针对 CO 单一燃料在模型燃烧室中进行常压贫熄特性实验，随着进口流量的增大，在低流量下(小于244,m3/h)余气系数略有减小，在流量区间244～292,m3/h 余气系数迅速减小，随着进口流量进一步增加(大于292,m3/h)，余气系数缓慢减小直至基本保持不变。同时，针对不同近贫熄点工况进行数值模拟，并结合实验结果给出模型燃烧室局部速度场等的分布，指出在进气流量高和低两种情况下近贫熄状态呈现明显不同的局部特征，阐明导致贫熄性能差异的原因。%The lean blowout of CO in model combustor under atmospheric pressure condition is studied experimen-tally. It is shown that,with the enhancement of inlet flow rate,the excess air coefficient(EAC) gradually decreases at low flow rate(below 244 m3/h),while it decreases rapidly at high flow rate(between 244 m3/h and 292 m3/h). And when the inlet flow rate increases further(higher than 292 m3/h),the EAC decreases slowly until it reaches a certain value,Meanwhile,numerical simulations are conducted under condition close to the lean blowout points,and the velocity field distribution in the model combustor is given. It is found that the fields show different local features at low and high flow rate,which is the reason for the difference in lean blowout.
展开▼
