论文部分内容阅读
对均匀混气进口突扩燃烧室进行了数值研究，比较了燃烧状态和非燃烧状态突扩回流区。发现燃烧状态的回流区长度比非燃烧状态减小了３６％（混气当量比为０．６５）。分析了燃烧引起回流区长度减小的两个重要原因：温度梯度对速度矢量的偏折和加速作用以及热阻力作用。
A numerical study was conducted on a sudden expansion combustor with uniform gas inlet. The sudden expansion and contraction of the combustion zone and non-combustion zone were compared. The length of the recirculation zone at combustion was found to be 36% less than the non-combustion state (gas mixture equivalent ratio of 0.65). Two important reasons for the decrease of the recirculation zone length due to combustion are analyzed: the deflection and acceleration of the temperature vector by temperature gradient and the thermal resistance.