航空发动机变几何涡轮增压性能研究

提出了一种变几何涡轮增压器用于发动机高空恢复功率的方法,并对其调节规律和相关特性进行研究。依据涡轮流动模型,分析了相同工况下不同喷嘴环开度对涡轮增压器工作的影响。在GT-POWER中建立了变几何涡轮增压发动机模型,通过全高度下不同工况的仿真分析,验证了变几何涡轮增压发动机恢复海平面功率的应用。结果表明,匹配了变几何涡轮增压器的发动机能够显著提高发动机高空可调范围,其使用升限从5 km提升到了6 km,对变几何涡轮增压器应用于恢复功率与喷嘴环开度的调节规律具有指导意义。

Research on performance of variable geometry turbocharger for aero engine

A variable geometry turbocharger method was used to adjust the power of the engine.It's regulation law and characteristics was studied.According to the turbine flow model,the influence of different nozzle ring opening degrees on the turbocharger was analyzed under the same operating conditions.In GT-POWER,a variable geometry turbocharger engine model was established,and the application of the variable geometry turbocharger engine to recover the power of the sea was verified by the simulation and analysis of different working conditions.The results show that the engine can significantly improve the engine altitude adjustable range,enhancing the ceiling of engine usage from 5 km to 6 km,which is of guiding significance for application of variable geometry turbocharger to restoring power and the regulation of nozzle ring opening degree.