Article
Engineering, Chemical
Shuangming Wei, Minggao Yu, Rizhong Bao, Bei Pei, Shuo Chen
Summary: The study investigated the explosion characteristics of syngas/air mixtures at sub-atmospheric pressures with different equivalence ratios and fuel compositions, indicating the sensitivity of explosion parameters to initial pressure depends on equivalence ratios and fuel compositions.
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2022)
Article
Chemistry, Physical
I. C. Tolias, A. G. Venetsanos, M. Kuznetsov, S. Koutsoukos
Summary: In this study, a newly developed CFD deflagration model integrated into the ADREA-HF code was evaluated against hydrogen vented deflagration experiments in different scale enclosures. The model showed good performance for back-wall ignition cases, but overestimated the maximum overpressure for center ignition cases, possibly due to the opening of the vent cover. Turbulence was identified as the main factor enhancing external explosion strength leading to sudden pressure increases.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Chemical
G. Momferatos, S. G. Giannissi, I. C. Tolias, A. G. Venetsanos, A. Vlyssides, N. Markatos
Summary: In this study, three different types of vapor cloud explosion experiments were simulated to evaluate a newly developed CFD model and analyze the involved phenomena. The CFD model, implemented in the ADREA-HF CFD code, successfully predicted the overpressure values and discussed the factors contributing to the pressure rise in each experiment.
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2022)
Article
Energy & Fuels
Rongqi Peng, Ping Ping, Gongquan Wang, Xu He, Depeng Kong, Wei Gao
Summary: Large-scale Energy Storage Systems (ESS) based on lithium-ion batteries (LIBs) are rapidly expanding worldwide, but the simulation and assessment of battery vented gas explosions in ESS containers are still lacking. This study developed a three-dimensional combustion model to evaluate the hazards of gas explosions to the ESS container structure and surroundings. The results show that altering the vent door pressure without the top vent panel can lead to serious explosion accidents, and lower vented gas concentrations and the introduction of the vent panel design can reduce these hazards.
Article
Energy & Fuels
Huizhen Li, Huahua Xiao
Summary: This paper presents an experimental study of the explosion characteristics of NH3/DME blends. The results show that the peak explosion pressure, maximum pressure rise rate, and deflagration index vary nonmonotonically with the equivalence ratio, and reach peak values at certain ratios. DME addition has a positive effect on explosion intensity.
Review
Mechanics
Venkat Raman, Supraj Prakash, Mirko Gamba
Summary: A rotating detonation engine (RDE) uses a traveling detonation wave to compress and release heat, providing high efficiency in small volumes. However, nonidealities such as unsteady mixing and multiple competing waves need to be managed for optimal performance. This review discusses the understanding of these nonidealities and the techniques used to study them in RDEs.
ANNUAL REVIEW OF FLUID MECHANICS
(2023)
Article
Engineering, Chemical
Shuya Hou, Yi Liu, Zhi Wang, Mingju Jing, Yingnan Zhang, Bin Zhang
Summary: This study investigated a large vapor cloud explosion resulting from an LPG transportation accident in Wenling City, China. The analysis showed that DDT occurred in the accident and provided scientific recommendations for preventing similar incidents.
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2022)
Article
Engineering, Chemical
Francis Oppong, Luo Zhongyang, Xiaolu Li, Cangsu Xu
Summary: The study investigated the confined explosion characteristics of ethyl acetate in a constant volume explosion vessel. It was found that the peak explosion pressure and the maximum pressure rise rate increased with higher initial pressure and lower initial temperature. Additionally, the explosion time decreased with decreasing initial pressure. The experimental and theoretical deflagration index of ethyl acetate were compared, showing different levels of hazard potential.
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2021)
Article
Thermodynamics
Rachel Hytovick, Cal Rising, Anthony Morales, Tommy Genova, Joshua Berson, Kareem Ahmed
Summary: This work experimentally investigates the role of flame-generated compression in the deflagration to detonation transition process. It quantifies the compression compared to other flame regimes and identifies the reactant conditions where flame-generated compression begins. The study provides detailed insight into the flame and flow field characteristics where the runaway process occurs.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2023)
Article
Engineering, Environmental
V Bisio, F. Montomoli, S. Rossin, M. Ruggiero, V. L. Tagarielli
Summary: The study introduces a design methodology based on analytical models to assess the effects of pressure waves generated by deflagration events on objects, and validates these models through case studies and comparisons with detailed simulations.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Review
Energy & Fuels
Maria Mitu, Codina Movileanu, Venera Giurcan
Summary: This study presents data on the characteristic parameters of explosion propagation in gaseous ethane-air mixtures and analyzes their relationships with initial pressure, initial temperature, equivalence ratio, and explosion vessel characteristics. Ethane is widely used in various industries and applications, making it important to understand its explosion characteristics for safety and performance prediction purposes.
Article
Engineering, Chemical
Lei Pang, Huikang Peng, Siheng Sun, Kai Yang
Summary: This study investigates the inhibitory effect of NH4H2PO4 on the flame propagation of aluminum alloy dust clouds. The results show that the concentration of NH4H2PO4 has a greater impact on the inhibition effect on aluminum alloy dust, while the particle size has a smaller influence.
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2023)
Article
Energy & Fuels
Yong Cao, Bin Li, Lifeng Xie, Xuhai Pan
Summary: This paper presents experiments and numerical simulation on vented methane-air explosions, investigating the influence of methane concentration and vent burst pressure on internal pressure, temperature, and fuel concentration.
Article
Chemistry, Physical
Tao Wang, He Liang, Jingjing Lin, Zhenmin Luo, Hu Wen, Fangming Cheng, Jingyu Zhao, Bin Su, Ruikang Li, Xuhan Ding, Jun Deng
Summary: This study investigated the explosion thermal behavior of H-2/CH4/air mixtures at different equivalence ratios and hydrogen volume fractions. The results show that increasing the hydrogen volume fraction can increase peak explosion pressure and combustion index, while shortening the explosion duration. The information obtained can help in developing measures to prevent potential explosion accidents.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Yanchao Li, Yonghao Zhou, Zongling Zhang, Sheng Shang, Wei Gao
Summary: This study investigates hydrogen cloud explosion under external turbulence through experiments and theoretical calculations. The flame characteristics and explosion pressure are measured in experiments using high-speed camera and pressure sensor. The theoretical calculation uses LM, LMIET, and TM methods to determine the peak explosion pressure. The results show that most flame characteristics are observed in the zone of wrinkled flamelets, and explosion-related parameters increase as gear level and equivalence ratio increase. The experimental peak explosion pressure is significantly higher than the LM method due to neglecting flame acceleration propagation and external turbulence effects, while it is significantly lower than the LMIET and TM methods due to considering flame instabilities and turbulence.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)