突肩叶尖尾缘开槽对间隙流动换热特性的影响

成锋娜; 常海萍; 张镜洋; 田兴江; 杜治能

doi:10.13224/j.cnki.jasp.2016.02.017

突肩叶尖尾缘开槽对间隙流动换热特性的影响

doi: 10.13224/j.cnki.jasp.2016.02.017

1. 南京航空航天大学能源与动力学院江苏省航空动力重点实验室, 南京 210016;
2. 南京航空航天大学航天学院, 南京 210016;
3. 中国航空工业集团公司沈阳发动机设计研究所, 沈阳 110015

基金项目:

江苏省研究生培养创新工程(KYLX_0306)

国家自然科学基金(51406085)

中央高校基本科研业务费专项资金

详细信息

作者简介:
成锋娜(1988-),女,山西晋城人,博士生,主要从事航空发动机高温部件冷却技术研究.

中图分类号: V231.1
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出版历程
- 收稿日期: 2015-04-29
- 刊出日期: 2016-02-28

Tip leakage flow and heat transfer characteristics with effect of trailing edge cutback on squealer tip

1. Jiangsu Province Key Laboratory of Aerospace Power System, College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
2. College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
3. Shenyang Engine Design and Research Institute, Aviation Industry Corporation of China, Shenyang 110015, China

摘要

摘要: 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.
- 涡轮 /
- 叶尖间隙 /
- 泄漏流量 /
- 泄漏损失 /
- 表面传热系数
Abstract: Comparative study was carried out to investigate the leakage flow field, leakage mass flow rate, leakage flow loss and surface heat transfer coefficient of trailing edge cutback on squealer tips by numerical simulations. Research results show that the suction side trailing edge cutback on squealer tips can change the leakage flow path near the cutback area, and suppress the mixing of the leakage flow and the main stream effectively compared with the cavity tip. Both suction and pressure sides trailing edge cutback on squealer tips can increase the leakage mass flow rate. Pressure side trailing edge cutback on squealer tips can increase the tip clearance leakage flow loss with the increase of cutback length. Suction side trailing edge cutback on squealer tips within the studied range can decrease the tip leakage flow loss, but there is an optimum cutback length. Both pressure and suction sides trailing edge cutback on squealer tips can increase the tip surface heat transfer coefficient slightly.
- turbine /
- tip clearance /
- leakage mass flow rate /
- leakage flow loss /
- surface heat transfer coefficient

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参考文献(18)

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