Numerical Investigation on the Effects of Rim Seal Diversion Configurations on Aerodynamic and Film Cooling Performances of Turbine Stage

doi:10.7652/xjtuxb201909004

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Numerical Investigation on the Effects of Rim Seal Diversion Configurations on Aerodynamic and Film Cooling Performances of Turbine Stage

更新时间：2025-07-09

- Numerical Investigation on the Effects of Rim Seal Diversion Configurations on Aerodynamic and Film Cooling Performances of Turbine Stage
- Vol. 53, Issue 9, Pages: 26-33(2019)
- 作者机构：
  
  1. 西安热工研究院有限公司,西安,710054
  2. 西热节能技术有限公司,西安,710054
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201909004
  CLC： TK472
- Online First：10 September 2019，
  
  Published：2019
- 稿件说明：
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Numerical Investigation on the Effects of Rim Seal Diversion Configurations on Aerodynamic and Film Cooling Performances of Turbine Stage[J]. 2019, 53(9): 26-33.
DOI：

Numerical Investigation on the Effects of Rim Seal Diversion Configurations on Aerodynamic and Film Cooling Performances of Turbine Stage[J]. 2019, 53(9): 26-33. DOI： 10.7652/xjtuxb201909004.

摘要

以轴向轮缘密封为研究对象

在传统直缝密封间隙结构的基础上

通过改变轴向外齿间隙区域的几何型线

设计了双曲线、椭圆及圆型密封导流段结构

数值求解了三维RANS方程组和SST湍流模型

并且系统深入研究了这4种不同导流段几何结构下轮缘密封射流对涡轮级的气动性能

以及对下游动叶端壁冷却性能的影响规律。研究结果表明:所设计圆型、椭圆型以及双曲型导流段结构均可提高涡轮级整体气动性能; 圆型密封导流段结构具有最佳的气动性能以及端壁气膜冷却效果。相比于直缝型导流段结构

采用圆型导流段结构在相同的冷气流量下

涡轮级效率可提高约0.23%; 在动叶前缘轮缘密封射流所覆盖的冷却区域

采用圆型导流段结构时冷却效率可提高约20%。

Abstract

In this investigation

the effects of rim seal diversion configurations on the aerodynamic and film cooling performances of turbine stage were analy-ed with axial rim seal as the research object.Firstly

hyperbola

ellipse and circle rim seal diversion configurations were designed based on the conventional axial rim seal configuration.Three-dimensional Reynolds-averaged Navier-Stokes(RANS)equations

coupled with a fully-developed shear stress transport(SST)turbulent model from Ansys-CFX

were utili-ed to evaluate the influence of rim seal diversion configurations on the interaction of the hub leakage flow with the mainstream in the turbine stage.The results show that all the three diversion configurations of hyperbola

ellipse and circle rim seals could improve the turbine efficiency compared with axial seal.The circle rim seal provides the best aerodynamic and film cooling performances of turbine stage.Compared with axial seal

the circle rim seal could improve the turbine efficiency

关键词

Keywords

references

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