scholarly journals Propagation law and analysis of gas explosion in bend duct

2009 ◽  
Vol 1 (1) ◽  
pp. 316-321 ◽  
Author(s):  
Ye Qing ◽  
Lin Bai-quan ◽  
Jia Zhen-zhen ◽  
Zhu Chuan-jie
Keyword(s):  
Gas Explosion ◽  
Propagation Law

Effect of low-concentration coal dust on gas explosion propagation law

2020 ◽  
Vol 367 ◽  
pp. 243-252 ◽  
Author(s):  
Chaowei Guo ◽  
Hao Shao ◽  
Shuguang Jiang ◽  
Yajun Wang ◽  
Kai Wang ◽  
...  
Keyword(s):  
Coal Dust ◽  
Gas Explosion ◽  
Low Concentration ◽  
Propagation Law

Numerical Analysis of Shock Wave Propagation Law of Internal Gas Explosion

2011 ◽  
Vol 105-107 ◽  
pp. 299-302
Author(s):  
Xiu Hua Zhang ◽  
Yan Yan Wu
Keyword(s):  
Shock Wave ◽  
Wave Propagation ◽  
Initial Energy ◽  
Shock Wave Propagation ◽  
Coupling Method ◽  
Frame Structure ◽  
Gas Explosion ◽  
Fluid Structure ◽  
Explosion Pressure ◽  
Propagation Law

The purpose of this paper is to research on shock wave propagation law of internal gas explosion. The multi-material Eulerian and Lagrangian coupling algorithm was adopt. Using ANSYS/LS-DYNA dynamic analysis software to build frame structure, air and gas explosion models. Multiple ALE elements for simulating air and gas explosion material the analysis of blast shock wave propagation in a three-story steel frame structure and the characteristics of explosion pressure using fluid-structure coupling method are carried out. The conclusions show that fluid-structure coupling method can well simulated shock wave propagation of internal gas explosion, and the pressure peak of blast shock wave increased with the increasing of the blast air initial energy. Locality is the characteristic of explosion pressure in sealed space, and the pressure pass weakly when it propagates in solid.

Study on the propagation law of gas explosion in the space based on the goaf characteristic of coal mine

2020 ◽  
Vol 127 ◽  
pp. 104693 ◽  
Author(s):  
Ke Gao ◽  
Sheng-nan Li ◽  
Rong Han ◽  
Run-zhi Li ◽  
Zi-meng Liu ◽  
...  
Keyword(s):  
Coal Mine ◽  
Gas Explosion ◽  
Propagation Law

The propagation law and analysis of gas explosion in U type duct

2008 ◽  
Vol 14 (2) ◽  
pp. 252-256
Author(s):  
-Qing Ye ◽  
Bai-quan Lin ◽  
Zhen-zhen Jia ◽  
Tao Feng ◽  
Hai-qiao Wang
Keyword(s):  
Gas Explosion ◽  
Propagation Law

scholarly journals The research into the propagation law of the shock wave of a gas explosion inside a building

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Shu-Chao Lin ◽  
You-Chun Xu ◽  
Pei-Dong Yang ◽  
Shan Gao ◽  
Yi-Jun Zhou ◽  
...  
Keyword(s):  
Shock Wave ◽  
Peak Pressure ◽  
Initial Conditions ◽  
Three Dimensional ◽  
Time History ◽  
Element Model ◽  
Space Distribution ◽  
Gas Explosion ◽  
Propagation Law ◽  
Three Dimensional Finite Element

Based on the dissipation rate conservation equations of turbulent kinetic energy in the k-ε turbulence model, a complicated three-dimensional finite element model of a kitchen filled with gas mixture is developed by using the open source field operation and manipulation (OpenFOAM). Two representative kitchens were used to investigate the propagation law of the shock wave of a gas explosion inside a building by considering the key characteristics of the blast shock wave. The influence of some crucial parameters, such as initial conditions and kitchen parameters, on the properties of the blast shock wave is investigated. The basic steps to predict the peak pressure of the blast shock wave are given in consideration of the initial condition and the kitchen whilst the injury effect of the blast shock wave on the humans and animals is evaluated. The research results indicate that the pressure time history and the peak pressure space distribution are greatly influenced by the kitchen design layout. The coupled interaction between the initial temperature and gas volume concentration, especially at the upper and lower explosion limits of the gas, significantly affects the peak pressure. The peak pressure varies significantly with the opening and the buffer; however, it has little relation with the width, length, and height of the kitchen. The proposed method can accurately and effectively predict the peak pressure of the blast shock wave inside buildings. In terms of the peak pressure space distribution of the explosion shock wave, the peak pressure is much higher than the threshold of the killing pressure, which is unsafe for the humans and animals in the building.

scholarly journals Propagation law of flame in a pipeline produced in gas explosion: numerical analysis and experimental verification

2021 ◽  
pp. 106-106
Author(s):  
Zhi-Wei Jia ◽  
Tao Ban ◽  
Rui-Xia Zhang ◽  
Yue Sun ◽  
Sheng-Ming Xu
Keyword(s):  
Numerical Analysis ◽  
Experimental Verification ◽  
Prevention And Control ◽  
Gas Explosion ◽  
Propagation Law ◽  
And Control

Serious accidents of gas explosion always result in massive casualties, however the propagation law of flame during gas explosion is not clear yet, though it is important for prevention and control of such accidents. This paper designs a piping gas explosion system for numerical revealing the propagation law, which is then verified experimentally.

Vapour-liquid equilibrium in the ternary system cyclohexane-acetic acid-propionic acid

1989 ◽  
Vol 54 (11) ◽  
pp. 2840-2847 ◽  
Author(s):  
Ivona Malijevská ◽  
Alena Maštalková ◽  
Marie Sýsová
Keyword(s):  
Acetic Acid ◽  
Ternary System ◽  
Propionic Acid ◽  
Activity Coefficients ◽  
Error Propagation ◽  
Analytical Techniques ◽  
Liquid Equilibrium ◽  
Consistency Test ◽  
Propagation Law ◽  
Equilibrium Data

Isobaric equilibrium data (P = 101.3 kPa) for the system cyclohexane-acetic acid-propionic acid have been measured by two different analytical techniques. Activity coefficients calculated by simultaneous solving of equations for the chemical and phase equilibria were subjected to a consistency test based on inaccuracies determined from the error propagation law, and were correlated by Wilson’s equation. The activity coefficients measured were compared with those calculated from binary vapour-liquid equilibrium data and with values predicted by the UNIFAC method.

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