乙醇/甲烷/氢气预混气体爆炸特性研究

Study on the Explosion Characteristics of Ethanol/Methane/Hydrogen Premixed Gas

为了进一步了解C_(2)H_(5)OH/CH_(4)/H_(2)预混气体的爆炸特性,在定容燃烧弹内对不同当量比(0.7~1.4)、不同初始温度(370,400,450 K)、不同乙醇掺混比例(20%,50%,80%)的C_(2)H_(5)OH/CH_(4)/H_(2)预混气体的爆炸特性进行实验研究及分析。结果表明:爆炸压力峰值与初始温度呈线性负相关,与乙醇掺混比例呈线性正相关;随着当量比的增大,爆炸压力峰值和最大爆炸压力上升速率均呈现先增大后减小的规律,其峰值出现在当量比为1.2或1.3处,而爆炸时间呈现先降低后略有增大的规律;相同初始温度下,随乙醇掺混比例的增大,预混气体放热量增大,在当量比为1.2时达到峰值。

In order to further understand the explosion properties of C_(2)H_(5)OH/CH_(4)/H_(2)premixed gas,the experimental study and analysis were carried out for C_(2)H_(5)OH/CH_(4)/H_(2)premixed gases under conditions of different equivalent ratios(0.7~1.4),different initial temperatures(370,400,450K)and different adding ratios of ethanol(20%,50%,80%)in constant volume combustion bombs.The results show that the peak explosion pressure is negatively correlated with initial temperature,while has a positive linear correlation with the ethanol adding ratio;With the increase of equivalent ratio,the peak explosion pressure and the peak pressure rise rate all show the law of first increasing and then decreasing,the peak values appear in the equivalent ratio of 1.2 or 1.3,while the explosion time show the law of first decreasing then increasing slightly;As the same initial temperature,the heat release value of the premixed gas increase with the increase of adding ratio of ethanol,the value reaches maximum as the equivalent ratio of 1.2.