria (Cambrian-Ordovician). : Insights from a study of radiolarian assemblages from the Altai Mountains (Russia), Aksuran Mountains (Kazakhstan), Georgina Basin (Australia) and western Newfoundland (Canada).

Degree: Docteur es, Géosciences, Ecologie, Paléontologie et Océanographie, 2012, Université Lille I – Sciences et Technologies

URL: http://www.theses.fr/2012LIL10152

►

Notre compréhension de la structuration des chaînes trophiques pélagiques du Paléozoïque inférieur, mise en place lors des évènements d’« explosion Cambrienne » et de «… (more)

▼

Notre compréhension de la structuration des chaînes trophiques pélagiques du Paléozoïque inférieur, mise en place lors des évènements d’« explosion Cambrienne » et de « Grande Biodiversification Ordovicienne » et qui a abouti à la mise en place des écosystèmes marins à « caractère moderne », reste encore très fragmentaire. Nous nous intéressons ici à comprendre les origines et la dynamique de paléobiodiversité des Radiolaires polycystines, composantes biotiques clefs du plancton hétérotrophe, dans le but de mieux comprendre le calendrier et la dynamique de diversification du plancton au cours du Paléozoïque inférieur. La découverte de nouveau matériel provenant des montagnes de l’Altaï (Sibérie) apporte de nouvelles données sur l’enregistrement fossilifère des premiers radiolaires biominéralisés avec l’identification des plus anciens représentant de la famille des Archéoentactinidae d’âge Botomien. Des études menées sur du matériel de Terre-Neuve et d’Australie ont permis de caractériser l’ensemble des changements biotiques intervenus au sein des assemblages à radiolaires à l’aube de la révolution planctonique mais également de préciser la répartition paléogéographique des radiolaires au Cambrien supérieur. Une étude taxonomique menée sur un échantillon provenant du Kazakhstan a également permis la découverte d’un nouvel assemblage à radiolaire enrichissant considérablement notre connaissance de la diversité des radiolaires à l’Ordovicien moyen.

Our understanding of the structuration of Lower Paleozoic pelagic trophic chains during the ‘Cambrian Explosion’ and the ‘Great Ordovician Biodiversification Event’, which has lead to the establishment of modern marine ecosystems, is still very fragmentary. We are here interested in understanding the paleodiversity dynamics of polycystines Radiolaria planctonic group, a key biotic component of the heterotrophic plankton, in order get a better idea of the timing and dynamics of plankton diversification at the Lower Paleozoic. The discovery of new material from the Altai Mountains (Siberia) brings new data on the fossil record of the first biomineralized radiolarians with the identification of the oldest representatives of the Archeoentactinidae family dated of a Botomian age. Study conducted on Newfoundland and Australian material allowed us to characterize precisely the various biotic changes undergone by radiolarians during the Cambrian-Ordovician transition, at the dawn of the planktonic revolution but also to precise their paleogeographic distribution at the Late Cambrian. A detailed taxonomic study conducted on a Kazakhstanian sample has allowed us to describe a new radiolarian assemblage enriching considerably our knowledge on the radiolarian diversity at the middle Ordovician.

Advisors/Committee Members: Danelian, Taniel (thesis director).

Subjects/Keywords: Explosion cambrienne; 561.995

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Pouille, L. (2012). Paléobiodiversité des Radiolaires du Paléozoique inférieur (Cambrien-Ordovicien) : Aperçu à travers une étude des assemblages à radiolaires provenant des montagnes de l’Altai (Russie), d’Aksuran (Kazakstan), du bassin de Georgina (Australie) et de la Terre Neuve occidentale (Canada) : Palaeobiodiversity of Early Paleozoic Radiolaria (Cambrian-Ordovician). : Insights from a study of radiolarian assemblages from the Altai Mountains (Russia), Aksuran Mountains (Kazakhstan), Georgina Basin (Australia) and western Newfoundland (Canada). (Doctoral Dissertation). Université Lille I – Sciences et Technologies. Retrieved from http://www.theses.fr/2012LIL10152

Chicago Manual of Style (16^th Edition):

Pouille, Lauren. “Paléobiodiversité des Radiolaires du Paléozoique inférieur (Cambrien-Ordovicien) : Aperçu à travers une étude des assemblages à radiolaires provenant des montagnes de l’Altai (Russie), d’Aksuran (Kazakstan), du bassin de Georgina (Australie) et de la Terre Neuve occidentale (Canada) : Palaeobiodiversity of Early Paleozoic Radiolaria (Cambrian-Ordovician). : Insights from a study of radiolarian assemblages from the Altai Mountains (Russia), Aksuran Mountains (Kazakhstan), Georgina Basin (Australia) and western Newfoundland (Canada).” 2012. Doctoral Dissertation, Université Lille I – Sciences et Technologies. Accessed February 25, 2021. http://www.theses.fr/2012LIL10152.

MLA Handbook (7^th Edition):

Pouille, Lauren. “Paléobiodiversité des Radiolaires du Paléozoique inférieur (Cambrien-Ordovicien) : Aperçu à travers une étude des assemblages à radiolaires provenant des montagnes de l’Altai (Russie), d’Aksuran (Kazakstan), du bassin de Georgina (Australie) et de la Terre Neuve occidentale (Canada) : Palaeobiodiversity of Early Paleozoic Radiolaria (Cambrian-Ordovician). : Insights from a study of radiolarian assemblages from the Altai Mountains (Russia), Aksuran Mountains (Kazakhstan), Georgina Basin (Australia) and western Newfoundland (Canada).” 2012. Web. 25 Feb 2021.

Vancouver:

Pouille L. Paléobiodiversité des Radiolaires du Paléozoique inférieur (Cambrien-Ordovicien) : Aperçu à travers une étude des assemblages à radiolaires provenant des montagnes de l’Altai (Russie), d’Aksuran (Kazakstan), du bassin de Georgina (Australie) et de la Terre Neuve occidentale (Canada) : Palaeobiodiversity of Early Paleozoic Radiolaria (Cambrian-Ordovician). : Insights from a study of radiolarian assemblages from the Altai Mountains (Russia), Aksuran Mountains (Kazakhstan), Georgina Basin (Australia) and western Newfoundland (Canada). [Internet] [Doctoral dissertation]. Université Lille I – Sciences et Technologies; 2012. [cited 2021 Feb 25]. Available from: http://www.theses.fr/2012LIL10152.

Council of Science Editors:

Pouille L. Paléobiodiversité des Radiolaires du Paléozoique inférieur (Cambrien-Ordovicien) : Aperçu à travers une étude des assemblages à radiolaires provenant des montagnes de l’Altai (Russie), d’Aksuran (Kazakstan), du bassin de Georgina (Australie) et de la Terre Neuve occidentale (Canada) : Palaeobiodiversity of Early Paleozoic Radiolaria (Cambrian-Ordovician). : Insights from a study of radiolarian assemblages from the Altai Mountains (Russia), Aksuran Mountains (Kazakhstan), Georgina Basin (Australia) and western Newfoundland (Canada). [Doctoral Dissertation]. Université Lille I – Sciences et Technologies; 2012. Available from: http://www.theses.fr/2012LIL10152

University of Kansas

3. Reding, Nicholas. Mitigation of Metal Dust Deflagrations via Thermal Analysis and Active Explosion Suppression.

Degree: M.E., Chemical & Petroleum Engineering, 2019, University of Kansas

URL: http://hdl.handle.net/1808/30473

► Explosions induced by ignition of combustible metal powders continue to present a significant threat to metal handling and refining industries. Addition of non-combustible inert material… (more)

▼ Explosions induced by ignition of combustible metal powders continue to present a significant threat to metal handling and refining industries. Addition of non-combustible inert material to combustible dust mixtures, either through pre-mixing or high-rate injection as the incipient flame front begins to develop, is common practice for preventative inhibition or explosion protection via active suppression, respectively. Metal dusts demonstrate an extremely reactive explosion risk due to amplified heat of combustion, burning temperature, flame speed, explosibility parameters (KSt and Pmax), and ignition sensitivity. Upon ignition in a contained enclosure volume and propagation to interconnected vessels, metal dusts exhibit augmented explosion severity relative to organic fuels. Inhibition efficiency of suppressant agents utilized for active mitigation is shown to be reliant on fuel explosibility, discrete burning mechanism, and combustion temperature range, and thus may be increasingly variable depending on the fuel in question. For this reason, mitigation of metal powder deflagrations at moderate total suppressed pressures (relative to the overall strength of the enclosure) and at low agent concentrations remains challenging. The aim of this study is to propose a method for the characterization of the inhibition efficiency of five suppressant agents (sodium bicarbonate [SBC], potassium bicarbonate [PK], monoammonium phosphate [MAP], diammonium phosphate [DAP], and sodium chloride-based [Met-L-X]) when mixed with both organic (cornstarch) and metallic (zinc and iron) fuels, utilizing simultaneous thermal analysis (STA) techniques. In addition, this work validates lab-scale conclusions through metal dust suppression testing in Fike Corporation’s 1 m3 sphere combustion chamber and evaluates the efficacy of suppression agents with anticipated performance for the mitigation of iron and aluminum powder deflagrations. Advisors/Committee Members: Shiflett, Mark B. (advisor), Allgeier, Alan M. (cmtemember), Scurto, Aaron M. (cmtemember).

Subjects/Keywords: Chemical engineering; Combustion; Explosion Mitigation; Explosion Protection; Explosion Suppression; Metal Dusts; Thermal Analysis

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Reding, N. (2019). Mitigation of Metal Dust Deflagrations via Thermal Analysis and Active Explosion Suppression. (Masters Thesis). University of Kansas. Retrieved from http://hdl.handle.net/1808/30473

Chicago Manual of Style (16^th Edition):

Reding, Nicholas. “Mitigation of Metal Dust Deflagrations via Thermal Analysis and Active Explosion Suppression.” 2019. Masters Thesis, University of Kansas. Accessed February 25, 2021. http://hdl.handle.net/1808/30473.

MLA Handbook (7^th Edition):

Reding, Nicholas. “Mitigation of Metal Dust Deflagrations via Thermal Analysis and Active Explosion Suppression.” 2019. Web. 25 Feb 2021.

Vancouver:

Reding N. Mitigation of Metal Dust Deflagrations via Thermal Analysis and Active Explosion Suppression. [Internet] [Masters thesis]. University of Kansas; 2019. [cited 2021 Feb 25]. Available from: http://hdl.handle.net/1808/30473.

Council of Science Editors:

Reding N. Mitigation of Metal Dust Deflagrations via Thermal Analysis and Active Explosion Suppression. [Masters Thesis]. University of Kansas; 2019. Available from: http://hdl.handle.net/1808/30473

University of Rochester

4. Kiria-Kaiserberg, Vyacheslav. Explosion properties of stochastic differential delay equations without drift.

Degree: PhD, 2016, University of Rochester

URL: http://hdl.handle.net/1802/31482

► In this thesis we investigate the conditions which lead to explosion of Stochastic Differential Delay Equations (SDDE). SDDE's are stochastic differential equations with delay in… (more)

Subjects/Keywords: Delay equation; explosion time

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Kiria-Kaiserberg, V. (2016). Explosion properties of stochastic differential delay equations without drift. (Doctoral Dissertation). University of Rochester. Retrieved from http://hdl.handle.net/1802/31482

Chicago Manual of Style (16^th Edition):

Kiria-Kaiserberg, Vyacheslav. “Explosion properties of stochastic differential delay equations without drift.” 2016. Doctoral Dissertation, University of Rochester. Accessed February 25, 2021. http://hdl.handle.net/1802/31482.

MLA Handbook (7^th Edition):

Kiria-Kaiserberg, Vyacheslav. “Explosion properties of stochastic differential delay equations without drift.” 2016. Web. 25 Feb 2021.

Vancouver:

Kiria-Kaiserberg V. Explosion properties of stochastic differential delay equations without drift. [Internet] [Doctoral dissertation]. University of Rochester; 2016. [cited 2021 Feb 25]. Available from: http://hdl.handle.net/1802/31482.

