飞机/发动机一体化评估系统研究

AIRCRAFT / PROPULSION INTEGRATED ASSESSMENT SYSTEM

本课题研究了一种快速的飞机/发动机一体化评估方法和软件,其主要特点是根据飞机飞行任务要求,同时对飞机/发动机系统的主要设计变量(如飞机起飞推重比、翼载、机翼几何参数和发动机循环参数等)进行有约束多目标优选,求得最佳方案。优选的目标函数和约束条件由飞机战术技术要求和飞行任务确定。 应用此评估系统,曾对某型歼击机进行改型方案论证。计算结果表明:优选后的飞机性能有明显改善;飞行任务要求不同,最佳方案飞机的推重比、翼载、机翼外形和发动机循环参数也不同。使用本系统方便和快速,每计算一个方案在IBM4341计算机上,所需CPU时间在1min以内。本评估系统适用于战斗飞机/发动机的设计和改型,经扩充后也可推广到民用飞机/发动机的方案论证工作。

The Aircraft / Propulsion Integrated Assessment System is a computer aided assessment system developed for the conceptual and preliminary design phase of modern military aircraft. This system, for various missions and technical development levels, enables to evaluate a wide range of combinations of aircraft configuration and engine (turbojet or turbofan)or to obtain the optimal solution with the numerical algorithm for multiobjective optimization with constraints.A series of mission and aircraft / propulsion project, including the present aircraft modification and the future aircraft development, has been studied. During the optimization process, the best combinations of design parameters are selected. It is noted that the aircraft / propulsion system performance has been improved obviously.In addition, to use this system does not require considerable input and user experience. The output is easy to understand too. An aircraft / propulsion project analysis by the system requires less than 1 minute of CPU time(IBM4341)