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对具有不同静叶稠度的轴流涡轮基元级的非定常流动情况进行了数值模拟,考察了静叶稠度对涡轮基元级转子的非定常势干涉、静叶尾迹与动叶的干涉及基元级性能非定常性的影响,探究了静叶稠度对转静干涉的影响机制.研究结果表明:当静叶稠度增加时,转子的非定常势干涉在上游静子中的扰动强度增加,但衰减加快,传播范围变短;静叶稠度的改变通过引起静叶尾迹的强弱、尾迹与动叶干涉的频率和动叶通道中的流动状态的变化来改变尾迹干涉的强弱;进而通过尾迹干涉强弱的改变影响基元级性能的非定常性.
Numerical simulations of the unsteady flow at the elemental level of axial flow turbine with different static blade consistency were carried out. The effects of stator blade consistency on the unsteady rotor interference, stator blade wake and blade interference Elemental instability, the mechanism of stator vane consistency on static interference is explored.The results show that when the consistency of vane increases, the disturbance intensity of unsteady rotor interference in the upstream stator increases, but the attenuation And the range of propagation is shortened. The change of the static blade’s consistency changes the strength of wake interference by causing the variation of stator blade wake, the frequency of wake and blade interference and the flow state in the rotor blade passage. Changes in strength affect the instability of primitive performance.