基于三阶MG模型的轴流压气机过失速的非线性分析

Nonlinear Analysis on Post-Stall Transients of Axial-Flow Compressor Based on Moore-Greitzer Model

在三阶Moore-Greitzer模型的基础上,分析了轴流压缩系统方程中存在的静态分叉行为;同时,分析了在分叉参数作用下平衡点稳定性的变化情况,以及由于分叉造成的失速延迟行为。最后在γ-β分叉参数空间中,划分了系统流动行为区域图,在该图基础上,可以根据分叉参数的情况,对压缩系统的流动行为作简便的预测。这种分析方法,也是轴流压缩系统分叉控制的基础。

Based on three-order Moore-Greitzer model of axial flow compressor, the static bifurcation analysis in axial flow compressor is accomplished. With the bifurcation parameters, the stability of system equilibriums is investigated as well as the stall delay caused by bifurcation. And, in the parameter space of parameter B and the throttle parameter γ, the sketch map for various flow behaviors of compressor is plotted out qualitatively, which is instructive to predict the flow in axial flow compressor with system parameters and to carry out active bifurcation control.