凹腔对一体化支板火焰稳定器燃烧性能的影响

在来流温度为780~850℃、来流马赫数为0.16及油气比为0.002~0.006的条件下，试验研究了凹腔对喷油/稳定一体化支板火焰稳定器燃烧效率及熄火性能的影响，并结合数值模拟进行辅助分析。结果表明:在不同油气比条件下，带凹腔的一体化支板火焰稳定器均能实现稳定高效燃烧；不带凹腔的一体化支板火焰稳定器燃烧效率始终低于带凹腔的一体化支板火焰稳定器，随着油气比的增加,两者燃烧效率差距逐渐缩小；带凹腔的一体化支板火焰稳定器较不带凹腔的一体化支板火焰稳定器有更好的熄火性能；凹腔结构促进了燃油雾化与蒸发，从而提高一体化支板火焰稳定器的燃烧性能。 

Effect of cavity on combustion characteristics of integrated strut flame stabilizer

Effect of cavity on combustion efficiency and blow off characteristic of fuel injection/stabilization integrated strut flame stabilizer were experimentally investigated under the condition of incoming flow temperature 780-850℃, incoming flow Mach number 0.16, fuel air ratio 0.002-0.006. Numerical simulation was also used to assist analysis. The results show that integrated strut flame stabilizer with cavity could achieve stable and high efficiency flames under the condition of various fuel air ratios; combustion efficiency of integrated strut flame stabilizer without cavity is worse than that of the integrated strut flame stabilizer with cavity, the differences between the integrated strut flame stabilizer with cavity and without cavity decreases gradually with the increase of fuel air ratio; the flame stabilizer with cavity performs better on blow off than flame stabilizer without cavity. Cavity structure could promote the atomization and evaporation characteristic of fuel, and improve combustion characteristics of integrated strut flame stabilizer.