基于Matlab/Simulink的航空发动机稳态求解方法研究

基于Matlab/Simulink仿真环境,结合GSP软件提供的通用部件特性,建立了某型大涵道比涡扇发动机的部件级模型.以此模型为基础,建立流量平衡与功率平衡的非线性方程组,并选取高低压转速以及发动机各部件压比为初猜值,对发动机设计点进行稳态求解.对比分析了牛顿-拉夫僧法、拟牛顿法和最速下降法的求解数据,最终选择拟牛顿法作为本发动机模型的稳态求解方法.

Research on Steady State Solution of Aeroengine Based on Matlab/Simulink

Based on Matlab/Simulink simulation environment , general components combined with the characteristics of the GSP software to establish the component level model of a certain type of high bypass ratio turbofan engine .Based on this model ,the nonlinear equations of flow balance and power balance are established ,and the high and low pressure speed and the pressure ratio of each part of the engine are se -lected as the initial guess value to solve the engine design point .The results of Newton Raphson method , quasi Newton method and steepest descent method are compared and analyzed.