航空活塞发动机高空特性研究

Study on High Altitude Characteristics of Aircraft Piston Engine

针对高空长航时无人机动力需求,以某型一级涡轮增压航空活塞发动机为研究对象,建立仿真模型,并根据测功机台架试验数据及手册提供数据对仿真模型校核,验证模型准确性,在此基础上,通过仿真模型探索发动机高空安全使用边界及发动机高空性能,最后通过装机飞行验证高空发动机工作稳定性及安全性。结果表明:仿真模型准确性较高,可以用于发动机高空性能研究;仿真模型可以给出发动机不同海拔高度下的可用工作范围及性能参数;同时通过装机飞行,在高空安全边界可用工作范围内,发动机运行稳定。

Aiming at the power requirements of high-altitude and long-endurance UAVs,a certain type of turbocharged aircraft piston engine is taken as the research object,a simulation model is established,and the simulation model is checked and verified according to the dynamometer bench test data and manual data Based on the accuracy of the model,the simulation model is used to explore the safety boundary at high altitude and the high-altitude performance of the engine.Finally,the working stability and safety of engine are verified through the installed flight.The results show that the simulation model has high accuracy and can be used to study the high-altitude performance of the engine;the simulation model can give the available working range and performance parameters of the engine at different altitudes;at the same time,through the flight,the engine runs stably within the available working range of the safety boundary.