Numerical investigation of temperature field in brush seals

LI Li-ke; WANG Zhi-li; SONG Fei; WANG Wei; CHEN Cong-hui

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Numerical investigation of temperature field in brush seals

更新时间：2026-07-07

- Numerical investigation of temperature field in brush seals
- Vol. 25, Issue 5, (2010)
- 作者机构：
  
  1. 北京航空航天大学机械工程及自动化学院,北京,100191
  2. 中国航空工业集团公司沈阳发动机设计研究所,沈阳,110015
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2010
- 稿件说明：
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LI Li-ke, WANG Zhi-li, SONG Fei, et al. Numerical investigation of temperature field in brush seals[J]. 2010, 25(5).
DOI：

LI Li-ke, WANG Zhi-li, SONG Fei, et al. Numerical investigation of temperature field in brush seals[J]. 2010, 25(5). DOI：

摘要

分析了刷式密封中摩擦生热和热传递的机理

在此基础上将刷丝区域视为各向异性多孔介质、用阻抗力表示刷丝对流体的阻碍作用、以摩擦热为热源建立了计算流体动力学(CFD)模型;得到了刷式密封区域的压力、速度以及温度场分布;并得出了密封区域最高温度和安装过盈量、密封压差的对应关系.结果表明刷丝与转子接触面上存在显著温升

温度场在径向呈阶梯状分布且温度值沿转子外法线方向衰减;密封区域流体对流和出口泄漏流对于温度分布影响较大.计算结果能为刷式密封结构设计、接触副材料选择和密封环安装方式提供参考和指导.

Abstract

The mechanism of frictional heat generation and heat transfer in brush seals was analyzed and a computational fluid dynamics (CFD) model was developed. In the model

the brush was treated as an anisotropic porous region with nonlinear resistance coefficients and the frictional heat as a heat source. The pressure distribution

velocity field and temperature field were obtained and the maximum temperature under various interference and pressure difference conditions were studied. The investigation shows a steep temperature rise in bristle-rotor interface

which diminishes further away in the radial direction; fluid convection and leakage flow affect temperature distribution deeply. The results can be used to guide brush seal geometry design

contact-pair material selection and interference fit.

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