Numerical Study of High Temperature Heat Pipe to Suppress Gas Explosion

Abstract

As a new type of heat transfer element, high temperature heat pipe has high heat transfer efficiency and broad prospects in suppressing gas explosion shock wave and flame. In this paper, the mechanism and effect of gas explosion suppression in high temperature heat pipe were analyzed by theoretical analysis and numerical simulation. ANAYS FLUENT was used to simulate the propagation process of gas explosion, and the simulation results were in good agreement with the experimental results. The influence of high temperature heat pipe on gas explosion propagation characteristics under different working conditions was studied. The results show that the flame propagation speed of gas explosion in the roadway with high temperature heat pipe is reduced, which will have nearly twice the time delay, the peak value of flame temperature is reduced, and the maximum overpressure of gas explosion in the roadway after the high temperature heat pipe is far lower than the maximum overpressure when the high temperature heat pipe is not laid. The layout of high temperature heat pipes in the roadway has different degrees of influence on the explosion suppression effect, and the best explosion suppression effect is achieved when the high temperature heat pipes are placed at 10 m intervals and inclined at 90°. The application of high temperature heat pipe technology to restrain gas explosion has certain feasibility, and the research results are of great significance to the safe and efficient production of coal mines.