Measures to improve anti-knock quality for four-stroke ignited kerosene aviation engine

A one-dimensional performance simulation for a four-stroke ignited turbocharging aviation engine with different fuels was made by an engine performance simulation software GT-Power to optimize the anti-knock quality. Through the reasonable adjustment of the compression ratio, boost pressure, air-fuel ratio, cylinder diameter, ignition timing, knock tendency of the engine using the new fuel was optimized, and engine's main output parameters were roughly maintained. When replacing the No. 93 gasoline fuel with a new type fuel of 61 octane number, the power can reach 89% of the original power output after using the method without expanding the diameter of the cylinder and 95% after using the method of expanding the diameter of the cylinder; the specific fuel consumption increased about 5.4% and 6.1%, respectively; and the exhaust temperature increased about 11.4% and 13.4%, respectively.