军用飞机,发动机战技性能评估研究

飞机、发动机战技性能的评估,无论对于改型论证工作,或者对于新机论证和初步设计都有极其重要的意义。本文介绍了由北航研究发展的飞机/发动机一体化评估系统(简称为AEAS),以及利用AEAS对军用飞机/发动机(涡喷或涡扇发动机)组合方案战技性能评估研究的一些结果。还讨论了利用AEAS具有的优选功能,根据飞机飞行任务和战技性能要求,分别或同时对飞机/发动机系统主要设计变量(如飞机起飞推重比,翼载,机翼外形几何参数和发动机循环参数等)的各种组合进行优选,求得最佳方案的算例。使用AEAS的初步经验表明,计算结果合理,计算精度和所需CPU时间适合于飞机/发动机系统方案论证和初步设计阶段工作的需要。

A STUDY OF MILITARY AIRCRAFT AND ENGINE TACTICAL/TECHNICAL PERFORMANCE EVALUATION

For the present aircraft mcdification and the new aircraft conceptual and preliminary design, aircraft and engine tactical/technical performance evaluation has very important significance. In this paper we will introduce the Aircraft/Engine Integratied Assessment System (AEAS) developed by Beijing University of Aeronautics and Astonautics (BUAA) and some results of military aircraft and engine (turbojet and turtofan) cambination project by use of AEAS. Especially some numerical optimal samples have also been dicussed by applying the parameter optimization module of AEAS to select the aircraft/engine system design variables, for example, the aircraft thrust/ weight ratio and wing loading for take off, wing cofiguration geometry parameters and engine cycle parameters with various constraints. The initial experience of employ AEAS has shown that the calculated results are reasonable and the computation acuracy and required CPU time are appropriate for conceptual and preliminary design of aircraft/engine systerm conbination project.