Research on Control Law of High Speed Turbofan Engine

Based on the component maps based high speed turbine engine simulation model, the influence of design point parameters of the rotational speed of the fan, the corrected rotational speed of the fan, and the throat area of nozzle on engine's performance and control law is studied. With thrust, specific thrust and specific fuel consumption as performance parameters, the engine with different control laws is compared and evaluated, which provides a reference for the selection of high-speed turbofan engine design point parameters. The results show that: increase the value of the corrected rotational speed of the fan to use at design point, the engine velocity characteristic becomes better, the specific fuel consumption increases, and the engine size increases. Under the same value of corrected rotational speed of the fan to use at design point. the value of the rotational speed of the fan to use at design point increases, the engine velocity characteristic becomes better, the specific fuel consumption increases, and the engine size increases. Adjusting the throat area of nozzle keeps the rotational speed of the fan at the maximum in the wide Mach number range, while keeping the turbine inlet temperature and the rotational speed of the fan at the maximum, increasing the engine's thrust at high Mach numbers.