依据试验数据求取航空发动机部件特性的新方法

介绍了通用的依据已知发动机部件特性求取所需部件特性的耦合法,并指出该方法的不足。以压气机部件特性为例提出求取部件特性的新方法。该方法利用发动机试验数据得到转速线与共同工作线的交点,把转速线近似为指数函数曲线,由PSO算法结合所得的交点数据拟合出每条转速曲线。以试验数据为依据,保证了特性的真实和有效性,而PSO算法则提高了特性线拟合的精度。计算结果表明所提出的方法比传统的耦合法更为准确,有利与提高发动机工作过程仿真精度。

A New Component Map Generation Method of Aero Engine Based on Experimental Data

Traditional scaled method which generates new engine component map according to the known map was introduced.The defect of scaled method was point out.A new component map generation method was proposed with the example of compressor map.First the intersectional points of rotational speed line and common operating line were acquired from experimental data,and then the rotational speed line was set as the exponential function approximately.Every rotational speed line function was fitted using PSO algorithm on...