火焰筒压力损失对贫油熄火特性和燃烧效率的影响

以3.0%火焰筒压力损失火焰筒作为基准,分别设计了2.5%和2.0%火焰筒压力损失的火焰筒,通过试验研究火焰筒压力损失对贫油熄火性能及燃烧效率的影响.在模拟慢车状态下,低压力损失方案均比基准方案的贫油熄火油气比低,2.5%方案的贫油熄火油气比最低;在模拟高温高压状态,3种方案火焰筒燃烧效率对火焰筒压力损失不敏感.综合比较地面起动点火试验结果,在该基准上将火焰筒压力损失降低至2.5%不会对燃烧室综合燃烧性能造成不利影响. 

Effects of liner pressure loss on combustor lean blow-out and combustion efficienly performances

Based on a liner with 3.0% pressure loss liner, two low pressure loss liners (2.5% and 2.0%) were designed.The light lean ignition experiments were conducted to study the effect of liner pressure loss on the combustor lean blow-out and combustion efficiency.Under the idle conditions, the lean blow-out fuel air ratios of low pressure loss liner were lower than that of the baseline liner, and 2.5% pressure loss liner had the lowest.Under the high pressure and high temperature connditions, the low pressure loss had no effect on the combustion efficiency.Compared with the results of ignition, it was acceptable to reduce the liner pressure to 2.5% without negative effect on the combustion characteristic of combustor.