Numerical Investigations for Sealing Efficiency of the Turbine Rim Radial Seal

doi:10.7652/xjtuxb201409010

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Numerical Investigations for Sealing Efficiency of the Turbine Rim Radial Seal

更新时间：2025-07-09

- Numerical Investigations for Sealing Efficiency of the Turbine Rim Radial Seal
- Vol. 48, Issue 9, Pages: 55-61(2014)
- 作者机构：
  
  西安交通大学叶轮机械研究所,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201409010
  CLC： TK474.7
- Online First：10 September 2014，
  
  Published：2014
- 稿件说明：
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Numerical Investigations for Sealing Efficiency of the Turbine Rim Radial Seal[J]. 2014, 48(9): 55-61.
DOI：

Numerical Investigations for Sealing Efficiency of the Turbine Rim Radial Seal[J]. 2014, 48(9): 55-61. DOI： 10.7652/xjtuxb201409010.

摘要

通过SST湍流模型求解三维Reynolds-Averaged Navier-Stokes(RANS)方程组

研究了涡轮径向轮缘密封封严特性

采用附加变量法研究了主流入侵程度

数值计算获得的主流通道压力及轮缘密封封严效率分布与实验数据吻合良好

在此基础上研究了几何结构参数对涡轮径向轮缘密封的封严性能的影响规律。结果表明:径向轮缘密封封严效率随着密封内齿长度的增加而升高

随着径向间隙尺寸的减小而升高; 密封径向内齿向下倾斜时

密封封严效率提高; 与径向内齿安装在静盘侧相比

安装在动盘侧时的密封封严效率更高; 密封的轴向及径向等几何参数一定时

采用迎风齿结构可以提高径向轮缘密封的封严性能。

Abstract

The sealing efficiency of turbine rim radial seal is numerically investigated by 3-D Reynolds-averaged Navier-Stokes(RANS)equations and SST turbulence model

and the additional passive tracer method is used to simulate the mainstream ingestion phenomenon. The rim seal experimented in Bath university is selected as the calculation objective to verify the numerical accuracy

and the predicted distribution of pressure in blade passage and sealing efficiency of the rim seal at different cooling flow rates well agree with the experimental data. The influence of geometry parameter on sealing effectiveness of turbine radial rim seal is numerically investigated. The numerical results show that sealing efficiency of the rim seal increases with increasing inner fin length; the sealing efficiency of rim seal increases with decreasing radial clearance; the rim seal set with inner fin set on rotor disk has the higher efficiency than that on stator disk. With the same axial and radial parameters

upwind fin structure can improve the sealing performance of the radial rim seal.

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references

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