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通过数值计算对带有尾缘开槽结构的突肩叶尖间隙流场结构、泄漏流量、泄漏损失、表面传热系数进行了对比研究.研究结果显示:相比全突肩叶尖,吸力侧尾缘开槽突肩叶尖可以改变开槽附近泄漏流的流动路径,有效抑制其与主流的掺混.压力侧尾缘开槽和吸力侧尾缘开槽均会增加间隙泄漏流量.压力侧尾缘开槽突肩叶尖会增加间隙泄漏损失,开槽长度越大损失越大.研究范围内的吸力侧尾缘开槽均会减小间隙泄漏损失,但存在最佳开槽长度.压力侧和吸力侧尾缘开槽均会轻微地增加叶尖表面传热系数.
The flow field structure, the leakage flow, the leakage loss and the surface heat transfer coefficient of the tip-tip clearance with the trailing edge slotted structure were studied numerically.The results show that compared with the full shoulder blade tip, the suction side The trailing edge slotted shoulder tip can change the flow path of the leakage flow near the slot and effectively restrain its mixing with the mainstream. Both the pressure side trailing edge slotting and the suction side trailing edge slotting will increase the clearance leakage flow. The trailing edge slotted shoulder tip increases the gap leakage loss, the greater the slotted length, the greater the loss. The suction side trailing edge slotting within the study area will reduce the gap leakage loss, but there is an optimal slot length. Side and suction side of the trailing edge of the groove will slightly increase the tip surface heat transfer coefficient.