Experimental and Numerical Study on Effects of Tooth Group Number and Clearance on Leakage Characteristics in Honeycomb Seals

XU Lei; LI Wenhao; WANG Ziqi; HE Kun; YAN Xin

doi:10.19805/j.cnki.jcspe.2026.250166

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Experimental and Numerical Study on Effects of Tooth Group Number and Clearance on Leakage Characteristics in Honeycomb Seals

更新时间：2026-06-11

- Experimental and Numerical Study on Effects of Tooth Group Number and Clearance on Leakage Characteristics in Honeycomb Seals
- Chinese Journal of Power Engineering Vol. 46, Issue 6, Pages: 18-27(2026)
- 作者机构：
  
  1. 西安交通大学热流科学与工程教育部重点实验室,陕西,西安,710049
  2. 西安交通大学叶轮机械研究所,陕西,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2026.250166
  CLC： TK263
- Published：2026
- 稿件说明：
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徐磊, 李文豪, 王梓齐, 何坤, 晏鑫. 齿组数和间隙对蜂窝密封泄漏特性影响的实验与数值研究[J]. 动力工程学报, 2026, 46(6): 18-27.
徐磊, 李文豪, 王梓齐, 何坤, 晏鑫. 齿组数和间隙对蜂窝密封泄漏特性影响的实验与数值研究[J]. 动力工程学报, 2026, 46(6): 18-27. DOI： 10.19805/j.cnki.jcspe.2026.250166.

DOI： 10.19805/j.cnki.jcspe.2026.250166

摘要

搭建了蜂窝密封泄漏性能实验台

测量了2种齿组数在不同间隙和压比下的泄漏量及密封腔室压力分布

并通过数值计算分析齿组数、间隙和压比对泄漏量和腔室压力的影响。结果表明:随着压比增大

不同齿组数、间隙的蜂窝密封泄漏量急剧上升

且低压比(1.1~1.3)时泄漏量变化率高于高压比(1.9~2.1);压比相同时

泄漏量随间隙的增大而增加;齿组数增加可分散各级压降

分担流动阻力

降低泄漏流动能与泄漏量;间隙减小

密封腔室气流静压降增大

封严效果增强

尤其在高压比(1.9~2.1)工况下

工质流经第3腔室后静压下降速率显著加快。

Abstract

A leakage performance test rig for honeycomb seals was built. The leakage flow rates and the pressure distributions in the sealing chambers were measured for two groups of tooth rows under different clearances and pressure ratios

and the influence of tooth group number

clearance and pressure ratio on leakage and chamber pressure was analyzed through numerical calculations. Results show that as the pressure ratio increases

the leakage flow rates of honeycomb seals with different numbers of tooth rows and clearances increase sharply

and the variation rate of the leakage flow rate at a low pressure ratio (1.1~1.3) is higher than that at a high pressure ratio (1.9~2.1). When the pressure ratio is the same

the leakage flow rate increases with clearance increase. Increasing the number of tooth group can disperse the pressure drop

share the flow resistance

and reduce the kinetic energy of leakage flow and the leakage flow rate. At the same time

as the clearance decreases

the static pressure drop of gas flow in sealing chamber increases

and the sealing effect is enhanced. Especially under high pressure ratio (1.9~2.1) condition

the static pressure drop rate of the working fluid significantly accelerates after flowing through the third chamber.

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Keywords

references

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