关键词: 涡轮风扇发动机;涡轮叶栅;压气机部件;粘性流;气动热力学;一体化设计;数值仿真

Abstract: A quasi three dimensional flow Euler model with viscous force terms was constructed for integrated small turbofan engine systems. In the combustor , relative fuel mass chroma coefficient and non full combustion coefficient were suggested empirically.Grids in the flow passage and combustion chamber were generated by employing algebraic and elliptically partial differential equation composite methods.Three viscous losses coefficients in accordance with compressor rotors ,stators and turbine blades were defined separately.Flow calculating from engine inlet to exit were executed using high order Godunov scheme,time matching method and alternatively explicit/implicit schemes. Convergence was fast and the accuracy was satisfactory.The flow control characteristics and the effects of inner duct exit dimension on overall engine performances were presented by the program.The code could forecast the arbitrary steady characteristics of engine systems and be extended to simulations of transient states.

Key words: Turbofan engine;Turbine cascade;Compressor part;Viscous flow;Aerothermodynamics;Integrated design;Numerical simulation