蜂窝密封泄漏特性理论与实验

doi:10.7527/S1000-6893.2016.0214

材料工程与机械制造

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蜂窝密封泄漏特性理论与实验

孙丹¹, 王猛飞¹, 艾延廷¹, 肖忠会², 孟继纲², 李云²

1. 沈阳航空航天大学辽宁省航空推进系统先进测试技术重点实验室, 沈阳 110136;
2. 沈阳鼓风机集团股份有限公司, 沈阳 110142

收稿日期:2016-06-07 修回日期:2016-07-17 出版日期:2017-04-15 发布日期:2016-08-03
通讯作者: 孙丹 E-mail:phd_sundan@163.com
基金资助:
国家自然科学基金（11302133，51675351）；辽宁省自然科学基金（2015020113）

Theoretical and experimental study of leakage characteristics of honeycomb seal

SUN Dan¹, WANG Mengfei¹, AI Yanting¹, XIAO Zhonghui², MENG Jigang², LI Yun²

1. Liaoning Key Laboratory of Advanced Test Technology for Aerospace Propulsion System, Shenyang Aerospace University, Shenyang 110136, China;
2. Shenyang Blower Works Group Co., Ltd., Shenyang 110142, China

Received:2016-06-07 Revised:2016-07-17 Online:2017-04-15 Published:2016-08-03
Supported by:
National Natural Science Foundation of China (11302133, 51675351); Natural Foundation of Liaoning Province (2015020113)

摘要/Abstract

摘要：

蜂窝密封的泄漏特性直接影响航空发动机的工作效率。本文采用理论分析与实验研究相结合的方法系统研究蜂窝密封的泄漏特性。建立了蜂窝密封流场特性CFD求解模型，数值分析了转速、进出口压比、蜂窝孔对边距、蜂窝孔深、蜂窝壁厚等因素对密封泄漏量的影响，揭示了蜂窝密封的封严机理。设计搭建了蜂窝密封泄漏特性实验台，实验研究了进出口压比、转速等因素对蜂窝密封泄漏特性的影响。数值分析与实验测试相互验证，在此基础上，考虑蜂窝密封泄漏特性影响因素，结合传统经典迷宫密封泄漏量Egli公式，构造了蜂窝密封泄漏量计算公式。研究结果表明，蜂窝密封的孔深、对边距和壁厚是通过影响蜂窝孔中涡系的发展和蜂窝孔的密度来影响泄漏量的。涡系发展的越充分，蜂窝孔的密度越大，蜂窝密封的泄漏量就越小；转速对蜂窝密封泄漏量影响较小；蜂窝密封的泄漏量随进出口压比的增加而增大，两者近似呈线性关系；随着蜂窝孔深度增加，蜂窝密封泄漏量先逐渐减小后逐渐趋于平稳；随着蜂窝孔对边距增加，密封泄漏量先减小，后出现了小幅度的增加；随着蜂窝壁厚的增加，蜂窝密封泄漏量先近似线性增大后缓慢增大。本文研究为蜂窝密封结构设计提供理论依据。

关键词: 蜂窝密封, 泄漏特性, 流场特性, 实验研究, 公式构造

Abstract:

The leakage characteristics of the honeycomb seal directly influence the working efficiency of the aero-engine. The leakage characteristics of honeycomb seal are analyzed using theoretical and experimental methods. The CFD model for the flow characteristic of honeycomb seal is developed to analyze the influence of rotational speed, inlet/outlet pressure ratio, subtense distance, cell depth, and wall thickness on seal leakage and to reveal the densification mechanism of honeycomb seal. The seal leakage test rig is designed and built to analyze the influence of the inlet/outlet pressure ratio and the rotational speed on leakage of honeycomb seal. Numerical analysis and experimental tests are conducted to verify each other. Based on the Egli formula for leakage quantity of the traditional classic labyrinth seal, the calculation formula for the leakage quantity of honeycomb seal is constructed, considering the factors influencing the leakage characteristics of honeycomb seal. The results show that the cell depth, subtense distance and wall thickness can influence the development of the vortex system and the density of honeycomb holes, and thereby influence the leakage. The more fully the vortex system develops and the greater the density of honeycomb hole is, the less honeycomb seal leakage will be. The results show that the rotational speed has little influence on the honeycomb seal leakage. The leakage linearly increase with the increasing inlet/outlet pressure ratio. With the increase of the honeycomb cell depth, the honeycomb seal leakage is firstly reduced and is then stabilized. With the increase of the subtense distance, the honeycomb seal leakage decreases initially, and then increases in small particle size range. With the increase of the wall thickness, the honeycomb seal leakage increases linearly initially, and then slowly increases. The results of this study can assist in improving the design of annular seal.

Key words: honeycomb seal, leakage characteristics, fluid field characteristics, experimental study, construction of formula

中图分类号:

V232.9

孙丹, 王猛飞, 艾延廷, 肖忠会, 孟继纲, 李云. 蜂窝密封泄漏特性理论与实验[J]. 航空学报, 2017, 38(4): 420512-420512.

SUN Dan, WANG Mengfei, AI Yanting, XIAO Zhonghui, MENG Jigang, LI Yun. Theoretical and experimental study of leakage characteristics of honeycomb seal[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2017, 38(4): 420512-420512.

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E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

蜂窝密封泄漏特性理论与实验

Theoretical and experimental study of leakage characteristics of honeycomb seal

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