Effects of attack angle and endwall slippage on flow and heat transfer of blade squealer tip

LI Guangchao; ZHANG Zhandong; ZHANG Wei; KOU Zhihai

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Effects of attack angle and endwall slippage on flow and heat transfer of blade squealer tip

Thermal Power Generation Issue 1, (2016)

更新时间：2025-09-28

- Effects of attack angle and endwall slippage on flow and heat transfer of blade squealer tip
- 作者机构：
  
  沈阳航空航天大学辽宁省航空推进系统先进测试技术重点实验室,辽宁,沈阳,110136
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK47
- Published Online：15 February 2016，
  
  Published：2016
- 稿件说明：
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LI Guangchao, ZHANG Zhandong, ZHANG Wei, et al. Effects of attack angle and endwall slippage on flow and heat transfer of blade squealer tip[J]. Thermal Power Generation, 2016, (1).
DOI：

LI Guangchao, ZHANG Zhandong, ZHANG Wei, et al. Effects of attack angle and endwall slippage on flow and heat transfer of blade squealer tip[J]. Thermal Power Generation, 2016, (1). DOI：

摘要

以某燃气轮机高压涡轮动叶为研究对象

在主流雷诺数为9×104条件下

对进气攻角分别为-5°

0°

5°以及端壁有、无滑移时的凹槽叶顶旋涡结构和换热系数进行了数值模拟及实验验证。结果表明:压力系数模拟计算结果与实验数据吻合较好

说明本文数值模拟结果有效；无端壁滑移时

叶顶靠近压力面侧前缘产生的泄漏涡向吸力面和尾缘同时发展

叶顶换热系数沿叶型中弧线方向减小；端壁滑移缩小了泄漏涡尺度

泄漏流均匀地从压力面流向吸力面；叶顶换热系数沿垂直于弦长方向减小；端壁滑移虽然降低了间隙内泄漏流速度

但却使叶顶平均换热系数略有增大；端壁滑移使3种攻角的叶顶最高换热系数分别降低了7.5％

8.1％和19.2％；攻角从-5°变化到5°

端壁滑移和无滑移时的最高换热系数分别降低了14.9％和22.4％

无论端壁有无滑移

叶顶平均换热系数均降低了约11.8％。

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LI Guangchao

KOU Zhihai

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Related Institution

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