Numerical simulation of gas explosion in enclosed interconnected vessel based on HLLC algorithm

doi:10.16265/j.cnki.issn1003-3033.2018.12.011

Abstract

Abstract: HLLC algorithm based on density solver was embedded into the OpenFOAM to accurately capture shock wave induced by gas explosion. In order to overcome stiff problems in the flow field calculation, a method was developed based on tabulation methodology of detailed chemical reactions(TDC). Propagation characteristics of shock wave induced by gas explosion in ducts under different gas volume fractions were studied in an 1 m³ confined vessel connected to ducts, and the results of numerical simulation were verified through the experiments. The transient flow field in the transfer vessel was also studied by numerical simulation. Research results show that the flame is accelerated to jet into the transfer vessel after passing through the pipeline, and the shock wave arises suddenly and intensely due to the Interaction between reflection wave and flame, that the longer the pipeline is, the stronger the pressure will be in the transfer vessel, that the flame propagation speed in ducts increases initially and then decreases when the length of the pipeline is 6 m and 10 m, and that when the length is 4 m, the flame speed increases continuously.

Key words: Harten-lax-van leer contact(HLLC) algorithm, enclosed interconnected vessel, gas explosion, numerical simulation, OpenFOAM

CLC Number:

X932

LIU Yujiao, GAO Ke, JIA Jinzhang. Numerical simulation of gas explosion in enclosed interconnected vessel based on HLLC algorithm[J]. China Safety Science Journal, 2018, 28(12): 65-70.

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