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介绍了Fibonacci搜索方法应用于发动机性能优化中的原理,建立带两个出口面积、气流马赫数可变的引射器的涡喷发动机的总体性能计算模型,应用Fibonacci搜索方法在优化参数区间内对该发动机进行了最大推力、最低油耗、最低涡轮前温度模式的寻优.举例说明了Fibonacci搜索方法应用的具体过程.给出了不同高度、马赫数下的寻优结果.结果表明:最优目标性能满足的约束边界与飞行高度、马赫数密切相关.不同的飞行高度、马赫数对应了不同的最优控制策略.但不论飞行任务如何,根据该方法进行的优化控制所获得的目标性能是最佳的.该优化方法不仅适用于该类涡喷发动机,也为其他类型航空发动机的优化控制打下一定的基础.
The principle of Fibonacci search method applied in engine performance optimization is introduced. The general performance calculation model of turbojet engine with two ejector ejectors whose gas Mach number is variable is established. The Fibonacci search method is used to optimize the performance of the engine. The engine is optimized for the maximum thrust, the lowest fuel consumption and the lowest temperature before the turbine.Examples of the specific process of the Fibonacci search method are given.The optimal results under different heights and Mach numbers are given.The results show that the optimal target The constraint boundary satisfied by the performance is closely related to the flight altitude and the Mach number. The Mach numbers correspond to different optimal control strategies at different flight altitudes. However, the optimal control performance achieved by this method is the most optimal The optimization method not only applies to such a turbojet engine, but also lays a foundation for the optimization control of other types of aeroengine.