涡轮基组合循环发动机超级燃烧室燃烧性能试验

对涡轮基组合循环(turbine based combined cycle,TBCC)发动机超级燃烧室进行了试验研究.首先设计了超级燃烧室模型及相关的试验系统,并在此基础上开展了不同进口速度系数、温度和油气比下点火特性、贫油熄火特性和燃烧效率等燃烧室性能的试验研究.研究结果表明:随着内涵进口速度系数(0.10~0.25)的增加,点火当量比先减小后增加,熄火当量比逐渐增加,燃烧效率提高;随着内涵进口温度(573~873K)的增加,点火当量比和熄火当量比减小,燃烧效率提高;随外涵进口速度系数、温度的增加,燃烧效率提高.试验中获得最小点火当量比为0.984,最小熄火当量比为0.6.

Experiment on performance of a hyper-combustor utilized in turbine based combined cycle engine

Experiments were conducted on a hyper-combustor of the turbine based combined cycle engine. First a model hyper-combustor rig and experimental system were designed, and then experiments were conducted to study the combustion performance including ignition characteristic, lean blowout characteristic and combustion efficiency under different inlet velocity coefficient, inlet temperature and fuel/air ratio(FAR). The test results show that the ignition equivalence ratio firstly decreases and then increases,lean blowout equivalence ratio and combustion efficiency increase with the turbo duct inlet velocity coefficient increasing from 0.10 to 0.25.The ignition and lean blowout equivalence ratio decrease and combustion dfficiency increases when the turbo duct inlet temperature increasing from 573K to 873K. Similarly the combustion efficiency increases when the bypass duct inlet velocity coefficient or temperature increases. The minimum ignition and lean blowout equivalence ratio obtained from the experiment is 0.984 and 0.6 respectively.