两级刷式密封泄漏特性的实验与数值研究

邱波 1; 李军 1; 冯增国 2; 江生科 2; 孔祥林 2

doi:10.7652/xjtuxb201307002

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两级刷式密封泄漏特性的实验与数值研究

更新时间：2025-07-09

- 两级刷式密封泄漏特性的实验与数值研究
- Experimental and Numerical Investigations of the Leakage Characteristics of Two-Stage Brush Seal
- 西安交通大学学报 2013年47卷第7期页码：7-12
- 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：
  
  : 2012-11-20。作者简介: 邱波(1987—),男,博士生;李军(通信作者),男,教授,博士生导师。基金项目: 国家自然科学基金资助项目(50976083);中央高校基本科研业务费专项资金资助项目
- DOI：10.7652/xjtuxb201307002
  中图分类号： TK474.7
- 网络首发：2013-07-10，
  
  纸质出版：2013
- 稿件说明：
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邱波 1, 李军 1, 冯增国 2, 等. 两级刷式密封泄漏特性的实验与数值研究[J]. 西安交通大学学报, 2013,47(7):7-12.

Experimental and Numerical Investigations of the Leakage Characteristics of Two-Stage Brush Seal[J]. 2013, 47(7): 7-12.
邱波 1, 李军 1, 冯增国 2, 等. 两级刷式密封泄漏特性的实验与数值研究[J]. 西安交通大学学报, 2013,47(7):7-12. DOI： 10.7652/xjtuxb201307002.

Experimental and Numerical Investigations of the Leakage Characteristics of Two-Stage Brush Seal[J]. 2013, 47(7): 7-12. DOI： 10.7652/xjtuxb201307002.

摘要

基于刷式密封的泄漏量实验测试平台和Non-Darcian多孔介质方法的泄漏流动数值模型

详细研究了密封间隙、压比和转速对两级刷式密封泄漏流动特性的影响规律

分析了两级刷式密封的泄漏流动形态以及刷丝束表面的压力分布规律。结果表明:在相同的间隙和转速下

两级刷式密封的泄漏量随着压比的增加而增大; 在相同的转速和压比下

两级刷式密封的泄漏量随着间隙的增加而增大; 在相同的压比和间隙下

两级刷式密封的泄漏量随着转速的增加而减小。转子高速旋转时产生的离心伸长效应使密封间隙减小

因此数值计算时考虑转子的离心伸长效应对密封间隙的影响可以更加准确地预测两级刷式密封的泄漏量。

Abstract

The effects of the sealing clearance

pressure ratio and rotational speed on the leakage flow characteristics of the two-stage brush seal were investigated in detail using the leakage test rig and numerical leakage flow model based on non-Darcian porous medium of brush seal. The leakage flow fields and pressure distributions of two-stage brush seal were also analyzed. The results show that the leakage rate of the two-stage brush seal increases with respect to pressure ratio at the same sealing clearance and rotational speed. The leakage rate also increases with respect to sealing clearance at the same rotational speed and pressure ratio

and decreases with respect to the rotational speed at the same sealing clearance and pressure ratio. In addition

the sealing clearance is reduced by rotor centrifugal growth during high speed rotation. Therefore

the predictions of brush seal leakage are more accurate with consideration of the sealing clearance reduction caused by the rotor centrifugal growth during calculations.

关键词

Keywords

references

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