Article
Engineering, Environmental
Alain Islas, Andres Rodriguez Fernandez, Covadonga Betegon, Emilio Martinez-Paneda, Adrian Panda
Summary: This study presents CFD simulations of biomass dust explosions using a newly developed experimental apparatus, and validates the CFD model's capability to capture transient effects. The results show excellent agreement between the model and experiments, highlighting the critical role of particle size in flame dynamics and the explosion itself. This model has great potential for future investigations of biomass dust explosions in larger-scale geometries.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Environmental
Kai Yang, Yanbin Chen, Qiuping Xiao, Lei Pang
Summary: Research using CFD on the explosion and venting processes of aluminium dust revealed that increasing the venting coefficient can reduce indoor overpressure and explosion temperature, but also increase outdoor damage distance. Thus, current safety protection distances for aluminium powder production sites need revision.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Energy & Fuels
Xingyan Cao, Rui Huang, Yawei Lu, Zhirong Wang, Longtao Fan, Yangqing Zhou, Jianjun Xu
Summary: This research investigates the venting characteristics and influence factors of methane and coal dust mixture explosions. The study analyzes the corresponding relationship between venting parameters and the effect of methane concentration. Results show that the venting flame experiences an evolution process from mushroom to spherical to strip structures. The venting flame is longest and has the fastest propagation velocity at 6% methane concentration. Secondary venting phenomena occur at 6% and 8% methane concentrations, with the phenomenon being more evident at 8% methane concentration. Venting pressures are highest at 6% methane concentration, followed by 8% methane concentration.
Article
Chemistry, Physical
Quan Li, Shengchao Rui, Xinjiao Luo, Changjian Wang
Summary: This study investigated the effects of hydrogen concentration, ignition location, and obstacles on vented hydrogen-air explosions. Results showed that obstacles changed the flame propagation inside the container and increased the flame area, promoting the reaction. Existing engineering models over-predicted the maximum reduced explosion pressure for high-reactivity mixtures.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Weiguo Cao, Zhuanghong Zhou, Wenjuan Li, Yiming Zhao, Zhenxin Yang, Yun Zhang, Shin-Mei Ouyang, Chi-Min Shu, Yingxin Tan
Summary: Studying the under-expansion jet flame structure and influential factors is crucial for hydrogen safety in explosion venting. Experimentation showed under-expansion jet flames were generated with hydrogen fractions of 30-60 vol.%, with the longest duration at a fraction of 40 vol.%. The spacing between under-expansion jet flame structures increased with explosion venting diameter and hydrogen fraction, but decreased with duct length.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
C. X. He, Q. L. Yue, Q. Chen, T. S. Zhao
Summary: This study establishes a reliable thermal runaway model based on experimental kinetic analysis, providing insights into the mechanisms of thermal runaway and valuable guidance for the thermal safety design of lithium-ion batteries.
Article
Geosciences, Multidisciplinary
L. A. Morgan, W. C. P. Shanks, K. L. Pierce, N. Iverson, C. M. Schiller, S. R. Brown, P. Zahajska, R. Cartier, R. W. Cash, J. L. Best, C. Whitlock, S. Fritz, W. Benzel, H. Lowers, D. A. Lovalvo, J. M. Licciardi
Summary: Hydrothermal explosions in Yellowstone National Park pose significant hazards, especially in the northern Yellowstone Lake area. Geological and geochemical studies of sublacustrine cores have provided detailed information on the age, sedimentary facies, and origin of hydrothermal explosion deposits. These explosions are initiated by sudden pressure drops and result in the rapid expansion of high-temperature fluids, leading to fragmentation, ejection, and crater formation. The alkaline-Cl and/or vapor-dominated fluids in Yellowstone produce distinct alteration patterns and can lead to more energetic events compared to vapor expansion.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2023)
Article
Energy & Fuels
Qiao Wang, Xinjiao Luo, Quan Li, Shengchao Rui, Changjian Wang, Aifeng Zhang
Summary: Experiments conducted in an obstructed rectangular tube revealed that the blockage ratio of the obstacle has a significant impact on the peak overpressure induced by the obstacle, but a negligible effect on the peak overpressure resulting from vent rupture. Lower blockage ratios mainly increase peak overpressure through enhanced turbulence and burning rate, while higher blockage ratios result in peak overpressure from the combined effect of flame acceleration and external explosion.
Article
Engineering, Chemical
Yann Gregoire, Emmanuel Leprette, Christophe Proust
Summary: Flameless venting is a mitigation technique that allows venting of process vessels inside buildings without transmitting flames, requiring certification and considering efficiency factors and implications for practical use and certification processes.
