变参数篦齿-蜂窝密封泄漏特性的研究

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关键词：蜂窝密封；篦齿；泄漏量；实验；数值分析

中图分类号：TK263.2文献标志码：A

DOI：10.7652/xjtuxb202509020 文章编号： 0253-987X（2025）09-0209-11

Study on Leakage Characteristics of Labyrinth-Honeycomb Sealsunder Variable Parameters

WANG Ziqi 1，2 ，LI Wenhao 1，2 ，XU Lei 1，2 ，HE Kun¹，YAN Xin² （1. MOE Key Laboratoryof Thermo-Fluid Science and Engineering，Xi'an Jiaotong University，Xi'an 710049，China; 2.Institute of Turbomachinery，Xi'an JiaotongUniversity，Xi'an 7loo49，China）

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 3.5mm ，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 1.6mm ，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. Keywords： honeycomb seal; labyrinth; leakage; experiment; numerical simulation

随着透平机械向高压、高温、高转速方向发展，动静间隙泄漏流引起的气动损失对机组的运行性能产生重要影响。（剩余15159字）