航空发动机叶轮机部件低状态特性的指数预测方法
Exponent Extrapolation Method of Aero-Engine Turbomahinery Low State Characteristics
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摘要: 介绍了一种预测航空发动机叶轮机部件低状态特性的指数预测模型。该模型考虑到空气可压缩性的影响,运用相似理论,结合发动机的部件特性关系,得到了两个指数值,进而得到了发动机的低状态部件特性。数值模拟表明,该方法的精度较高,对研究发动机的起动特性特别是在高原使用时存在的起动问题具有重要的指导意义。Abstract: The exponential model that could extrapolate the Aero-engine turbomachinery low state characteristics was introduced.This model takes into account the influence of air compressibility.Applying the theory of similarity and considering the characteristics of aero-engine component performance,two exponent values can be obtained,and then the components low state characteristics can be deduced.The results show that the accuracy of this method is higher than that of numerical simulation.It is useful for the research of engine starting,especially for solving the start-up problem in plateau.
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