Council of Science Editors:

Kiria-Kaiserberg V. Explosion properties of stochastic differential delay equations without drift. [Doctoral Dissertation]. University of Rochester; 2016. Available from: http://hdl.handle.net/1802/31482

Oregon State University

5. Ranjbar, Lily. A Two-element CZT-based Radioxenon Detection System for Nuclear Weapon Test Monitoring.

Degree: PhD, Radiation Health Physics, 2016, Oregon State University

URL: http://hdl.handle.net/1957/58572

► Detection of xenon radioisotopes (radioxenons) has proven to be an important method for detecting nuclear explosions and is particularly well suited for detecting undeclared underground… (more)

▼ Detection of xenon radioisotopes (radioxenons) has proven to be an important method for detecting nuclear explosions and is particularly well suited for detecting undeclared underground testing. The radioxenon isotopes ¹³¹mXe (t₁/₂ = 11.934 d), ¹³³mXe (t₁/₂ = 2.19 d), ¹³³Xe (t₁/₂ = 5.243 d) and ¹³⁵Xe (t₁/₂ = 9.14 h) are produced in significant amounts in nuclear explosions and are of particularly high-value in identifying such events and thus are the focus of current radioxenon detection systems. The main objective of this dissertation is to design, build and test a new radioxenon detection system to study the response of CdZnTe (CZT) detectors to xenon radioisotopes in order to support the CTBT for discovering clandestine nuclear weapon tests. This prototype detection system was intended to be small and compact with minimal number of channels which reduces complexity, power and size and still can achieve good energy resolution at room temperature compared with other scintillator-based radioxenon detectors. The prototype design uses two CZT crystals for this purpose, with the ultimate goal of using six CZT crystals for optimum geometric efficiency. The system measures xenon radioisotopes through beta-gamma coincidence detection between the two detection elements. The CZT-based detection system was characterized with radioactive lab sources and four radioxenons produced in the OSU's TRIGA reactor. The detection system offers excellent energy resolution and background count rate compared with scintillator-based beta-gamma coincidence detectors currently in operation at the IMS stations. The detection system was also simulated using MCNP to understand the response of the system to radioxenons of interest. PTRAC card was used for this purpose to find the track of beta/conversion electrons and gamma/X-rays in each CZT detector. The MCNP simulations were compared with the measurement results and shows very good consistency. The minimum detectable concentration (MDC) of this system for ¹³³Xe is estimated to be less than the requirement set by the IMS (1 mBq/m³). Our estimations also show that by increasing the number of CZT crystals to 6, the MDC of all radioxenons will be improved to less than 1 mBq/m³ which is comparable with the most sensitive radioxenon detection systems currently in operation. Advisors/Committee Members: Farsoni, Abi T. (advisor), Hamby, David (committee member).

Subjects/Keywords: Nuclear Explosion Monitoring; Xenon – Isotopes

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Ranjbar, L. (2016). A Two-element CZT-based Radioxenon Detection System for Nuclear Weapon Test Monitoring. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/58572

Chicago Manual of Style (16^th Edition):

Ranjbar, Lily. “A Two-element CZT-based Radioxenon Detection System for Nuclear Weapon Test Monitoring.” 2016. Doctoral Dissertation, Oregon State University. Accessed February 25, 2021. http://hdl.handle.net/1957/58572.

MLA Handbook (7^th Edition):

Ranjbar, Lily. “A Two-element CZT-based Radioxenon Detection System for Nuclear Weapon Test Monitoring.” 2016. Web. 25 Feb 2021.

Vancouver:

Ranjbar L. A Two-element CZT-based Radioxenon Detection System for Nuclear Weapon Test Monitoring. [Internet] [Doctoral dissertation]. Oregon State University; 2016. [cited 2021 Feb 25]. Available from: http://hdl.handle.net/1957/58572.

Council of Science Editors:

Ranjbar L. A Two-element CZT-based Radioxenon Detection System for Nuclear Weapon Test Monitoring. [Doctoral Dissertation]. Oregon State University; 2016. Available from: http://hdl.handle.net/1957/58572

Texas A&M University

6. Chowdhury, Amira Yousuf. Shock Interaction with Dust Layers.

Degree: PhD, Materials Science and Engineering, 2015, Texas A&M University

URL: http://hdl.handle.net/1969.1/155415

► Dust explosion hazards in areas where combustible dusts are found have caused loss of life and halted business operations in some instances. The elimination of… (more)

▼ Dust explosion hazards in areas where combustible dusts are found have caused loss of life and halted business operations in some instances. The elimination of secondary dust explosion hazards, i.e. reducing dust dispersion, can be characterized in shock-tubes to understand shock-dust interactions. For this reason, a new shock-tube test section was developed and integrated into an existing shock-tube facility. The test section has large windows to allow for the use of the shadowgraph technique to track dust-layer growth behind a passing normal shock wave, and it is designed to handle an incident shock wave up to Mach 2 to impersonate real-industry scenarios. The characterization experiments presented herein demonstrate the advantages of the authors’ test techniques toward providing new physical insights over a wider range of data than what have been available heretofore in the literature. First, the effect of shock strength on the dust entrainment process was explored by subjecting limestone dust to Mach numbers ranging from 1.10 to 1.60. Also, the effect of dust-layer thickness on the entrainment process was observed by performing tests with two different layer depths, namely 3.2- and 12.7-mm thicknesses. New data were collected to develop correlations between the shock strength and the dust entrainment height as a function of time for each layer depth. The longer observation time and higher camera framing rates led to the discovery of trends not previously observed by earlier studies, such as a clear transition time between the early, linear growth regime and a much-slower, average growth regime. This second regime is however accompanied by surface instabilities that can lead to a much larger variation in the edge of the dust layer than seen in the early growth regime. In addition, for the linear growth regime, there was no significant difference in the dust-layer height growth between the two layer thicknesses; however, the larger thickness led to higher growth rates and much larger surface instabilities at later times. Next, we conducted experiments to elucidate the effect of particle size and size polydispersity on dust cloud formation phenomena behind blast waves. Through systematic modification of the span of the particle size distribution, the striking effect of polydispersity on the entrainment process was demonstrated. Moreover, correlations between linear dust rise rate and particle size and size polydispersity have been developed. Finally, recommendations for numerical modelers of this field and NFPA 654, Standard for the Prevention of Fire and Dust Explosions from the Manufacturing, Processing, and Handling of Combustible Particulate Solids are provided for developing a better dust explosion hazard assessment tool. Advisors/Committee Members: Mannan, M. Sam (advisor), Petersen, Eric L (advisor), Cheng, Zhengdong (committee member), Jeong, Hae-Kwon (committee member).

Subjects/Keywords: Dust Explosion; Shock wave

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Chowdhury, A. Y. (2015). Shock Interaction with Dust Layers. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/155415

Chicago Manual of Style (16^th Edition):

Chowdhury, Amira Yousuf. “Shock Interaction with Dust Layers.” 2015. Doctoral Dissertation, Texas A&M University. Accessed February 25, 2021. http://hdl.handle.net/1969.1/155415.

MLA Handbook (7^th Edition):

Chowdhury, Amira Yousuf. “Shock Interaction with Dust Layers.” 2015. Web. 25 Feb 2021.

Vancouver:

Chowdhury AY. Shock Interaction with Dust Layers. [Internet] [Doctoral dissertation]. Texas A&M University; 2015. [cited 2021 Feb 25]. Available from: http://hdl.handle.net/1969.1/155415.

Council of Science Editors:

Chowdhury AY. Shock Interaction with Dust Layers. [Doctoral Dissertation]. Texas A&M University; 2015. Available from: http://hdl.handle.net/1969.1/155415

University of Toronto

7. Walker, Martin Graham. An Energy-dissipating System for Blast Mitigation in Structures.

Degree: 2012, University of Toronto

URL: http://hdl.handle.net/1807/33576

►

The design of buildings for extreme loads has traditionally been conducted on a life safety basis. As a result, buildings often need to be demolished… (more)

Subjects/Keywords: Blast; Mitigation; Explosion; 0543

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Walker, M. G. (2012). An Energy-dissipating System for Blast Mitigation in Structures. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/33576

Chicago Manual of Style (16^th Edition):

Walker, Martin Graham. “An Energy-dissipating System for Blast Mitigation in Structures.” 2012. Masters Thesis, University of Toronto. Accessed February 25, 2021. http://hdl.handle.net/1807/33576.

MLA Handbook (7^th Edition):

Walker, Martin Graham. “An Energy-dissipating System for Blast Mitigation in Structures.” 2012. Web. 25 Feb 2021.

Vancouver:

Walker MG. An Energy-dissipating System for Blast Mitigation in Structures. [Internet] [Masters thesis]. University of Toronto; 2012. [cited 2021 Feb 25]. Available from: http://hdl.handle.net/1807/33576.

Council of Science Editors:

Walker MG. An Energy-dissipating System for Blast Mitigation in Structures. [Masters Thesis]. University of Toronto; 2012. Available from: http://hdl.handle.net/1807/33576

University of Illinois – Urbana-Champaign

8. Chan, Chee Haw. Ignition limits of explosively dispersed fuel.

Degree: MS, Mechanical Engineering, 2016, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/92720

► This thesis aims to explore the ignition limits of explosively dispersed fuel. Significant damage can result from the explosive dispersal and ignition of kerosene in… (more)

Subjects/Keywords: Ignition; Explosion; Fuel; Kerosene

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Chan, C. H. (2016). Ignition limits of explosively dispersed fuel. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/92720

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):

Chan, Chee Haw. “Ignition limits of explosively dispersed fuel.” 2016. Thesis, University of Illinois – Urbana-Champaign. Accessed February 25, 2021. http://hdl.handle.net/2142/92720.

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

MLA Handbook (7^th Edition):

Chan, Chee Haw. “Ignition limits of explosively dispersed fuel.” 2016. Web. 25 Feb 2021.

Vancouver:

Chan CH. Ignition limits of explosively dispersed fuel. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2016. [cited 2021 Feb 25]. Available from: http://hdl.handle.net/2142/92720.

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

Council of Science Editors:

Chan CH. Ignition limits of explosively dispersed fuel. [Thesis]. University of Illinois – Urbana-Champaign; 2016. Available from: http://hdl.handle.net/2142/92720

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

Colorado School of Mines

9. Duncan, Nickolas A. Characterization of transport equations with forensic applications (nuclear and social).

Degree: PhD, Mechanical Engineering, 2020, Colorado School of Mines

URL: http://hdl.handle.net/11124/175337

► Convection and diffusion processes are used to understand transport in a wide range of contexts including the spread of diseases, the adoption of ideas within… (more)

▼ Convection and diffusion processes are used to understand transport in a wide range of contexts including the spread of diseases, the adoption of ideas within populations and the classical applications to heat and mass transfer. While much attention is typically paid to formulating the appropriate equations to accurately capture the underlaying processes, the parameters that go into these mathematical models are equally important and receive far less attention. The SARS-CoV-2 emerged in late 2019 and caused a worldwide pandemic. Epidemiological models are playing a key role in guiding public health interventions. The SIR model (susceptible, infected, recovered) is used to predict the number of infections over time. Their ability to accurately predict the number of people who will become infected depends on input parameters that are poorly understood. Here the effects of uncertainty on predicted outcomes are explored. The diffusion of ideas on social media is also studied in this context. How ideas propagate can affect societal trends, norms, behaviors, influence markets and the outcomes of elections. The SIR model is again used, but here in combination with sentiment analysis to understand tweet behavior. Different sentiment messages spread at different rates through social media. Parameter estimation in the classical domain is conducted here to understand subsurface transport models that are used for post detonation nuclear forensics. Subsurface gas transport depends on accurately estimating the depth of the underground explosion as well as the geology that surrounds the explosion. The site of the explosions are likely to be denied access sites and parameter estimations must be done remotely. The depth at which a test occurs is known to be a critical parameter, affecting not only the migration time for gases to reach the surface but also their subsequent isotopic ratios. Bayesian data synthesis can improve depth of burst estimates by considering local topology, geology, the presence of surface deformation, yield, and a safety factor (for US tests). Here a method is developed to characterize fracture width, spacing, tortuosity, permeability and porosity at a denied access site. Fractures are treated as fractals with their respective fractal dimensions determined using surface images. The input parameters were applied to a subsurface gas transport model for six underground nuclear explosions conducted by the Democratic People’s Republic of Korea (DPRK). Advisors/Committee Members: Deinert, Mark R. (advisor), Illangasekare, T. H. (committee member), Osborne, Andrew (committee member), Shafer, Jenifer C. (committee member), McClory, John (committee member).

