Study on Leakage Characteristics of Labyrinth-Honeycomb Seals under Variable Parameters

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

doi:10.7652/xjtuxb202509020

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Study on Leakage Characteristics of Labyrinth-Honeycomb Seals under Variable Parameters

更新时间：2025-09-11

- Study on Leakage Characteristics of Labyrinth-Honeycomb Seals under Variable Parameters
- Journal of Xi’an Jiaotong University Vol. 59, Issue 9, Pages: 209-219(2025)
- 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， 710049，西安
  2.西安交通大学叶轮机械研究所， 710049，西安
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202509020
  CLC： TK263.2
- Received：17 March 2025，
  
  Online First：20 May 2025，
  
  Published：10 September 2025
- 稿件说明：
移动端阅览
WANG Ziqi, LI Wenhao, XU Lei, et al. Study on Leakage Characteristics of Labyrinth-Honeycomb Seals under Variable Parameters[J]. Journal of Xi’an Jiaotong University, 2025, 59(9): 209-219.
DOI：

WANG Ziqi, LI Wenhao, XU Lei, et al. Study on Leakage Characteristics of Labyrinth-Honeycomb Seals under Variable Parameters[J]. Journal of Xi’an Jiaotong University, 2025, 59(9): 209-219. DOI： 10.7652/xjtuxb202509020.

摘要

为全面分析变参数下篦齿-蜂窝密封的泄漏特性，搭建了燃气轮机篦齿-蜂窝密封泄漏流动特性实验台，并开展了对应的数值分析，研究了6种压比、4种间隙、6种蜂窝深度、4种蜂窝直径、4种齿高、3种篦齿倾角、2种齿宽、2种篦齿节距下的篦齿-蜂窝密封封严性能。结果表明：篦齿-蜂窝密封流量系数、泄漏量分别随压比、间隙的增加线性增大，其中密封压比每增加10%，流量系数增加3.47%，封严间隙每增大1倍，泄漏量增加57.94%；篦齿-蜂窝密封泄漏量随蜂窝深度增加先减小后增大，在蜂窝深度为3.5 mm时封严效果最优，泄漏量较最小蜂窝深度减少9.81%；随着蜂窝直径增大，泄漏量先减小后增大，并在蜂窝直径为1.6 mm时实现最佳封严效果，其泄漏量相较于最大蜂窝直径时降低8.11%；随着齿高、倾角增加，泄漏量单调降低；篦齿节距对封严效果影响较大，而齿宽影响最小。

Abstract

To comprehensively analyze the leakage characteristics of labyrinth-honeycomb seals under variable parameters

an experimental platform for investigating the leakage flow characteristics of gas turbine labyrinth-honeycomb seals and conducts corresponding numerical simulations is established. The sealing performance is investigated under six pressure ratios

four clearance gaps

six honeycomb depths

four honeycomb diameters

four tooth heights

three labyrinth tooth inclination angles

two tooth widths

and two tooth pitches. The results indicate that the flow coefficient and leakage rate of labyrinth-honeycomb seals increase linearly with the pressure ratio and clearance gap. Specifically

for every 10% increase in the sealing pressure ratio

the flow coefficient increases by 3.47%

while doubling the clearance gap leads to a 57.94% increase in leakage. The leakage rate initially decreases and then increases with increasing honeycomb depth

achieving the optimal sealing effect at a honeycomb depth of 3.5 mm

where leakage is reduced by 9.81% compared to the minimum depth. Similarly

leakage first decreases and then increases with increasing honeycomb diameter

reaching the best sealing performance at a diameter of 1.6 mm

with an 8.11% reduction in leakage compared to the maximum diameter. Leakage decreases monotonically with increasing tooth height and inclination angle. The tooth pitch has a significant impact on sealing performance

while tooth width has the least influence.

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references

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