进气畸变对燃烧室性能的影响

基于详细化学反应动力学和火焰面模型，以某型发动机燃烧室为计算模型，在压气机气流畸变来流条件下对燃烧室内流场进行了数值模拟，将计算结果与其实验结果进行了对比，并对比研究了均匀与非均匀入口气流条件下燃烧室燃烧性能的差异。结果表明:非均匀入口效应会对燃烧室内部流场产生很大的影响，流场的对称性受到破坏，燃料的掺混燃烧效果也会受到影响，进而导致燃烧室燃烧效率降低，影响整个燃烧室的工作性能。增大主燃孔面积，提高头部进气量可以很好地改善此型燃烧室的燃烧性能。 

Effect of inlet distortion on performance of combustion chamber

Under the non-design condition, there is obvious flow distortion in the compressor flow. The obvious non-uniform air field from the outlet of the compressor has an important influence on the performance of the combustion chamber. The differences of combustor performance under the uniform and non-uniform inlet flow conditions with a detailed chemical reaction kinetics and a diffusion flamelet model were studied. Calculated results were in good agreement with the experimental data. Results showed that the non-uniform inlet flow destroyed the symmetry of the flow field and resulted in an obvious reduction in combustion efficiency. The combustion efficiency was improved by increasing the area of primary combustion holes.