Subjects/Keywords: explosion; Twitter; nuclear; depth

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Duncan, N. A. (2020). Characterization of transport equations with forensic applications (nuclear and social). (Doctoral Dissertation). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/175337

Chicago Manual of Style (16^th Edition):

Duncan, Nickolas A. “Characterization of transport equations with forensic applications (nuclear and social).” 2020. Doctoral Dissertation, Colorado School of Mines. Accessed February 25, 2021. http://hdl.handle.net/11124/175337.

MLA Handbook (7^th Edition):

Duncan, Nickolas A. “Characterization of transport equations with forensic applications (nuclear and social).” 2020. Web. 25 Feb 2021.

Vancouver:

Duncan NA. Characterization of transport equations with forensic applications (nuclear and social). [Internet] [Doctoral dissertation]. Colorado School of Mines; 2020. [cited 2021 Feb 25]. Available from: http://hdl.handle.net/11124/175337.

Council of Science Editors:

Duncan NA. Characterization of transport equations with forensic applications (nuclear and social). [Doctoral Dissertation]. Colorado School of Mines; 2020. Available from: http://hdl.handle.net/11124/175337

NSYSU

10. Huang, Hon-Han. Occupational Safetyï¼ A Case Study of TECO's Explosion Proof Motor.

Degree: Master, EMPP, 2015, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0630115-134320

► The object of this dissertation is the influence of TECOâs explosion-proof motors to the occupational hazard. The purpose statement is to discuss TECOâs explosion-proof motors… (more)

Subjects/Keywords: TECOâs explosion-proof motors; explosion-proof regulations; occupational safety

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Huang, H. (2015). Occupational Safetyï¼ A Case Study of TECO's Explosion Proof Motor. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0630115-134320

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):

Huang, Hon-Han. “Occupational Safetyï¼ A Case Study of TECO's Explosion Proof Motor.” 2015. Thesis, NSYSU. Accessed February 25, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0630115-134320.

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

MLA Handbook (7^th Edition):

Huang, Hon-Han. “Occupational Safetyï¼ A Case Study of TECO's Explosion Proof Motor.” 2015. Web. 25 Feb 2021.

Vancouver:

Huang H. Occupational Safetyï¼ A Case Study of TECO's Explosion Proof Motor. [Internet] [Thesis]. NSYSU; 2015. [cited 2021 Feb 25]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0630115-134320.

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

Council of Science Editors:

Huang H. Occupational Safetyï¼ A Case Study of TECO's Explosion Proof Motor. [Thesis]. NSYSU; 2015. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0630115-134320

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

Texas A&M University

11. Alghamdi, Salem. Development of a Vapor Cloud Explosion Risk Analysis Tool Using Exceedance Methodology.

Degree: MS, Safety Engineering, 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9965

► In development projects, designers should take into consideration the possibility of a vapor cloud explosion in the siting and design of a process plant from… (more)

▼ In development projects, designers should take into consideration the possibility of a vapor cloud explosion in the siting and design of a process plant from day one. The most important decisions pertinent to the location of different process areas, separation between different areas, location of occupied buildings and overall layout may be made at the conceptual stage of the project. During the detailed design engineering stage the final calculation of gas explosion loads is an important activity. However, decisions related to the layout and location of occupied buildings at this stage could be very costly. Therefore, at the conceptual phase of the development project for a hydrocarbon facility, it would be helpful to get a picture of possible vapor cloud explosion loads to be used in studying various options. This thesis presents the analytical parameters that are used in vapor cloud explosion risk analysis. It proposes a model structure for the analysis of vapor cloud explosion risks to buildings based on exceedance methodology. This methodology was developed in a computer program which is used to support this thesis. The proposed model considers all possible gas release scenarios through the use of the Monte Carlo simulation. The risk of vapor cloud explosions can be displayed using exceedance curves. The resulting model provides a predictive tool for vapor cloud explosion problems at the early stages of development projects, particularly in siting occupied buildings in onshore hydrocarbon facilities. It can also be used as a quick analytical tool for investigating various aspects of vapor cloud explosions. This model has been applied to a case study, a debutanizer process unit. The model was used to explore the different alternatives of locating a building near the facility. The results from the model were compared to the results of other existing software to determine the model validity. The results show that the model can effectively examine the risk of vapor cloud explosions. Advisors/Committee Members: Mannan, M. Sam (advisor), Barrufet, Maria A. (committee member), Butenko, Sergiy (committee member).

Subjects/Keywords: Explosion; Vapor Cloud Explosion; Exceedance Curve; Monte Carlo; Risk Analysis

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Alghamdi, S. (2012). Development of a Vapor Cloud Explosion Risk Analysis Tool Using Exceedance Methodology. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9965

Chicago Manual of Style (16^th Edition):

Alghamdi, Salem. “Development of a Vapor Cloud Explosion Risk Analysis Tool Using Exceedance Methodology.” 2012. Masters Thesis, Texas A&M University. Accessed February 25, 2021. http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9965.

MLA Handbook (7^th Edition):

Alghamdi, Salem. “Development of a Vapor Cloud Explosion Risk Analysis Tool Using Exceedance Methodology.” 2012. Web. 25 Feb 2021.

Vancouver:

Alghamdi S. Development of a Vapor Cloud Explosion Risk Analysis Tool Using Exceedance Methodology. [Internet] [Masters thesis]. Texas A&M University; 2012. [cited 2021 Feb 25]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9965.

Council of Science Editors:

Alghamdi S. Development of a Vapor Cloud Explosion Risk Analysis Tool Using Exceedance Methodology. [Masters Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2011-08-9965

INP Toulouse

12. Quillatre, Pierre. Simulation aux grandes échelles d'explosions en domaine semi-confiné : Large Eddy Simulation of Explosions in Semi-Confined Environment.

Degree: Docteur es, Energétique et transferts, 2014, INP Toulouse

URL: http://www.theses.fr/2014INPT0035

► Dans le contexte actuel de croissance continue de la demande mondiale en combustible fossile, la sécurité de la production, du transport, ainsi que du stockage… (more)

▼ Dans le contexte actuel de croissance continue de la demande mondiale en combustible fossile, la sécurité de la production, du transport, ainsi que du stockage de l'énergie est un défi majeur de ce début de XXIème siècle. Les produits manipulés étant extrêmement volatils et inflammables, les éventuelles fuites qui peuvent survenir malgré les lourdes mesures de sécurité mises en place, peuvent engendrer des explosions désastreuses. Il existe donc un fort besoin d'être capable de prédire ces explosions afin de limiter les dégâts potentiels et d'assurer la sécurité des personnes et des biens. Dans cette optique, l'augmentation régulière des puissances de calcul permet à la CFD (Computational Fluid Dynamics) de se présenter comme une alternative intéressante aux expériences qui peuvent s'avérer couteuses et dangereuses. Les explosions sont des phénomènes multi-physiques qui sont principalement dirigés par la turbulence et la combustion et qui prennent place sur une très large gamme d'échelles nécessitant ainsi d'être modélisées. Aujourd'hui, des codes basés sur une approche URANS (Unsteady Reynolds Averaged Navier Stokes) sont généralement utilisés afin de simuler des explosions de gaz dans des configurations à échelle industrielle. Cependant, l'émergence de la LES (Large Eddy Simulation), qui a déjà montré son potentiel à donner des prédictions plus fiables que le URANS sur des configurations instationnaires complexes, ouvre de nouvelles perspectives pour le domaine de la sécurité explosion. Le but principal de cette thèse est d'évaluer l'apport des méthodes LES et de développer une méthodologie pour la prédiction des phénomènes réactifs turbulents transitoires que sont les explosions. Tout au long de cette étude, un intérêt particulier a été porté à l'approfondissement de la compréhension des phénomènes d'explosion ainsi qu'à la mise en valeur des points cruciaux de modélisation qui permettent une reproduction correcte des phénomènes considérés. Notre approche peut alors se résumer en deux temps : - Dans un premier temps nous nous sommes concentrés sur l'étude LES des déflagrations dans une chambre de combustion de petite échelle : la configuration expérimentale de l'Université de Sydney. La LES associée à un modèle de flamme épaissie a ainsi été appliquée à cette configuration à l'aide du code AVBP (développé par le CERFACS et l'IFP-EN) et a permis de mettre en place une méthodologie de calcul. Une étude de Quantification d'Incertitude (UQ) a ensuite été réalisée sur ces simulations afin d'évaluer la fiabilité de ces résultats, ce qui est primordial dans ce contexte d'étude de sécurité. - Dans un second temps, le but a été d'extrapoler les résultats obtenus sur la configuration de petite échelle à des configurations de plus grande échelle, plus représentatives des configurations industrielles réelles de plateformes pétrolières ou de dépôts de carburants qui constituent l'objectif final visé. Une campagne expérimentale a ainsi été lancée afin de construire des répliques de la configuration de Sydney à des échelles plus… Advisors/Committee Members: Poinsot, Thierry (thesis director), Vermorel, Olivier (thesis director).

Subjects/Keywords: Cfd; Sge; Combustion; Sécurité; Explosion; Cfd; Les; Combustion; Safety; Explosion

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Quillatre, P. (2014). Simulation aux grandes échelles d'explosions en domaine semi-confiné : Large Eddy Simulation of Explosions in Semi-Confined Environment. (Doctoral Dissertation). INP Toulouse. Retrieved from http://www.theses.fr/2014INPT0035

Chicago Manual of Style (16^th Edition):

Quillatre, Pierre. “Simulation aux grandes échelles d'explosions en domaine semi-confiné : Large Eddy Simulation of Explosions in Semi-Confined Environment.” 2014. Doctoral Dissertation, INP Toulouse. Accessed February 25, 2021. http://www.theses.fr/2014INPT0035.

MLA Handbook (7^th Edition):

Quillatre, Pierre. “Simulation aux grandes échelles d'explosions en domaine semi-confiné : Large Eddy Simulation of Explosions in Semi-Confined Environment.” 2014. Web. 25 Feb 2021.

Vancouver:

Quillatre P. Simulation aux grandes échelles d'explosions en domaine semi-confiné : Large Eddy Simulation of Explosions in Semi-Confined Environment. [Internet] [Doctoral dissertation]. INP Toulouse; 2014. [cited 2021 Feb 25]. Available from: http://www.theses.fr/2014INPT0035.

Council of Science Editors:

Quillatre P. Simulation aux grandes échelles d'explosions en domaine semi-confiné : Large Eddy Simulation of Explosions in Semi-Confined Environment. [Doctoral Dissertation]. INP Toulouse; 2014. Available from: http://www.theses.fr/2014INPT0035

Université de Lorraine

13. D'Amico, Miriam. Étude expérimentale et modélisation des explosions hybrides solides/solides : application au cas des mélanges de poussières graphite/métaux : Experimental study and modeling of solid/solid hybrid explosions : application to graphite/metal dust mixtures.

