An Experimental Study on Safety-Relevant Parameters of Turbulent Gas Explosion Venting at Elevated Initial Pressure

Poli, Marco; Grätz, Rainer; Schröder, V.

doi:10.1016/j.proeng.2012.07.398

Cited by 4 publications

(1 citation statement)

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“…The initial pressure has a distinct effect on the chemical reaction rate and explosion intensity of combustible mixtures [1][2][3]. To date, the influence of the initial pressure on gas explosions in isolated vessels or pipelines has been studied by many researchers [1][2][3][4][5][6][7][8][9][10][11]. Experiments for the determination of explosion pressures of rich methane-air mixtures were performed by Schoor et al [2] in a closed spherical vessel with four different igniter positions at initial pressures up to 30 bar.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of the initial pressure effect on methane‐air explosions in linked vessels

Zhen

Wang

Gong

2017

Process Safety Progress

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This study experimentally addresses the pressure evolution during the closed and vented explosion progress of a methane‐air mixture ([CH4 = 10%]) in different vessel‐pipeline configurations at ambient initial temperature and different initial pressures. Based on the experimental measurements, it is found that the maximum values of both closed and vented explosion pressure increase linearly with the initial pressure in isolated and linked vessel scenarios. Compared with a vented explosion, the initial pressure has a greater impact on the explosion overpressure in an isolated vessel and a single spherical vessel connected to a pipe during a closed explosion. For the configuration of two spherical vessels connected by a pipe, the explosion overpressure in the primary vessel is always lower than that in the secondary vessel during both closed and vented explosions at each initial pressure. According to Chapman‐Jouget Detonation Theory (C‐J detonation theory), when the ignition is located in a large vessel, detonation is observed in the secondary vessel at an initial pressure of 0.08 MPa. The vent position and ignition position both have an influence on the extent of variation of the pressure differential between two vessels with a given initial pressure. For the configuration of a single vessel connected to a pipe, the initial pressure influences the maximum explosion pressure and vented explosion overpressure least in a small vessel when the ignition position is located in the small vessel. These conclusions can provide references for the safety design of chemical equipment. © 2017 American Institute of Chemical Engineers Process Process Saf Prog 37:86–94, 2018

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