【摘要】 利用自行设计的燃烧管,用电热丝点火方式对不同浓度的甲烷—空气混和气体的燃爆和传播机理进行了研究。发现一定浓度的甲烷—空气混和气体,点火功率必须大于一定功率阀值才能将其点燃,且存在一定的点火延时期。实验条件下,被点燃的混和气体的燃爆传播速度呈先减小后增大的趋势。更多还原

【Abstract】 The combusting and blasting mechanism and transmitting mechanism of the methane-air mixture that is ignited by the electrical thermal wire are studied in this paper by using the combusting tube designed and made by ourselves. The results indicate there is a critical power value for a certain concentration mixture when the mixture is ignited by the electric thermal wire, and there is a delay time in this condition: The transmitting velocity of the flame interface has the trend of increasing firstly and decreasing subsequently after the mixed gases are ignited.更多还原