Degree: Docteur es, Génie des procédés et des produits, 2016, Université de Lorraine

URL: http://www.theses.fr/2016LORR0256

► Dans le cadre des opérations de démantèlement des centrales nucléaires UNGG (Uranium Naturel Graphite Gaz), l’occurrence de phénomènes indésirables, tels que l’inflammation et l’explosion de… (more)

▼ Dans le cadre des opérations de démantèlement des centrales nucléaires UNGG (Uranium Naturel Graphite Gaz), l’occurrence de phénomènes indésirables, tels que l’inflammation et l’explosion de poudres, ne peut pas être systématiquement exclue. Plus particulièrement, le risque d’inflammation et d’explosion de poussières de graphite, pur ou mélangé avec des impuretés métalliques telles que des particules de magnésium ou de fer, nécessite d’être évalué de façon plus approfondie. Les travaux de cette thèse s’inscrivent donc dans ce contexte et ont deux objectifs principaux : l’évaluation expérimentale de l’explosivité et sa modélisation. 1. L’évaluation expérimentale de l’explosivité des poudres d'intérêt a été réalisée tant en termes de sensibilité à l’inflammation, en couche et en nuage, que de sévérité à l’explosion. En effet, les caractéristiques explosives d’une poussière ou d’un mélange sont fortement influencées par plusieurs paramètres. Ils dépendent d’une part des conditions opératoires, tels que la turbulence, la température et l'énergie d’inflammation, et d’autre part, des propriétés physico-chimiques et de la composition des matériaux. Cette étude s’est focalisée sur des poudres pures de graphite, de magnésium et de fer de taille micrométrique et sur leurs mélanges, dans un éventail de concentrations d’intérêt industriel. Nous avons constaté que l’introduction de métaux peut changer en premier lieu l’étape limitant la vitesse de combustion du graphite. Tout d’abord, les phénomènes cinétiques limitant de l’oxydation du graphite ont été distingués de ceux des métaux (respectivement, réaction hétérogène ou flamme de diffusion gazeuse). En deuxième lieu, il est apparu que la flamme peut être épaissie par la présence du rayonnement lors de la combustion du métal, alors que ce phénomène est négligeable pour le graphite pur. Enfin, la turbulence initiale du nuage de poussière peut être elle aussi modifiée par l'ajout d'une deuxième poudre en vue des caractéristiques granulométriques et de densité différentes. Une étude paramétrique a donc été réalisée afin d'évaluer l'explosibilité des mélanges considérés en prenant en compte les effets de l'humidité relative des poudres, de leur distribution granulométrique, de la puissance de la source d'ignition, de la turbulence initiale du milieu et de la composition. Pour ce faire, nous avons utilisé à la fois des appareils et des technologies conventionnelles, tels que la sphère de 20 litres, la vélocimétrie par images de particules et la thermogravimétrie, mais également des nouvelles installations dédiées à la caractérisation des écoulements turbulents transitoires lors de la dispersion des poudres dans la sphère d'explosion et à l’étude de la propagation d’une flamme en milieu semi-confiné. Il a été clairement démontré que l'ajout de poudres métalliques influence l'aptitude à enflammer le nuage de poussière. L'énergie et la température minimale d'inflammation diminuent fortement lorsque le magnésium est ajouté au graphite ; ce phénomène est moins sensible pour les particules… Advisors/Committee Members: Dufaud, Olivier (thesis director), Perrin, Laurent (thesis director).

Subjects/Keywords: Explosion; Poussière; Démantèlement nucléaire; Explosion; Dust; Nuclear decommissioning; 620.43; 662.2

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

D'Amico, M. (2016). Étude expérimentale et modélisation des explosions hybrides solides/solides : application au cas des mélanges de poussières graphite/métaux : Experimental study and modeling of solid/solid hybrid explosions : application to graphite/metal dust mixtures. (Doctoral Dissertation). Université de Lorraine. Retrieved from http://www.theses.fr/2016LORR0256

Chicago Manual of Style (16^th Edition):

D'Amico, Miriam. “Étude expérimentale et modélisation des explosions hybrides solides/solides : application au cas des mélanges de poussières graphite/métaux : Experimental study and modeling of solid/solid hybrid explosions : application to graphite/metal dust mixtures.” 2016. Doctoral Dissertation, Université de Lorraine. Accessed February 25, 2021. http://www.theses.fr/2016LORR0256.

MLA Handbook (7^th Edition):

D'Amico, Miriam. “Étude expérimentale et modélisation des explosions hybrides solides/solides : application au cas des mélanges de poussières graphite/métaux : Experimental study and modeling of solid/solid hybrid explosions : application to graphite/metal dust mixtures.” 2016. Web. 25 Feb 2021.

Vancouver:

D'Amico M. Étude expérimentale et modélisation des explosions hybrides solides/solides : application au cas des mélanges de poussières graphite/métaux : Experimental study and modeling of solid/solid hybrid explosions : application to graphite/metal dust mixtures. [Internet] [Doctoral dissertation]. Université de Lorraine; 2016. [cited 2021 Feb 25]. Available from: http://www.theses.fr/2016LORR0256.

Council of Science Editors:

D'Amico M. Étude expérimentale et modélisation des explosions hybrides solides/solides : application au cas des mélanges de poussières graphite/métaux : Experimental study and modeling of solid/solid hybrid explosions : application to graphite/metal dust mixtures. [Doctoral Dissertation]. Université de Lorraine; 2016. Available from: http://www.theses.fr/2016LORR0256

West Virginia University

14. Kodakoglu, Furkan. Experimental, Computational and Analytical Studies towards a Predictive Scenario for a Burning Accident.

Degree: PhD, Mechanical and Aerospace Engineering, 2020, West Virginia University

URL: https://doi.org/10.33915/etd.7669 ; https://researchrepository.wvu.edu/etd/7669

► Historically, accidental gas and dust explosions constitute one of the major hazards to both personnel and equipment in the process industries. The current knowledgebase… (more)

▼ Historically, accidental gas and dust explosions constitute one of the major hazards to both personnel and equipment in the process industries. The current knowledgebase on such explosions does not provide an acceptable level of risk. Therefore, novel preventive mining/fire safety strategies, based on a rigorous predictive scenario for burning accidents, are critically needed. The present dissertation is devoted to such a predictive scenario, with a particular focus on the flame and pressure evolutions in explosions encountered in an enclosure with or without obstructions. The experimental component of this dissertation comprises a series of experiments on explosion venting. Specifically, the influence of the vent area on the overpressure and dynamics of the fuel-lean, stoichiometric, and fuel-rich methane-air flames was studied. First, the experiments were conducted in a transparent polycarbonate cylindrical chamber to allow for real-time visualization of the flame front. Experimental parameters included ignition location, central or rear, and three various vent areas (with negligible vent relief pressure). As expected, the highest maximum pressure was associated with the stoichiometric conditions and the smallest vent area. For a fuel-rich mixture with central ignition, a flashback phenomenon was observed after an external explosion. The experimental study was subsequently extended to a twice longer cylinder (with only rear ignition). It showed that an increase in the length of the cylinder promotes the overpressure and the acceleration rate. An engineering model to predict the pressure-time histories of stoichiometric methane-air vented deflagrations was updated and compared to the experiments. Good agreement between the experiments and the simulations was obtained in terms of pressure rise and peak pressure predictions. The future work was recommended on further development of the model in larger scales, congested volumes, and multi-compartment enclosures. For future development of the model, the mechanisms of flame propagation in the passages with or without obstructions were studied. First, the assumptions used on finger flame acceleration were reviewed. The mechanistic and thermal impacts of the passage walls on finger flame acceleration were studied by means of the fully-compressible computational simulations of the reacting flow equations. It was shown that the difference between the effects of slip and nonslip walls was generally minor during the acceleration stages of burning. After a flame skirt contacted a sidewall, wall friction played a role and promoted the flame further. As for the thermal boundaries, cold isothermal walls cool down the flame skirt. Within the theoretical component of this dissertation, the theory for a globally-spherical, self-accelerating expanding premixed flame front was combined with that of extremely fast flame acceleration in obstructed conduits to form a new analytical formulation. The coalmining geometry is imitated by two-dimensional and cylindrical passages of high… Advisors/Committee Members: V'yacheslav Akkerman, Hailin Li.

Subjects/Keywords: vented gas explosion; explosion safety; flame acceleration; Heat Transfer, Combustion

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Kodakoglu, F. (2020). Experimental, Computational and Analytical Studies towards a Predictive Scenario for a Burning Accident. (Doctoral Dissertation). West Virginia University. Retrieved from https://doi.org/10.33915/etd.7669 ; https://researchrepository.wvu.edu/etd/7669

Chicago Manual of Style (16^th Edition):

Kodakoglu, Furkan. “Experimental, Computational and Analytical Studies towards a Predictive Scenario for a Burning Accident.” 2020. Doctoral Dissertation, West Virginia University. Accessed February 25, 2021. https://doi.org/10.33915/etd.7669 ; https://researchrepository.wvu.edu/etd/7669.

MLA Handbook (7^th Edition):

Kodakoglu, Furkan. “Experimental, Computational and Analytical Studies towards a Predictive Scenario for a Burning Accident.” 2020. Web. 25 Feb 2021.

Vancouver:

Kodakoglu F. Experimental, Computational and Analytical Studies towards a Predictive Scenario for a Burning Accident. [Internet] [Doctoral dissertation]. West Virginia University; 2020. [cited 2021 Feb 25]. Available from: https://doi.org/10.33915/etd.7669 ; https://researchrepository.wvu.edu/etd/7669.

Council of Science Editors:

Kodakoglu F. Experimental, Computational and Analytical Studies towards a Predictive Scenario for a Burning Accident. [Doctoral Dissertation]. West Virginia University; 2020. Available from: https://doi.org/10.33915/etd.7669 ; https://researchrepository.wvu.edu/etd/7669

15. Nowak, Hendrik. L'avènement du règne animal de l'intervalle cambro-ordovicien : apports de la palynologie : The rise of animal life of the Cambro-Ordovician interval : contributions from palynology.

Degree: Docteur es, Géosciences, Ecologie, Paléontologie, Océanographie, 2015, Université Lille I – Sciences et Technologies

URL: http://www.theses.fr/2015LIL10177

►

Le Cambrien et l'Ordovicien étaient une période de changements importants dans l'histoire de la vie, lorsque les embranchements animaux actuels ont émergé et des écosystèmes… (more)

▼

Le Cambrien et l'Ordovicien étaient une période de changements importants dans l'histoire de la vie, lorsque les embranchements animaux actuels ont émergé et des écosystèmes de style moderne se sont développés au cours de l'explosion cambrienne et la radiation ordovicienne. Ces deux événements sont au centre du projet RALI (Rise of Animal Life). Dans le cadre de ce projet, ce travail de thèse se focalise sur trois sujets clés concernant des palynomorphes par rapport aux biodiversifications cambro-ordoviciennes : 1) La biodiversité des acritarches du Cambrien, 2) les palynomorphes de la formation de Fezouata (Ordovicien Inférieur, Maroc), et 3) les palynomorphes inhabituels (« Small Carbonaceous Fossils », SCF) du Lagerstätte de Winneshiek (Ordovicien Moyen, Iowa, Etats-Unis). Pour l'analyse de la biodiversité des acritarches, les données d'apparition des espèces et des genres des acritarches au cours du Cambrien sont assemblées et divers indices de diversité sont calculés. Les résultats montrent un lien possible entre les biodiversités des acritarches et des invertébrés marins pendant l'explosion cambrienne, mais aussi un biais sérieux dans les données des acritarches. Des échantillons provenant du Konservat-Lagerstätte (un site avec des fossiles à conservation exceptionnelle) de Fezouata, qui témoigne des premiers stades de la radiation ordovicienne, et du sous-sol ont délivré des acritarches et chitinozoaires abondants et diversifiés. Leurs implications sont discutées. Les schistes de Winneshiek sont riches en vestiges organiques, y compris d'éventuelles mandibules et plaques filtrantes des crustacés, ainsi que des « algues » filamenteuses avec des cellules géantes.

The Cambrian and Ordovician were times of important changes in the history of life, as the present animal phyla emerged and modern-style ecosystems developed during the so-called Cambrian explosion and the Great Ordovician Biodiversification Event. These two events are the focus of the project RALI “The Rise of Animal Life”. As a part of this project, the present thesis concentrates on three key topics regarding palynomorphs in relation to the Cambro-Ordovician biodiversifications: 1) The biodiversity of Cambrian acritarchs, 2) palynomorphs from the Fezouata Formation (Lower Ordovician, Morocco), and 3) unusual palynomorphs (Small Carbonaceous Fossils, SCFs) from the Winneshiek Lagerstätte (Middle Ordovician, Iowa, USA). For the analysis of acritarch biodiversity, occurrence data of acritarch species and genera during the Cambrian are assembled from the literature and various diversity indices are calculated. The results indicate a possible link between the biodiversities of acritarchs and marine invertebrates during the Cambrian explosion, but also a heavy bias in the acritarch data. The Fezouata Formation bears exceptionally preserved biotas, which document the early stages of the GOBE. Samples from this Konservat-Lagerstätte (site yielding exceptionally preserved fossils) and from the sub-surface of the Fezouata Formation yielded abundant and…

Advisors/Committee Members: Servais, Thomas (thesis director), Vandenbroucke, Thijs (thesis director).

