Experimental and Numerical Investigations of the Leakage Characteristics of Two-Stage Brush Seal

doi:10.7652/xjtuxb201307002

您当前的位置：

首页 >

文章列表页 >

Experimental and Numerical Investigations of the Leakage Characteristics of Two-Stage Brush Seal

更新时间：2025-07-09

- Experimental and Numerical Investigations of the Leakage Characteristics of Two-Stage Brush Seal
- Vol. 47, Issue 7, Pages: 7-12(2013)
- 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/xjtuxb201307002
  CLC： TK474.7
- Online First：10 July 2013，
  
  Published：2013
- 稿件说明：
移动端阅览
Experimental and Numerical Investigations of the Leakage Characteristics of Two-Stage Brush Seal[J]. 2013, 47(7): 7-12.
DOI：

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

CHUPP R E, HENDRICKS R C, LATTIME S B, et al. Sealing in turbomachinery [J]. Journal of Propulsion and Power, 2006, 22(2): 313-349.

LI Jun, QIU Bo, FENG Zhenping. Experimental and numerical investigations on the leakage flow characteristics of the labyrinth brush seal [J]. ASME Journal of Engineering for Gas Turbines and Power, 2012, 134(10): 102509.

BAYLEY F J, LONG C A. A combined experimental and theoretical study of flow and pressure distributions in a brush seal [J]. ASME Journal of Engineering for Gas Turbines and Power, 1993, 115(2): 404-410.

CHEW J W, HOGG S I. Porosity modeling of brush seals [J]. ASME Journal of Tribol, 1997, 119: 769-775.

黄学民, 史伟, 王洪铭. 刷式密封中泄漏流动的多孔介质数值模型 [J]. 航空动力学报, 2000, 15(1): 56-58.

HUANG Xuemin, SHI Wei, WANG Hongmin. Porous medium leakage flow model of brush seal [J]. Journal of Aerospace Power, 2000, 15(1): 56-58.

曹广州, 吉洪湖, 纪国剑. 刷式封严初期使用特性的实验和数值研究 [J]. 推进技术, 2010, 31(4): 478-482, 489.

CAO Guangzhou, JI Honghu, JI Guojian. Experimental and numerical study on the leakage characteristics of brush seals at the early stage of operating [J]. Journal of Propulsion Technology, 2010, 31(4): 478-482, 489.

李军, 晏鑫, 丰镇平, 等. 基于多孔介质模型的刷式密封泄漏流动特性研究 [J]. 西安交通大学学报, 2007, 41(7): 768-771.

LI Jun, YAN Xin, FENG Zhenping, et al. Study on the leakage flow characteristics of brush seal based on porous medium model [J]. Journal of Xi'an Jiaotong University, 2007, 41(7): 768-771.

邱波, 李军. 刷式密封传热特性研究 [J]. 西安交通大学学报, 2011, 45(9): 94-100.

QIU Bo, LI Jun. Investigation on the heat transfer characteristics of brush seal [J]. Journal of Xi'an Jiaotong University, 2011, 45(9): 94-100.

ERGUN S. Fluid flow through packed columns [J]. Chem Eng Prog, 1952, 48: 89-94.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Investigation on the Leakage and Static Dynamic Characteristics of Rotating Seals at High Eccentricity Ratios

Review of the Leakage Flow and Rotordynamic Characteristics of the Annular Dynamic Seals in Liquid and Multiple Phases Conditions

Study of the Mechanism of Electrostatic Accumulation and Current Density Distribution Characteristics During Liquid Hydrogen Pipeline Transportation

Numerical Simulation of Space Charge Distribution Characteristics of Polyimide Materials under X-Ray Irradiation

Numerical Simulation Study on Geothermal Extraction Characteristics of Supercritical CO2 in Heterogeneous Fractures

Related Author

李志刚 1

陈尧兴 1

李军 1

李志刚

方志

李军

SUN Wenhao

Related Institution

School of Energy and Power Engineering, Xi'an Jiaotong University

Institute of Turbomachinery, Xi’an Jiaotong University

School of Energy and Power Engineering，Xi’an Jiaotong University

Aerospace System Engineering Shanghai

School of Electrical Engineering，Xi’an Jiaotong University

⁰