某型飞机/发动机一体化性能计算

研究了飞机/发动机一体化性能计算模型,并开发了一套相应的可视化计算软件.计算模型包括发动机非安装性能计算模型,进气道、尾喷管/后体特性转换模型,安装性能计算模型以及飞机性能计算模型.根据进气道、尾喷管安装特性法(INSTAL),利用进气道、尾喷管/后体特性转换程序求出实际的进气道、尾喷管安装特性,结合非安装性能计算程序,计算了发动机安装性能,并在此基础上计算了飞机性能.该软件已用于某型飞机的一体化性能计算,使用结果表明:①与经验公式法相比,采用INSTAL所得发动机安装性能估算结果与资料值接近程度普遍提高,最高可提高13％；②该软件计算结果合理,计算所需时间短,计算精度较高.

Calculation of integrated performance for aircraft/engines

An integrated performance computing model for aircraft/engines was studied,and a visual software based on the model was further developed.The model consisted of engine's uninstalled performance computing model,inlet and nozzle/aftbody performance characteristic transferring model,engine's installed performance computing model and flight performance computing model.Using inlet and nozzle installation methods(INSTAL),the installed engine performance was calculated in conjunction with uninstalled engine performance and installed performance characteristics of the inlet and nozzle/aftbody which had been obtained through inlet and nozzle/aftbody installation transferring program.Based on above study,the aircraft performance was calculated as well.The software was applied to estimate integrated performance of a certain aircraft.The results show: (1) comparing with the empirical formula method, the degree of closeness between the estimation of installed engine performance using INSTAL and the data from designer is increased in general, and it can be increased by 13% in maximum; (2) the calculating results are reasonable with short executing time and high accuracy.