Subjects/Keywords: Palynomorphes; Explosion cambrienne; Radiation ordovicienne; 561.13

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Nowak, H. (2015). L'avènement du règne animal de l'intervalle cambro-ordovicien : apports de la palynologie : The rise of animal life of the Cambro-Ordovician interval : contributions from palynology. (Doctoral Dissertation). Université Lille I – Sciences et Technologies. Retrieved from http://www.theses.fr/2015LIL10177

Chicago Manual of Style (16^th Edition):

Nowak, Hendrik. “L'avènement du règne animal de l'intervalle cambro-ordovicien : apports de la palynologie : The rise of animal life of the Cambro-Ordovician interval : contributions from palynology.” 2015. Doctoral Dissertation, Université Lille I – Sciences et Technologies. Accessed February 25, 2021. http://www.theses.fr/2015LIL10177.

MLA Handbook (7^th Edition):

Nowak, Hendrik. “L'avènement du règne animal de l'intervalle cambro-ordovicien : apports de la palynologie : The rise of animal life of the Cambro-Ordovician interval : contributions from palynology.” 2015. Web. 25 Feb 2021.

Vancouver:

Nowak H. L'avènement du règne animal de l'intervalle cambro-ordovicien : apports de la palynologie : The rise of animal life of the Cambro-Ordovician interval : contributions from palynology. [Internet] [Doctoral dissertation]. Université Lille I – Sciences et Technologies; 2015. [cited 2021 Feb 25]. Available from: http://www.theses.fr/2015LIL10177.

Council of Science Editors:

Nowak H. L'avènement du règne animal de l'intervalle cambro-ordovicien : apports de la palynologie : The rise of animal life of the Cambro-Ordovician interval : contributions from palynology. [Doctoral Dissertation]. Université Lille I – Sciences et Technologies; 2015. Available from: http://www.theses.fr/2015LIL10177

16. Laing, Brittany A 1993-. Redefining the Treptichnus pedum zone at the Global Boundary Stratotype Section and Point (GSSP): A critical reassessment of the Ediacaran-Cambrian boundary.

Degree: 2018, University of Saskatchewan

URL: http://hdl.handle.net/10388/8647

► The Cambrian explosion bisects the history of life, separating relatively simple pre-Cambrian life from a complex and diverse Cambrian fauna. Due to the paucity of… (more)

▼ The Cambrian explosion bisects the history of life, separating relatively simple pre-Cambrian life from a complex and diverse Cambrian fauna. Due to the paucity of the body-fossil record, trace fossils often offer the only available insight into these evolutionary milestones, representing a continuous record through the late Ediacaran-early Cambrian. The Chapel Island Formation (CIF) of the Burin Peninsula, Newfoundland, provides an exceptional record of these innovations. Currently, the Global Boundary Stratotype Section and Point (GSSP) for the basal Cambrian boundary is located 2.4 m above the base of member 2 of the CIF, delineated by the lowest observed appearance of the Treptichnus pedum Ichnofossil Assemblage Zone (IAZ). Currently, researchers are facing difficulties when attempting to correlate with a few sections worldwide, and a formal revision of the boundary has been proposed. We hypothesize that a revision of the ichnotaxonomy of the GSSP with an emphasis on trace fossil functional morphology may better illustrate evolutionary innovations at the Ediacaran-Cambrian boundary. In turn, this revised ichnotaxonomy may provide further support for the position of the Ediacaran-Cambrian GSSP. Through a bed-by-bed study, the ichnotaxonomy of the T. pedum IAZ was revised, and a stratigraphic section was measured. Twenty ichnospecies comprising thirteen ichnogenera were observed (Figure 0.1). The ichnospecies were grouped into five ichnoguilds, which were used to conduct an ecospace analysis of the section. The ichnofauna reveled a more gradual appearance of ichnofossil diversity at the boundary, and a more protracted transition between Ediacaran and Cambrian ecosystems than previously envisioned. The T. pedum IAZ in the CIF marks the appearance of novel methods of interacting with the substrate as documented by sub-horizontal branching burrows (treptichnids), equilibrium structures (Bergaueria isp.), and complex vertical burrows (Gyrolithes scintillus). Additionally, it marks the evolution of novel body plans, as revealed by the presence of arthropod scratch marks (Dimorphichnus cf. obliquus). However, remnants of Ediacaran matground ecology are also present. Farming feeding styles are utilized by the Gyrolithes scintillus ichnoguild, and mat grazing remains a common feeding style. These ichnotaxa provide valuable insight into the very beginnings of vertical, penetrative burrowing. They further illuminate the depth and rate at which this new lifestyle evolved, and shed light on the evolution of three-dimensional burrowing. Advisors/Committee Members: Buatois, Luis A., Mángano, M. Gabriela, Narbonne, Guy M., Eglington, Bruce M., Aitken, Alec, Merriam, Jim.

Subjects/Keywords: Trace fossils; Evolutionary paleoecology; Cambrian Explosion

12 more images…

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Laing, B. A. 1. (2018). Redefining the Treptichnus pedum zone at the Global Boundary Stratotype Section and Point (GSSP): A critical reassessment of the Ediacaran-Cambrian boundary. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/8647

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):

Laing, Brittany A 1993-. “Redefining the Treptichnus pedum zone at the Global Boundary Stratotype Section and Point (GSSP): A critical reassessment of the Ediacaran-Cambrian boundary.” 2018. Thesis, University of Saskatchewan. Accessed February 25, 2021. http://hdl.handle.net/10388/8647.

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

MLA Handbook (7^th Edition):

Laing, Brittany A 1993-. “Redefining the Treptichnus pedum zone at the Global Boundary Stratotype Section and Point (GSSP): A critical reassessment of the Ediacaran-Cambrian boundary.” 2018. Web. 25 Feb 2021.

Vancouver:

Laing BA1. Redefining the Treptichnus pedum zone at the Global Boundary Stratotype Section and Point (GSSP): A critical reassessment of the Ediacaran-Cambrian boundary. [Internet] [Thesis]. University of Saskatchewan; 2018. [cited 2021 Feb 25]. Available from: http://hdl.handle.net/10388/8647.

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

Council of Science Editors:

Laing BA1. Redefining the Treptichnus pedum zone at the Global Boundary Stratotype Section and Point (GSSP): A critical reassessment of the Ediacaran-Cambrian boundary. [Thesis]. University of Saskatchewan; 2018. Available from: http://hdl.handle.net/10388/8647

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

University of Toronto

17. Jin, Xiaoxing. Interaction between a Molten Smelt Droplet and Water at Different Temperatures.

Degree: 2013, University of Toronto

URL: http://hdl.handle.net/1807/42973

►

In a kraft recovery dissolving tank, high temperature molten smelt droplets fall into an aqueous solution and dissolve. The rapid heat transfer between molten smelt… (more)

Subjects/Keywords: chemical engineering; vapor explosion; kraft pulping; 0542

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Jin, X. (2013). Interaction between a Molten Smelt Droplet and Water at Different Temperatures. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/42973

Chicago Manual of Style (16^th Edition):

Jin, Xiaoxing. “Interaction between a Molten Smelt Droplet and Water at Different Temperatures.” 2013. Masters Thesis, University of Toronto. Accessed February 25, 2021. http://hdl.handle.net/1807/42973.

MLA Handbook (7^th Edition):

Jin, Xiaoxing. “Interaction between a Molten Smelt Droplet and Water at Different Temperatures.” 2013. Web. 25 Feb 2021.

Vancouver:

Jin X. Interaction between a Molten Smelt Droplet and Water at Different Temperatures. [Internet] [Masters thesis]. University of Toronto; 2013. [cited 2021 Feb 25]. Available from: http://hdl.handle.net/1807/42973.

Council of Science Editors:

Jin X. Interaction between a Molten Smelt Droplet and Water at Different Temperatures. [Masters Thesis]. University of Toronto; 2013. Available from: http://hdl.handle.net/1807/42973

University of Surrey

18. West, Samantha. Groups of symmetries on concurrent systems.

Degree: PhD, 2002, University of Surrey

URL: http://epubs.surrey.ac.uk/844163/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250790

► A well known problem when reasoning about concurrent systems is that of state explosion. One of the strategies that has been proposed to alleviate this… (more)

Subjects/Keywords: 005; State explosion

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

West, S. (2002). Groups of symmetries on concurrent systems. (Doctoral Dissertation). University of Surrey. Retrieved from http://epubs.surrey.ac.uk/844163/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250790

Chicago Manual of Style (16^th Edition):

West, Samantha. “Groups of symmetries on concurrent systems.” 2002. Doctoral Dissertation, University of Surrey. Accessed February 25, 2021. http://epubs.surrey.ac.uk/844163/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250790.

MLA Handbook (7^th Edition):

West, Samantha. “Groups of symmetries on concurrent systems.” 2002. Web. 25 Feb 2021.

Vancouver:

West S. Groups of symmetries on concurrent systems. [Internet] [Doctoral dissertation]. University of Surrey; 2002. [cited 2021 Feb 25]. Available from: http://epubs.surrey.ac.uk/844163/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250790.

Council of Science Editors:

West S. Groups of symmetries on concurrent systems. [Doctoral Dissertation]. University of Surrey; 2002. Available from: http://epubs.surrey.ac.uk/844163/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250790

19. Öberg, Max. En designad fluidsimulation.

Degree: Technology and Learning Processes, 2013, Gotland University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-204367

► In this report I will describe how an art-directed fluid effect for motion picture can be achieved. This effect will be an explosion with… (more)

Subjects/Keywords: Fluidsimulation; Cartooney; Explosion; FumeFX; Datorgrafik; Visuell gestaltning

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Öberg, M. (2013). En designad fluidsimulation. (Thesis). Gotland University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-204367

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):

Öberg, Max. “En designad fluidsimulation.” 2013. Thesis, Gotland University. Accessed February 25, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-204367.

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

MLA Handbook (7^th Edition):

Öberg, Max. “En designad fluidsimulation.” 2013. Web. 25 Feb 2021.

Vancouver:

Öberg M. En designad fluidsimulation. [Internet] [Thesis]. Gotland University; 2013. [cited 2021 Feb 25]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-204367.

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

Council of Science Editors:

Öberg M. En designad fluidsimulation. [Thesis]. Gotland University; 2013. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-204367

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

Delft University of Technology

20. De Jong, D.J. (author). Explosion loads in immersed tunnels.

Degree: Civil Engineering and Geosciences, Hydraulic Engineering, 2000, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:4921dfeb-ab99-4c7e-b4e1-83e4d5df794f

► Certain goods have properties that may cause severe effects in case of an accident during transport. The most striking events are the occurrence of fire… (more)

▼ Certain goods have properties that may cause severe effects in case of an accident during transport. The most striking events are the occurrence of fire and explosions. Since tunnels are isolated environments, many casualties and severe damage are to be expected in case of an explosion. Although the probability for such an event is rather small, restrictions apply for tunnels concerning transport of hazardous goods. As a result of these restrictions alternative routes have to be used, often resulting in long detours that sometimes cross built-up areas, which is also undesirable. Therefore, at some locations it is desired to ease the restrictions for tunnels. For a recent immersed tunnel project requirements concerning explosion loads were stated. A static pressure of 500 kPa and a suction of 300 kPa should be taken into account. The nature of the requirement was not clear however. During the tender phase, BAM Infraconsult concluded that large thicknesses for the slabs and walls of the tunnel are required. The concrete elements, of which an immersed tunnel is composed, should float during transport, while in the final situation a large deadweight is favorable in order to prevent uplift. These are contrary demands that result in a very delicate balance. The requirement for the explosion load interferes with this balance and makes it difficult to comply with all demands efficiently if traditional design methods are applied. This research is at first initiated in order to evaluate the recently stated statically defined requirement concerning explosion loads. Secondly, a technical feasibility study into the design of an explosion resistant immersed tunnel is performed. In order to investigate the effect of explosion loads, a simplified analytical model was developed whereby the structure is divided into several elements that are schematized as single degree of freedom mass spring systems. Furthermore, the dynamic module of the finite element code Plaxis was used to perform more advanced calculations. Both models were used in the evaluation of the requirement and technical feasibility study. It is concluded that the representative explosion load is due to a LPG Boiling Liquid Expanding Explosion (BLEVE). The order of magnitude that has to be taken into account is obtained from recent research into this topic by TNO. Although the static requirement of 500 kPa pressure and 300 kPa suction is already hard to comply with, the order of magnitude is too small compared to the representative dynamic BLEVE Load according to TNO. The representative load according to TNO is used for the technical feasibility study. Several solutions, with respect to reduction of the load, dissipation of energy and application of alternative materials are considered. Exploring calculations were performed for promising solutions in order to judge the technical feasibility. It is concluded that the application of separate tubes provides an efficient structural solution. Since the vehicles transporting the dangerous goods are isolated from the regular… Advisors/Committee Members: Vrijling, J.K. (mentor), Bakker, K.J. (mentor), Van der Horst, A.Q.C. (mentor), Hakkaart, C.J.A. (mentor), Wolsink, G.M. (mentor), BAM Infraconsult bv (contributor).

