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为了研究点火能量对瓦斯爆炸传播压力的影响,在封闭的全管道瓦斯-空气混合气体中,进行不同点火能量条件下瓦斯爆炸传播实验,并对瓦斯爆炸压力峰值和呈现时间进行了分析研究:瓦斯爆炸压力峰值在爆源点附近先降低,传播一段距离后出现拐点,压力开始上升且在出口附近达到最大值;点火能量越高,爆炸压力峰值越大;在点火能量一定时,瓦斯爆炸压力峰值与管道长径比呈二次函数关系Y=AX2+BX+C;在管道长径比一定时,瓦斯爆炸压力峰值与点火能量呈二次函数关系Y=A1W2+A2W+A3;瓦斯爆炸压力峰值在爆源附近呈现时间最晚,而在出口附近呈现时间最早;点火能量越大,瓦斯爆炸压力峰值呈现时间就越短。
In order to study the influence of ignition energy on the pressure of gas explosion, gas explosion propagation experiment under different ignition energy conditions was conducted in the closed full-pipe gas-air mixture gas. The peak pressure and time of gas explosion were analyzed. The peak value of explosion pressure decreases first around the explosion point, and after the propagation of a certain distance, the inflection point appears, and the pressure starts to rise and reaches the maximum around the exit point. The higher the ignition energy, the larger the peak explosion pressure. When the ignition energy is constant, the peak value of gas explosion pressure Which is a quadratic function relationship with the pipe length-diameter ratio Y = AX2 + BX + C; when the pipe length-diameter ratio is constant, the peak value of gas explosion pressure is quadratic with the ignition energy Y = A1W2 + A2W + A3; The time near the explosion source is the latest but the time is near the exit. The larger the ignition energy, the shorter the peak pressure of gas explosion appears.