声能喷嘴供油级间驻涡燃烧室的性能试验

Abstract

对一种采用声能喷嘴供油方式的级间燃烧室进行了性能试验研究.试验结果表明:当进口马赫数为0.20~0.40,燃烧室的熄火余气系数为25~35,燃烧室的稳定工作范围较宽;随余气系数增大,出口温度分布均匀性提高;燃烧效率为96%~98%,随余气系数减小,燃烧效率降低;进口马赫数对点火性能、熄火性能、出口温度分布和燃烧效率的影响较小;壁面热点温度出现在凹腔的后壁面;总压损失系数为0.03~0.11,热态时比冷态时高0.015左右;CO和nOX的排放指数分别为20~46和0.9~2.1,进口马赫数、余气系数均对污染物排放有较大影响.

Performance of an interstage turbine burner with an acoustic energy nozzle was investigated experimentally.The experimental result shows that the air excess coefficient of lean blowout is in the range of 25~35 under the condition of Mach number being 0.20~0.40,and the range of stable combustion is relatively wide.The uniformity of outlet temperature distribution is improved with the increase of air excess coefficient.The combustion efficiency is in the range of 96%~98%,and it decreases as the air excess coefficient decreases.Inlet Mach number has little effect on ignition performance,lean blowout performance,outlet temperature distribution and combustion efficiency.The maximum wall temperature locates on the after-wall of the cavity.The total pressure loss coefficient is in the range of 0.03~0.11,and it is about 0.015 higher in hot state than in cold state.The emission index of CO is in the range of 20~46 and that of NOx is in the range of 0.9~2.1.The inlet Mach number and air excess coefficient both have significant effect on the pollutant emission.