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为了数值模拟弯曲静子对某两级低速轴流压气机总体性能及轮毂-角区失速的影响,选取了第1级静子进行弯曲。弯曲静子积叠线为贝塞尔曲线-直线-贝塞尔曲线(Bezier-line-Bezier,BLB)形式,弯高为20%叶片高度,弯角为10,15,20,25和30°。结果表明,弯曲叶片能有效抑制小流量范围内的轮毂-角区失速,从而改善压气机的性能。过度的弯曲会带来较大的叶型损失,从而导致大流量工况下压气机效率有所下降。扩散因子不能作为判断轮毂-角区失速是否存在的主要依据。
In order to simulate the effect of bending stators on the overall performance of a two-stage low-speed axial-flow compressor and the hub-corner stall, the first stage stator was selected for bending. Curved stator stack lines are in the form of a Bezier-line-Bezier (BLB) curve with 20% blade height and 10, 15, 20, 25 and 30 ° bend angles. The results show that the curved blade can effectively suppress the hub-corner stall in the low flow range and improve the performance of the compressor. Excessive bending will lead to greater loss of the blade, resulting in reduced compressor efficiency at high flow rates. Diffusion factor can not be used as the main basis to determine whether the hub-corner stall exists.