航空发动机进发匹配优化研究

为降低进气压力畸变对发动机的需用稳定裕度需求,分别从发动机和进气道2个方面开展优化匹配研究。在发动机方面,通过降低转速的方式来降低进气畸变,评估结果表明:采用该方案对发动机剩余裕度增大效果不明显。在进气道方面,局部优化进气道防护网结构,经过进发联合试验验证表明:采用该措施可降低进气压力畸变相对量20.4%～32.6%。经过发动机逼喘试验验证,畸变改善效果显著,大大降低了发动机喘振概率,可在现役飞机进气道上推广使用。

Research on Optimization of Inlet and Engine Matching of Aeroengine

In order to reduce the demand of engine required stability margin for intake pressure distortion, the optimal matching ofengine and inlet were carried out respectively. In the aspect of engine, the intake distortion was reduced by reducing the rotating speed. Theevaluation results show that the effect of this scheme on the increase of engine residual margin is not obvious. In the aspect of inlet, theprotective network structure of inlet was optimized locally. The inlet-engine combination test shows that the relative distortion of intakepressure can be reduced by 20.4%~32.6%. The results of engine surge test show that the distortion is improved significantly, and theprobability of engine surge is greatly reduced, which can be popularized and used in the inlet of service aircraft.