浓度梯度对甲烷-空气混合气体爆炸特性参数的影响

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Abstract In order to study the influence of concentration gradient on combustion and explosion characteristics of methane-air premixed gas, pressure and temperature sensors were arranged in a square explosion experimental pipeline to perform explosion experiments of methane-air premixed gas under different methane concentration gradients.The results showed that with increase in concentration gradient, the average flame velocity and the maximum explosion pressure of methane-air premixed gas in the pipeline increase firstly and then decrease, and both reach the maximum when the concentration gradient is 1.0%; the rising rate of explosion pressure increases firstly and then decreases with increase in concentration gradient, and reaches the maximum when the concentration gradient is 1.5%; with increase in concentration gradient, the time to reach the maximum explosion pressure presents a reciprocating trend; with increase in concentration gradient, the explosion temperature of methane-air mixture firstly increases and then decreases.

Key words： concentration gradient square pipeline explosion pressure pressure rising rate

Received: 20 January 2020 Published: 15 June 2021

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	LI Zhe
	CHEN Xianfeng
	SUN Weikang

Cite this article:

LI Zhe,CHEN Xianfeng,SUN Weikang. Effect of concentration gradient on explosion characteristic parameters of methane-air mixture[J]. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(11): 26-32.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2021/V40/I11/26

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