星型航空活塞发动机增压匹配及控制参数研究

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.