Experimental study on influence of ignition position on gas explosion in explosion-proof chamber
In order to investigate the problem that there is no unified standard for the installation positions of ignition source and pressure measuring devices in the explosion test of explosion-proof shell at present,the influence of ignition position on the gas explosion in the explosion-proof chamber was deeply discussed.The explosion-proof chamber of square explosion-proof shell was taken as the research object,and the gas explosion tests in the explosion-proof chamber with 5 different ignition po-sitions were carried out by using the self-developed gas explosion test device in the explosion-proof chamber.The results show that the ignition position has significant influence on the explosion pressure and the pressure rise rate in the explosion-proof chamber.When the ignition position is located at the geometric center of the chamber,both the explosion pressure and the ex-plosion pressure rise rate on the diagonal of back wall are the largest,and the curve oscillation is the most obvious.The area closer to the explosion-proof gap is subjected to energy reduction,and the pressure value is low,while the explosion pressure of the measuring point with the same distance from the ignition source on the same wall is equal.The research results can pro-vide some reference for the reasonable design of standard explosion-proof shell and the improvement of inspection accuracy.
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