School of Energy,Xi’an University of Science and Technology,Xi’an ,China

为了快速导出爆炸热量来抑制爆炸波的热破坏作用,最大限度降低爆炸时火焰和压力波耦合作用危害,提出一种新型热管泡沫复合抑爆结构。基于实例计算及数值模拟方法分析了泡沫金属及热管复合结构用于阻火器抑爆的效果。计算结果表明,内置泡沫铁镍金属可使爆炸温度降低率达8.9%,内置复合热管通过相变形式可以快速导出1.71×1012J能量。建立了该热管泡沫复合结构的数学模型,发现新型热管泡沫复合结构在0.095 s内可使火焰温度衰减至1 600 K,从而热管泡沫复合结构可以使得火焰压力波得到有效衰减。对比了管道内CH4和CO2浓度分布情况,表明热管泡沫复合结构管道轴线处CH4体积分数能够控制在4.5%左右,从而证实了该热管泡沫复合结构用于抑制爆炸的可行性。

In order to quickly derive the explosion heat to restrain the heat destruction role of the explosion waves,the explosion could maximally reduce the coupling function danger of the flame and pressure wave. A new heat pipe foam composite explosion suppression structure was provided. Based on the actual calculation and the numerical simulation method,the flame arrester explosion suppression effect of the foam metal and the heat pipe composite structure was analyzed. The calculation results showed that the built-in foam iron nickel metal could make the explosion temperature reduced by 8.9% and with the phase transition mode,the built-in composite heat pipe could rapidly derive the 1.71×1012 J energy. A mathematical model of the heat pipe foam composite structure was established. The new heat pipe foam composite structure showed that within 0.095 seconds,the flame temperature could be reduced to 1 600 K.Therefore,the heat pipe foam composite structure could effectively lose the flame pressure wave. In comparison with the CH4 and CO2 concentration distribution conditions in the pipe line,the CH4 concentration at the shaft line of the pipe line in the heat pipe foam composite structure could be controlled about 4.5%. Thus the feasibility of the heat pipe foam composite structure applied to the suppression of the explosion was verified.

国家自然科学基金青年科学基金资助项目(51504188)；