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2021)
Article
Engineering, Chemical
Sheng Shang, Jia Zhang, Jiaxian Zhang, Tianpei Luo, Mingshu Bi, Haipeng Jiang, Yanchao Li, Wei Gao
Summary: This study independently designs a set of hydrogen explosion suppression equipment and examines its effects on suppressing hydrogen explosions at normal room temperature and pressure. The experimental results indicate that the actuation time and spraying mode of the equipment are the main factors causing failure. When the suppressant touches the flame front, the flame with a hydrogen equivalence ratio of 0.7 and 1.0 spreads uncontrollably, leading to enhanced flame propagation and increased pressure. However, if the initial flame is completely covered by the suppressant, the hydrogen explosion is successfully suppressed. This research provides a reliable foundation for hydrogen explosion suppression equipment in industrial safety and production protection.
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2023)
Article
Geochemistry & Geophysics
Robert J. Mellors, Robert Abbott, David Steedman, David Podrasky, Arben Pitarka
Summary: Fiber optic distributed acoustic sensors (DAS) are effective in recording strong ground motions caused by subsurface chemical explosions. However, difficulties may arise in matching absolute amplitudes, despite reasonable agreement in relative amplitudes between DAS data and colocated accelerometers.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Energy & Fuels
Shengchao Rui, Changjian Wang, Xinjiao Luo, Rulin Jing, Quan Li
Summary: The study investigated the effects of hydrogen concentration and ignition location on external explosions during vented hydrogen-air deflagrations in a cubic vessel. Different ignition locations resulted in variations in the maximum overpressure peaks and the impact of external explosions on flame evolution outside the vessel.
Article
Chemistry, Physical
Sheng Shang, Mingshu Bi, Kai Zhang, Yanchao Li, Zehua Gao, Zongling Zhang, Xiaolin Li, Changshuai Zhang, Wei Gao
Summary: This study investigates the effects of isobutene on hydrogen explosions, revealing trends in explosion overpressure and pressure parameters with varying concentrations of isobutene in hydrogen-air mixtures. The chemical suppression mechanism of isobutene on hydrogen explosions is detailed through numerical simulations.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Sheng Shang, Mingshu Bi, Kai Zhang, Yanchao Li, Zehua Gao, Zongling Zhang, Xiaolin Li, Changshuai Zhang, Wei Gao
Summary: The effects of isobutene on hydrogen explosions were investigated, revealing its ability to suppress the explosions. For lean mixtures, the addition of isobutene led to an initial increase and subsequent decrease in explosion pressure parameters, while for stoichiometric and rich mixtures, the pressure parameters decreased monotonously with increasing isobutene content. Numerical simulations revealed the chemical suppression mechanism of isobutene on hydrogen explosions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Sheng Shang, Mingshu Bi, Zongling Zhang, Yanchao Li, Zehua Gao, Changshuai Zhang, Xiaolin Li, Kai Zhang, Wei Gao
Summary: This study investigates the effects of isobutene and carbon dioxide on hydrogen explosions and finds that their combination can effectively suppress explosion pressure and deflagration index. Numerical simulation reveals the mechanism of the suppression by isobutene and carbon dioxide.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Chemical
Jenny Chao, John H. S. Lee, C. Regis Bauwens, Sergey B. Dorofeev
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2015)
Article
Thermodynamics
C. Regis Bauwens, Jeffrey M. Bergthorson, Sergey B. Dorofeev
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2015)
Article
Chemistry, Physical
C. R. L. Bauwens, J. M. Bergthorson, S. B. Dorofeev
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2017)
Article
Thermodynamics
C. Regis Bauwens, Jeffrey M. Bergthorson, Sergey B. Dorofeev
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2017)
Article
Thermodynamics
C. Regis Bauwens, Jeff Chaffee, Sergey Dorofeev
COMBUSTION SCIENCE AND TECHNOLOGY
(2010)
Article
Chemistry, Physical
C. R. Bauwens, J. Chao, S. B. Dorofeev
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2012)
Article
Chemistry, Physical
C. R. Bauwens, S. B. Dorofeev
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2014)
Article
Chemistry, Physical
C. R. Bauwens, S. B. Dorofeev
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2014)
Article
Thermodynamics
J. Chao, C. R. Bauwens, S. B. Dorofeev
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2011)
Article
Thermodynamics
C. Regis L. Bauwens, Jeffrey M. Bergthorson, Sergey B. Dorofeev
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2019)
Article
Multidisciplinary Sciences
Luc Bauwens, C. Regis L. Bauwens, Ida Wierzba
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2009)
Article
Thermodynamics
C. Regis, L. Bauwens, Luc Bauwens, Ida Wierzba
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2007)