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采用二维非定常数值模拟的方法研究了动叶相对位置的改变对低速压气机气动性能的影响。结果显示不同的动叶相对位置会改变上游动叶尾迹与下游动叶之间的相对位置以及下游叶列周围的周期性和湍流性速度波动。当上游尾迹被输运到下游叶列前缘附近的时候 ,对应较高的级效率 ;当上游尾迹被输运到下游叶列流道中央的时候 ,对应级效率较低。正确的配置动叶的相对位置 ,将会显著减少第二列动叶表面流动的非定常性 ,对叶片气动性能有改善的作用。
A two-dimensional unsteady numerical simulation method is used to study the influence of the change of the relative position of the moving blades on the aerodynamic performance of a low-speed compressor. The results show that the relative position of different buckets changes the relative position between the upstream lobe and the downstream lobe and the periodic and turbulent velocity fluctuations around the downstream lobe. When the upstream wake is transported to the vicinity of the leading edge of the downstream leaf row, it corresponds to a higher stage efficiency. When the upstream wake is transported to the center of the downstream leaf column runner, the corresponding stage efficiency is lower. Correctly arranging the relative positions of the moving blades will significantly reduce the unsteady flow on the surface of the moving blades in the second row and improve the aerodynamic performance of the blades.