Subjects/Keywords: explosion; immersed; tunnel

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

De Jong, D. J. (. (2000). Explosion loads in immersed tunnels. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:4921dfeb-ab99-4c7e-b4e1-83e4d5df794f

Chicago Manual of Style (16^th Edition):

De Jong, D J (author). “Explosion loads in immersed tunnels.” 2000. Masters Thesis, Delft University of Technology. Accessed February 25, 2021. http://resolver.tudelft.nl/uuid:4921dfeb-ab99-4c7e-b4e1-83e4d5df794f.

MLA Handbook (7^th Edition):

De Jong, D J (author). “Explosion loads in immersed tunnels.” 2000. Web. 25 Feb 2021.

Vancouver:

De Jong DJ(. Explosion loads in immersed tunnels. [Internet] [Masters thesis]. Delft University of Technology; 2000. [cited 2021 Feb 25]. Available from: http://resolver.tudelft.nl/uuid:4921dfeb-ab99-4c7e-b4e1-83e4d5df794f.

Council of Science Editors:

De Jong DJ(. Explosion loads in immersed tunnels. [Masters Thesis]. Delft University of Technology; 2000. Available from: http://resolver.tudelft.nl/uuid:4921dfeb-ab99-4c7e-b4e1-83e4d5df794f

Colorado School of Mines

21. Goertz, Benjamin. Recommendations for the prevention and suppression of coal dust explosions at underground coal mines in the United States.

Degree: MS(M.S.), Mining Engineering, 2017, Colorado School of Mines

URL: http://hdl.handle.net/11124/171009

► The underground coal industry has recognized the need for better regulations and practices to prevent coal dust explosions in the United States. The catastrophe that… (more)

Subjects/Keywords: explosion; prevention; underground; mining; coal dust; safety

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Goertz, B. (2017). Recommendations for the prevention and suppression of coal dust explosions at underground coal mines in the United States. (Masters Thesis). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/171009

Chicago Manual of Style (16^th Edition):

Goertz, Benjamin. “Recommendations for the prevention and suppression of coal dust explosions at underground coal mines in the United States.” 2017. Masters Thesis, Colorado School of Mines. Accessed February 25, 2021. http://hdl.handle.net/11124/171009.

MLA Handbook (7^th Edition):

Goertz, Benjamin. “Recommendations for the prevention and suppression of coal dust explosions at underground coal mines in the United States.” 2017. Web. 25 Feb 2021.

Vancouver:

Goertz B. Recommendations for the prevention and suppression of coal dust explosions at underground coal mines in the United States. [Internet] [Masters thesis]. Colorado School of Mines; 2017. [cited 2021 Feb 25]. Available from: http://hdl.handle.net/11124/171009.

Council of Science Editors:

Goertz B. Recommendations for the prevention and suppression of coal dust explosions at underground coal mines in the United States. [Masters Thesis]. Colorado School of Mines; 2017. Available from: http://hdl.handle.net/11124/171009

Brno University of Technology

22. Lužný, Jan. Minimalizace rizik výbuchu v lakovnách: Reduction of risks of explosive atmospheres in coating plants.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/40125

► Bachelor’s thesis deals with conditions of explosion, areas with danger of an explosion and their division into individual zones. Furthermore the thesis is focused to… (more)

Subjects/Keywords: Výbuch; nebezpečí výbuchu; minimalizace výbuchu; protivýbuchová prevence; výbušné prostředí; lakovny.; Explosion; danger of explosion; reduction of explosion; prevention of explosion; explosive atmospheres; coating plants.

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Lužný, J. (2019). Minimalizace rizik výbuchu v lakovnách: Reduction of risks of explosive atmospheres in coating plants. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/40125

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):

Lužný, Jan. “Minimalizace rizik výbuchu v lakovnách: Reduction of risks of explosive atmospheres in coating plants.” 2019. Thesis, Brno University of Technology. Accessed February 25, 2021. http://hdl.handle.net/11012/40125.

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

MLA Handbook (7^th Edition):

Lužný, Jan. “Minimalizace rizik výbuchu v lakovnách: Reduction of risks of explosive atmospheres in coating plants.” 2019. Web. 25 Feb 2021.

Vancouver:

Lužný J. Minimalizace rizik výbuchu v lakovnách: Reduction of risks of explosive atmospheres in coating plants. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Feb 25]. Available from: http://hdl.handle.net/11012/40125.

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

Council of Science Editors:

Lužný J. Minimalizace rizik výbuchu v lakovnách: Reduction of risks of explosive atmospheres in coating plants. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/40125

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

Queens University

23. Hlouschko, Stefan Joseph. The effects of porous media on explosion development in partially filled enclosures .

Degree: Mechanical and Materials Engineering, 2008, Queens University

URL: http://hdl.handle.net/1974/1362

► Two experiments were performed to investigate the interaction of a combustion wave with porous media. The first experiment was performed in a 1.22m long, 76mm… (more)

▼ Two experiments were performed to investigate the interaction of a combustion wave with porous media. The first experiment was performed in a 1.22m long, 76mm wide, and 152mm high horizontal channel with a nitrogen-diluted stoichiometric methane-oxygen mixture at initial pressures of 20-50kPa. A layer of 12.7mm diameter ceramic-oxide spheres was placed along the bottom to partially obstruct the channel, leaving a gap of free space above. For a fixed gap height the bead layer thickness had very little effect on explosion propagation. For a fixed bead layer thickness the explosion propagation was strongly influenced by the gap height. For example, a 31% nitrogen diluted mixture at room temperature resulted in DDT for a gap height of 38mm at initial pressures of 30-50 kPa, but not for 109mm over the same pressures. The gap above the bead layer permits DDT as long as the gap height is larger than one detonation cell width. Propagation of the detonation wave over the bead layer is possible if the gap height can accommodate at least two detonation cells. For a 38mm gap, velocity measurements and sooted foil imprints indicate that the detonation undergoes successive failure and re-initiation, referred to as “galloping” in the literature. In the second experiment, the head-on collision of a combustion front with a layer of 3 and 12.7mm diameter ceramic-oxide spheres was investigated in a 61cm long, 76.2mm diameter vertical tube for a nitrogen-diluted stoichiometric ethylene-oxygen mixture at initial pressures of 10-100kPa. Four orifice plates were placed at the ignition end to accelerate the premixed flame to a “fast-flame” or a detonation wave. For fast-flames pressures recorded at the bead layer face were up to five times the reflected CJ detonation pressure. This explosion iv developed by two distinct mechanisms: a) shock reflection off the bead layer face and b) shock transmission into the bead layer and subsequent explosion therein. The measured explosion delay time (time after shock reflection from the bead layer face) was found to be independent of the incident shock velocity. Thus, it was shown that explosion initiation is not the direct result of shock reflection but is more likely due to the interaction of the reflected shock with the trailing flame. The bead layer was found to be very effective in attenuating the explosion and isolating the tube endplate.

Subjects/Keywords: Porous media ; Explosion

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Hlouschko, S. J. (2008). The effects of porous media on explosion development in partially filled enclosures . (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/1362

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):

Hlouschko, Stefan Joseph. “The effects of porous media on explosion development in partially filled enclosures .” 2008. Thesis, Queens University. Accessed February 25, 2021. http://hdl.handle.net/1974/1362.

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

MLA Handbook (7^th Edition):

Hlouschko, Stefan Joseph. “The effects of porous media on explosion development in partially filled enclosures .” 2008. Web. 25 Feb 2021.

Vancouver:

Hlouschko SJ. The effects of porous media on explosion development in partially filled enclosures . [Internet] [Thesis]. Queens University; 2008. [cited 2021 Feb 25]. Available from: http://hdl.handle.net/1974/1362.

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

Council of Science Editors:

Hlouschko SJ. The effects of porous media on explosion development in partially filled enclosures . [Thesis]. Queens University; 2008. Available from: http://hdl.handle.net/1974/1362

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

University of Canterbury

24. Foote, Lauren Charlotte. Experimental modelling of fragmentation processes within phreatic and hydrothermal eruptions.

Degree: MS, Geology, 2012, University of Canterbury

URL: http://dx.doi.org/10.26021/8913

► Phreatic and hydrothermal eruptions often occur with little or no warning representing a significant hazard within geothermal regions. These violent eruptions occur at a range… (more)

▼ Phreatic and hydrothermal eruptions often occur with little or no warning representing a significant hazard within geothermal regions. These violent eruptions occur at a range of temperatures and pressures within varying rock types. A range of mechanisms including heating or decompression, allows hydrothermal/supercritical fluid to rapidly flash to steam, expanding and shattering the surrounding rock to produce an eruption, with no direct magmatic influence. These eruptions are highly variable resulting in the current wide ranging classification schemes, many of which are based on characteristics that are hard to observe and define. This has resulted in confusing nomenclature with many different terms used to describe the same eruptive phenomena. Here a new classification scheme is presented, based on the easily definable features of eruption size, trigger type (natural or anthropogenic) and geological setting (volcanic or hydrothermal). This ultimately produces a classification dividing the eruptions into either phreatic, where magma interacts with cold water but no juvenile material is erupted; or hydrothermal where eruption occurs from an already heated hydrothermal system. Examples are then provided for each classification type. Previous studies have focused exclusively on either physical characteristics of eruptions, small scale experimental modelling of trigger processes or mathematical modelling of various eruption characteristics. Here, a new experimental procedure has been developed to model phreatic fragmentation, based on shock tube experiments for magmatic fragmentation by Alidibirov and Dingwell (1996). Water saturated samples are fragmented from a combination of argon gas overpressure and steam flashing within vesicles. In this thesis, these experimental results have been integrated with the physical characteristics of porosity, permeability and mineralogy to create two new models of phreatic fragmentation. Firstly a generalised model to explain fragmentation processes and secondly a specific model describing the eruption forming Lake Okaro, within the Taupo Volcanic Zone of New Zealand. These models were developed with the overall aim to improve understanding of these eruption types, ultimately improving future hazard modelling. Experiments were performed on Rangitaiki ignimbrite, through which the Okaro eruption occurred. In order to evaluate alteration effects, both unaltered ignimbrite and hydrothermally altered ignimbrite samples were analysed. Experiments were performed at room temperature and 300°C with pressures from 4 to 15 MPa, to reflect likely geothermal conditions while also assessing the effect of liquid water on fragmentation. Results indicate that within these samples 5 to 8 MPa of decompression is required to trigger an eruption, fitting well with the previously identified trend between decompression and porosity for magmatic samples. The fragmentation front propagates through the sample at speeds ranging between 14 m/s to 42 m/s, increasing with higher applied pressures and…

Subjects/Keywords: fragmentation; phreatic; hydrothermal; eruption; explosion; Lake Okaro

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Foote, L. C. (2012). Experimental modelling of fragmentation processes within phreatic and hydrothermal eruptions. (Masters Thesis). University of Canterbury. Retrieved from http://dx.doi.org/10.26021/8913

Chicago Manual of Style (16^th Edition):

Foote, Lauren Charlotte. “Experimental modelling of fragmentation processes within phreatic and hydrothermal eruptions.” 2012. Masters Thesis, University of Canterbury. Accessed February 25, 2021. http://dx.doi.org/10.26021/8913.

MLA Handbook (7^th Edition):

Foote, Lauren Charlotte. “Experimental modelling of fragmentation processes within phreatic and hydrothermal eruptions.” 2012. Web. 25 Feb 2021.

Vancouver:

Foote LC. Experimental modelling of fragmentation processes within phreatic and hydrothermal eruptions. [Internet] [Masters thesis]. University of Canterbury; 2012. [cited 2021 Feb 25]. Available from: http://dx.doi.org/10.26021/8913.

