起动过程轴流压气机的模型化

 本文提出了一种轴流压气机在低转速下（对应发动机由风车到慢车状态起动范围内）的模型化方法。利用文献〔1〕提供的模型结构式,提出了确定结构式系数矩阵的分步回归方法。模型计算与实验结果是一致的。

MODELLING AN AXIAL-FLOW COMPRESSOR IN STARTING OF A TURBOJET ENGINE

A method of modelling an axial-flow compressor in low speed starting regime from windmilling to idling of an engine is presented. A structural formula for the model is established according to ref. . A method of step-by-step regression is proposed for determining the coefficient matrices of the structural formula. The coefficient functions are determined on the basis of the square, linear and constant terms of the mass flow coefficient respectively in the mathematical model, meanwhile in each portion of the regression the rotor speed is considered to approach zero due to the feature of very low speeds. In result the model represents the performance of the compressor at low speeds very well. Good agreement is obtained between the computational and experimental results.