星型航空活塞发动机增压匹配及控制参数研究

Turbocharging Matching and Control Parameters of Radial Aero-Piston Engine

关键词:  活塞发动机  高空功率恢复  涡轮增压  增压匹配  控制策略

Key words:  Piston engine  High altitude power recovery  Turbocharging  Boost matching  Control strategy

摘要:

针对某星型航空活塞发动机在高海拔地区的功率衰减问题，开展增压匹配及控制策略研究。利用GT-Power建立星型发动机的性能匹配仿真模型，并通过试验对仿真模型进行了校核；在此基础上匹配了涡轮增压器，建立增压发动机模型。进行了0~8km不同飞行高度条件下的增压匹配与发动机功率随海拔高度的匹配计算；根据计算结果设计了废气旁通阀开度控制策略并得到了喷油点火控制参数的影响规律。研究结果表明：为星型活塞发动机所匹配的废气涡轮增压系统，可使发动机在8km海拔高度时功率恢复到地面功率的83%，较原机8km海拔高度功率提升了90%，可很好满足飞机对发动机高空功率恢复需求。

Abstract:

To solve the problem of power attenuation of a radial aero-piston engine in high altitude areas， the boost matching and control parameters research were carried out. A performance matching simulation model of the radial engine was established by GT-Power， and the simulation model was checked by experiments. On this basis， turbochargers were matched to establish a supercharged engine model. The calculation of boost matching and engine power matching at different flight altitudes from 0~8km was carried out. Based on the calculation results， the control strategy of exhaust gas bypass valve opening was designed and the influence law of injection and ignition control parameters was obtained. The research results show that the exhaust gas turbocharging system matched for the radial piston engine can restore the power of the radial engine to 83% of the ground power at an altitude of 8km， which is 90% higher than that of the original engine at an altitude of 8km. This scheme can well meet the aircraft’s demand for high-altitude power recovery of the engine.