Council of Science Editors:

Foote LC. Experimental modelling of fragmentation processes within phreatic and hydrothermal eruptions. [Masters Thesis]. University of Canterbury; 2012. Available from: http://dx.doi.org/10.26021/8913

University of Canterbury

25. Chen, Nick. Smoke Explosion in Severally Ventilation Limited Compartment Fires.

Degree: Master of Engineering in Fire Engineering, Fire Engineering, 2012, University of Canterbury

URL: http://dx.doi.org/10.26021/2996

► A smoke explosion is generally considered as a deflagration of the accumulated unburned fuel inside a closed compartment. However, the term smoke explosion has been… (more)

▼ A smoke explosion is generally considered as a deflagration of the accumulated unburned fuel inside a closed compartment. However, the term smoke explosion has been widely misused for decades with a great deal of confusion, and very little research has been done towards this topic. The purpose of this research is to study the smoke explosion phenomenon in much more detail through the development of a fire scenario under various experimental conditions including ventilation size, fuel elevation and fuel mass, so that a more comprehensive understanding of this phenomenon can be achieved. A total of twenty experiments are carried out including both exploratory and final experiments. Thirteen experiments result in smoke explosions, among which there are five experiments result in more than one smoke explosion. A phenomenon referred as smoldering decay is observed in all experiments with smoke explosions, making it one of the precursors of the smoke explosion phenomenon. The smoldering decay is often indicated by an exponential decay of the temperature and is caused by the low oxygen concentration within the compartment. Based on the analysis, it is found that the vent size must be at least 50 mm in diameter in order for smoke explosions to occur. The fuel elevation has no influence on the occurrence of the smoke explosion. However when the fuel is placed near the ceiling, the temperature, the mass flow rate and the heat release rate are all lowered significantly. The size of the fuel also has no significant influence except for the duration of the experiment. The concentration of CO is scattered in the range of 1.9% and 4.3% when explosions occur. Hence, the accumulation of CO is considered not to be the direct cause for the smoke explosion. The triggering factor for smoke explosions is believed to be the flammable limit formed by the mixture of hydrocarbon and CO. The pressure difference caused by the explosion inside the compartment has to be at least 27 Pa for it to be considered as a smoke explosion.

Subjects/Keywords: Smoke explosion; Compartment Fires; Ventilation limited; Backdraft

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Chen, N. (2012). Smoke Explosion in Severally Ventilation Limited Compartment Fires. (Masters Thesis). University of Canterbury. Retrieved from http://dx.doi.org/10.26021/2996

Chicago Manual of Style (16^th Edition):

Chen, Nick. “Smoke Explosion in Severally Ventilation Limited Compartment Fires.” 2012. Masters Thesis, University of Canterbury. Accessed February 25, 2021. http://dx.doi.org/10.26021/2996.

MLA Handbook (7^th Edition):

Chen, Nick. “Smoke Explosion in Severally Ventilation Limited Compartment Fires.” 2012. Web. 25 Feb 2021.

Vancouver:

Chen N. Smoke Explosion in Severally Ventilation Limited Compartment Fires. [Internet] [Masters thesis]. University of Canterbury; 2012. [cited 2021 Feb 25]. Available from: http://dx.doi.org/10.26021/2996.

Council of Science Editors:

Chen N. Smoke Explosion in Severally Ventilation Limited Compartment Fires. [Masters Thesis]. University of Canterbury; 2012. Available from: http://dx.doi.org/10.26021/2996

University of Texas – Austin

26. Nedorostova, Andrea. A Texas town with more problems and few answers : two years after a deadly chemical explosion, West finds closure almost impossible.

Degree: MA, Journalism, 2015, University of Texas – Austin

URL: http://hdl.handle.net/2152/32375

► The story of West is a saga of a small Texas town seeking closure – and not getting it. Despite an ongoing, two-year-long investigation, the fertilizer… (more)

Subjects/Keywords: West; Explosion; Investigation; Fertilizer plant; Disaster; Closure

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Nedorostova, A. (2015). A Texas town with more problems and few answers : two years after a deadly chemical explosion, West finds closure almost impossible. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/32375

Chicago Manual of Style (16^th Edition):

Nedorostova, Andrea. “A Texas town with more problems and few answers : two years after a deadly chemical explosion, West finds closure almost impossible.” 2015. Masters Thesis, University of Texas – Austin. Accessed February 25, 2021. http://hdl.handle.net/2152/32375.

MLA Handbook (7^th Edition):

Nedorostova, Andrea. “A Texas town with more problems and few answers : two years after a deadly chemical explosion, West finds closure almost impossible.” 2015. Web. 25 Feb 2021.

Vancouver:

Nedorostova A. A Texas town with more problems and few answers : two years after a deadly chemical explosion, West finds closure almost impossible. [Internet] [Masters thesis]. University of Texas – Austin; 2015. [cited 2021 Feb 25]. Available from: http://hdl.handle.net/2152/32375.

Council of Science Editors:

Nedorostova A. A Texas town with more problems and few answers : two years after a deadly chemical explosion, West finds closure almost impossible. [Masters Thesis]. University of Texas – Austin; 2015. Available from: http://hdl.handle.net/2152/32375

Texas A&M University

27. Han, Haitian. Hybrid Flammable Dust-Gas Cloud Ignition Using a Modified Standard Minimum Ignition Energy Device.

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

URL: http://hdl.handle.net/1969.1/173152

► Hybrid dust-gas explosion is a persistent problem in process industries because of its ease of ignition as well as serious consequences. Ease of ignition is… (more)

▼ Hybrid dust-gas explosion is a persistent problem in process industries because of its ease of ignition as well as serious consequences. Ease of ignition is quantified by minimum ignition energy (MIE), which is associated with the probability of ignition for a hybrid mixture. This study aims at improving the MIE measurement of hybrid dust-gas system using a modified Kühner MIKE3 MIE apparatus with an add-on purge device in order to purge the Hartmann tube with the gas mixture before the dust dispersion. It allows the gas composition in the Hartmann tube to be the same as that of the gas used for dispersing the dust. In this study, a typical hybrid system of Pittsburgh Pulverized Coal (PPC)- methane-air, was utilized to accomplish the tests, where two sizes of PPC with equivalent polydispersity was applied. Methane was pre-blended with ultra-high purity (UHP) air (21% oxygen and 79% nitrogen) at 1 vol %, 2 vol %, and 3 vol %. MIE testing was conducted for the following two cases: case (a) and case (b). Case (a) followed the ASTM E2019-03 standard procedure, while case (b) applied the pre-ignition Hartmann tube purge with 1 vol %, 2 vol %, and 3 vol % methane prior to dust dispersion and ignition. The testing was also divided into two sections: Section 1 including case (a1) and (b1) used the original dried PPC, while section 2 including case (a2) and (b2) used the milled PPC. Comparison of MIE values for both cases in both sections displayed significant differences. The hybrid MIE values obtained in case (b) are overall lower than those in case (a), illustrating that pre-ignition tube purge decreased the hybrid MIE value and gave more conservative MIE results. While smaller size of dust possessed lower hybrid MIE, similar trends in percent of MIE reduction revealed the impact of gas concentration on decrease of hybrid MIE regardless the particle size. Moreover, this study proves that previous hybrid MIE data generated using the ASTM E2019-03 standard procedure and utilizing the Hartmann apparatus and Kühner MIKE3 device yielded non-conservative results and should be validated through further studies by incorporating pre-ignition Hartmann tube purge into the hybrid MIE test procedure. Advisors/Committee Members: Mashuga, Chad V. (advisor), Cheng, Zhengdong (committee member), Petersen, Eric L. (committee member).

Subjects/Keywords: Minimum Ignition Energy; Dust Explosion; Hybrid Explosion; Modified Kühner MIKE3 MIE device

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Han, H. (2017). Hybrid Flammable Dust-Gas Cloud Ignition Using a Modified Standard Minimum Ignition Energy Device. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/173152

Chicago Manual of Style (16^th Edition):

Han, Haitian. “Hybrid Flammable Dust-Gas Cloud Ignition Using a Modified Standard Minimum Ignition Energy Device.” 2017. Masters Thesis, Texas A&M University. Accessed February 25, 2021. http://hdl.handle.net/1969.1/173152.

MLA Handbook (7^th Edition):

Han, Haitian. “Hybrid Flammable Dust-Gas Cloud Ignition Using a Modified Standard Minimum Ignition Energy Device.” 2017. Web. 25 Feb 2021.

Vancouver:

Han H. Hybrid Flammable Dust-Gas Cloud Ignition Using a Modified Standard Minimum Ignition Energy Device. [Internet] [Masters thesis]. Texas A&M University; 2017. [cited 2021 Feb 25]. Available from: http://hdl.handle.net/1969.1/173152.

Council of Science Editors:

Han H. Hybrid Flammable Dust-Gas Cloud Ignition Using a Modified Standard Minimum Ignition Energy Device. [Masters Thesis]. Texas A&M University; 2017. Available from: http://hdl.handle.net/1969.1/173152

28. Millogo, Myriam. Allumage, combustion et explosion des poudres d'aluminium, de titane et de leurs alliages : Ignition combustion and explosion of aluminum titanium and their alloys powders.

Degree: Docteur es, Energétique, 2019, Université d'Orléans

URL: http://www.theses.fr/2019ORLE2006

►

Depuis ces dernières années, les procédés de fabrication par addition de matière commencent à faire leur apparition dans les entreprises occupant des secteurs à forte… (more)

▼

Depuis ces dernières années, les procédés de fabrication par addition de matière commencent à faire leur apparition dans les entreprises occupant des secteurs à forte valeur ajoutée comme l’aéronautique, le spatial ou le secteur de l’armement. Ces procédés d’addition de matière mettent en oeuvre des poudres métalliques issues des alliages métallurgiques utilisés couramment dans l’industrie mécanique. Le projet EXPAALT a été développé sur la problématique du risque d’explosion autour des poudres d’aluminium, de titane et de leurs alliages et cette thèse s’inscrit dans ce contexte. Son objectif est de contribuer d’une part à la détermination des paramètres de sécurité de ces poudres, et d’autre part à la compréhension des mécanismes de combustion de celles-ci. Pour ce faire, onze poudres métalliques ont été sélectionnées dont quatre poudres pures et sept alliages. Leurs caractéristiques de combustion ont été étudiées dans une bombe sphérique de 20 litres et dans un tube d’Hartmann. A l’appui de ces dispositifs, des diagnostics optiques, en plus du capteur de pression de la sphère, comme un pyromètre IR à deux couleurs et un spectromètre UV-visible ont été utilisés. Les mécanismes de combustion ont été interprétés en combinant une approche thermodynamique à l’équilibre avec une caractérisation fine des produits de combustion. Les résultats obtenus ont montré que les poudres pures sont plus sensibles et plus sévères à l’explosion que leurs alliages. Dans les analyses des produits de combustion, il est noté la présence de phases cristallisées et de phases amorphes, permettant de mettre en évidence la complexité des mécanismes de formation des produits de combustion. Dans tous les cas de figure, il apparait que l’oxygène et l’azote sont deux réactifs lors de la combustion comme en témoigne l’analyse des produits. La proportion entre oxyde et nitrure est directement contrôlée par la richesse. Ces résultats fournissent des informations nouvelles sur la combustion des poudres pures étudiées et de leurs alliages, montrant la nécessité de faire évoluer les modèles de combustion.

In recent years, the layer-by-layer manufacturing process seems to be used increasingly amongst the aeronautics, space or defense industries. These Additive Layer Manufacturing processes use metal powders from metallurgical alloys commonly used in the mechanical industry. The EXPAALT project was developed on the problematic of explosion risk around aluminum, titanium and their alloys powders. This thesis is part of this project and aims to contribute on the one hand to the determination of the safety parameters, and on the other hand to the comprehension of combustion mechanisms of these powders. For such, eleven metal powders were selected including four pure powders and seven alloys. Their combustion characteristics were studied in a 20 liter spherical bomb and in a Hartmann tube. In support of these devices, optical diagnostics, in addition to the pressure sensor of 20 liter spherical bomb, such as a two-color IR pyrometer and a UV-Visible…

Advisors/Committee Members: Gillard, Philippe (thesis director).

Subjects/Keywords: Explosion de poussières; Aluminium; Titane; Alliages; Combustion; Dust explosion; Aluminium; Titanium; Alloys; Combustion; 620.1

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Millogo, M. (2019). Allumage, combustion et explosion des poudres d'aluminium, de titane et de leurs alliages : Ignition combustion and explosion of aluminum titanium and their alloys powders. (Doctoral Dissertation). Université d'Orléans. Retrieved from http://www.theses.fr/2019ORLE2006

Chicago Manual of Style (16^th Edition):

Millogo, Myriam. “Allumage, combustion et explosion des poudres d'aluminium, de titane et de leurs alliages : Ignition combustion and explosion of aluminum titanium and their alloys powders.” 2019. Doctoral Dissertation, Université d'Orléans. Accessed February 25, 2021. http://www.theses.fr/2019ORLE2006.

MLA Handbook (7^th Edition):

Millogo, Myriam. “Allumage, combustion et explosion des poudres d'aluminium, de titane et de leurs alliages : Ignition combustion and explosion of aluminum titanium and their alloys powders.” 2019. Web. 25 Feb 2021.

Vancouver:

Millogo M. Allumage, combustion et explosion des poudres d'aluminium, de titane et de leurs alliages : Ignition combustion and explosion of aluminum titanium and their alloys powders. [Internet] [Doctoral dissertation]. Université d'Orléans; 2019. [cited 2021 Feb 25]. Available from: http://www.theses.fr/2019ORLE2006.

Council of Science Editors:

Millogo M. Allumage, combustion et explosion des poudres d'aluminium, de titane et de leurs alliages : Ignition combustion and explosion of aluminum titanium and their alloys powders. [Doctoral Dissertation]. Université d'Orléans; 2019. Available from: http://www.theses.fr/2019ORLE2006

Université de Lorraine

29. Santandrea, Audrey. New insights on the explosion severity of nanopowders : a nano-grain of sand in the gears of the standards : Nouvelles considérations sur l'explosivité des nanopoudres : un nano-grain de sable dans les rouages des standards.

Degree: Docteur es, Génie des procédés, des produits et des molécules, 2020, Université de Lorraine

URL: http://www.theses.fr/2020LORR0104

►

La petite taille des nanoparticules induit une grande surface spécifique, qui procure des propriétés inédites, notamment chimiques, mécaniques, optiques ou biologiques, comparées aux particules micrométriques.… (more)

▼

La petite taille des nanoparticules induit une grande surface spécifique, qui procure des propriétés inédites, notamment chimiques, mécaniques, optiques ou biologiques, comparées aux particules micrométriques. Parmi ces nouvelles spécificités, les nanoparticules sont soumises à des forces de cohésion plus intenses, telles que des forces de van der Waals, électrostatiques ou capillaires, ce qui les amène à s’agglomérer de manière réversible. Cependant, une explosion de poussières nécessite une dispersion de la poudre dans l’air, ce qui peut mener à une fragmentation de ces agglomérats. L’objectif de ce travail est ainsi d’étudier l’influence des spécificités des nanoparticules, notamment de l’agglomération, sur leur sensibilité à l’inflammation et leur sévérité d’explosion, et d’évaluer l’adéquation des méthodes définies par les standards internationaux pour la détermination de ces paramètres concernant les nanoparticules. Quatre types de poudres ont été considérées pour étudier le comportement spécifique de chaque type de combustible: noirs de carbone, nanocellulose, aluminium et silicium enrobé de carbone. Les poudres ont été caractérisées au repos, et leur distribution de tailles de particules a été mesurée avant et après dispersion à l’aide de méthodes complémentaires. Le diamètre moyen en surface diminue significativement après l’injection dans la sphère de 20L, i.e l’équipement standard utilisé pour mesurer la sévérité d’explosion. Cette observation prouve la nécessité de caractériser la poudre après injection dans la sphère de 20L, pour évaluer le risque de manière fiable. Des essais d’inflammation et d’explosion ont été réalisés dans des conditions standards, mais aussi modifiant la préparation de la poudre (vieillissement, séchage, tamisage, agglomération) ainsi que les conditions opératoires (procédure de dispersion, énergie d’inflammation, turbulence initiale). Des comportements spécifiques liés à la nature de la poudre (carbonée, organique ou métallique) ont été observés, discutés, et des méthodes alternatives de mesure ont été proposées. Par exemple, la procédure de dispersion et la source d'inflammation doivent être adaptées à l'énergie d'allumage minimale des nanopoudres pour éviter à la fois les phénomènes de pré-inflammation et ‘d’overdriving’. Enfin, l’une des principales propositions consiste à considérer la vitesse laminaire de flamme comme un paramètre standard représentant la sévérité d’explosion. Des tests ont été réalisés dans un tube de propagation de flamme et dans une sphère éventée pour évaluer la vitesse non étirée de la nanocellulose. Les résultats obtenus ont alors été comparés à une corrélation existante basée sur les paramètres obtenus lors d’essais standards. De plus, un modèle de propagation de flamme, initialement développée pour des mélanges hybrides, a été adapté pour représenter la propagation de flamme dans un nuage de nanoparticules et a montré des résultats en adéquation avec les résultats expérimentaux.

The small size of nanoparticles implies a high specific surface area,…

Advisors/Committee Members: Dufaud, Olivier (thesis director), Perrin, Laurent (thesis director).

Subjects/Keywords: Explosion; Nanoparticules; Sécurité; Agglomération; Propagation de flamme; Explosion; Nanoparticles; Safety; Agglomeration; Flame propagation; 620.43

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Santandrea, A. (2020). New insights on the explosion severity of nanopowders : a nano-grain of sand in the gears of the standards : Nouvelles considérations sur l'explosivité des nanopoudres : un nano-grain de sable dans les rouages des standards. (Doctoral Dissertation). Université de Lorraine. Retrieved from http://www.theses.fr/2020LORR0104

Chicago Manual of Style (16^th Edition):

Santandrea, Audrey. “New insights on the explosion severity of nanopowders : a nano-grain of sand in the gears of the standards : Nouvelles considérations sur l'explosivité des nanopoudres : un nano-grain de sable dans les rouages des standards.” 2020. Doctoral Dissertation, Université de Lorraine. Accessed February 25, 2021. http://www.theses.fr/2020LORR0104.

MLA Handbook (7^th Edition):

Santandrea, Audrey. “New insights on the explosion severity of nanopowders : a nano-grain of sand in the gears of the standards : Nouvelles considérations sur l'explosivité des nanopoudres : un nano-grain de sable dans les rouages des standards.” 2020. Web. 25 Feb 2021.

Vancouver:

Santandrea A. New insights on the explosion severity of nanopowders : a nano-grain of sand in the gears of the standards : Nouvelles considérations sur l'explosivité des nanopoudres : un nano-grain de sable dans les rouages des standards. [Internet] [Doctoral dissertation]. Université de Lorraine; 2020. [cited 2021 Feb 25]. Available from: http://www.theses.fr/2020LORR0104.

Council of Science Editors:

Santandrea A. New insights on the explosion severity of nanopowders : a nano-grain of sand in the gears of the standards : Nouvelles considérations sur l'explosivité des nanopoudres : un nano-grain de sable dans les rouages des standards. [Doctoral Dissertation]. Université de Lorraine; 2020. Available from: http://www.theses.fr/2020LORR0104

30. Caruso, Roberto. Propagation of Hydrogen Air Vapor Flame in presence of Water Droplets : Propagation de la flamme d'hydrogène- air- vapeur d'eau en présence de gouttelettes d'eau.

Degree: Docteur es, Combustion, Energétique, Mécanique des fluides, 2019, Université d'Orléans

URL: http://www.theses.fr/2019ORLE2002

►

L'accident de Fukushima en 2011 a remis en évidence les graves conséquences qu'une explosion d’un mélange gazeux à base d'hydrogène induit sur les installations et… (more)

▼

L'accident de Fukushima en 2011 a remis en évidence les graves conséquences qu'une explosion d’un mélange gazeux à base d'hydrogène induit sur les installations et l'environnement. Lors de cet accident, la destruction complète du réacteur 2 a entraîné un rejet important de poussières radioactives dans l'atmosphère avec de graves conséquences environnementales qui sont encore à l'étude. Une connaissance approfondie de la propagation d'une flamme d'hydrogène dans un environnement confiné est essentielle pour comprendre les conditions de transition entre les régimes de déflagration et de détonation de la flamme qui peuvent compromettre l'intégrité du bâtiment réacteur. Un aspect des aspects qui a été très peu étudié concerne l'impact que l'activation des jets d'eau de refroidissement peut avoir sur la gravité d'une explosion. Le but de ce travail de thèse est de mieux comprendre le rôle de l'injection d'eau pulvérisée sur les régimes de combustion de mélanges hydrogène-air (vitesses de propagation et chargement en pression) dans un espace confiné. Ce travail de recherche a débuté par une étude préliminaire afin d'évaluer l'impact de la présence de vapeur d'eau sur la vitesse laminaire et sur l'épaisseur de flamme. Par la suite, une étude expérimentale a été menée, au laboratoire ICARE-CNRS Orléans, dans un tube d'accélération vertical ENACCEF 1 (volume interne 720 l). Pour mener cette étude, différents mélanges hydrogène/air ont été choisis, représentatifs de différents régimes de combustion, afin d'investiguer l'impact de la pulvérisation d'eau sur une flamme ascendante et descendante. L'ensemble du travail constitue une base de données expérimentale utile pour la validation de codes CFD utilisés dans l'évaluation de la sureté des installations nucléaires.

The Fukushima accident in 2011 highlighted the serious consequences that an explosion of a hydrogen-based gas mixture has on installations and the environment. In this accident, the complete destruction of Reactor 2 resulted in a significant release of radioactive dust into the atmosphere with serious environmental consequences that are still under investigation. A thorough knowledge of the propagation of a hydrogen flame in a confined environment is essential to understand the transition conditions between deflagration and flame detonation regimes that can compromise the integrity of the reactor building. One aspect of the aspects that has been little studied concerns the impact that the activation of cooling water jets can have on the severity of an explosion. The purpose of this thesis work is to better understand the role of water spray injection on the combustion regimes of hydrogen-air mixtures (propagation rates and pressure loading) in a confined space. This research work began with a preliminary study to evaluate the impact of the presence of water vapour on laminar velocity and flame thickness. Subsequently, an experimental study was carried out at the ICARE-CNRS Orléans laboratory in an ENACCEF 1 vertical acceleration tube (internal volume 720 l). To…

Advisors/Committee Members: Chaumeix, Nabiha (thesis director), Gökalp, Iskender (thesis director).

Subjects/Keywords: Hydrogène; Explosion; Gouttelettes; Sûreté nucléaire; Hydrogen; Explosion; Water Spray; Nuclear Safety; 621.48; 665.8

Record Details Similar Records Cite « Share

❌

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

APA (6^th Edition):

Caruso, R. (2019). Propagation of Hydrogen Air Vapor Flame in presence of Water Droplets : Propagation de la flamme d'hydrogène- air- vapeur d'eau en présence de gouttelettes d'eau. (Doctoral Dissertation). Université d'Orléans. Retrieved from http://www.theses.fr/2019ORLE2002

Chicago Manual of Style (16^th Edition):

Caruso, Roberto. “Propagation of Hydrogen Air Vapor Flame in presence of Water Droplets : Propagation de la flamme d'hydrogène- air- vapeur d'eau en présence de gouttelettes d'eau.” 2019. Doctoral Dissertation, Université d'Orléans. Accessed February 25, 2021. http://www.theses.fr/2019ORLE2002.

MLA Handbook (7^th Edition):

Caruso, Roberto. “Propagation of Hydrogen Air Vapor Flame in presence of Water Droplets : Propagation de la flamme d'hydrogène- air- vapeur d'eau en présence de gouttelettes d'eau.” 2019. Web. 25 Feb 2021.

Vancouver:

Caruso R. Propagation of Hydrogen Air Vapor Flame in presence of Water Droplets : Propagation de la flamme d'hydrogène- air- vapeur d'eau en présence de gouttelettes d'eau. [Internet] [Doctoral dissertation]. Université d'Orléans; 2019. [cited 2021 Feb 25]. Available from: http://www.theses.fr/2019ORLE2002.

Council of Science Editors:

Caruso R. Propagation of Hydrogen Air Vapor Flame in presence of Water Droplets : Propagation de la flamme d'hydrogène- air- vapeur d'eau en présence de gouttelettes d'eau. [Doctoral Dissertation]. Université d'Orléans; 2019. Available from: http://www.theses.fr/2019ORLE2002

		in
And / Or
		in
And / Or
		in
And / Or
		in

Open Access Theses and Dissertations