航空发动机

侯鑫正1，3 ，张兴源 2 ，田金虎 3 ，张文亮 2 ，闵浩3 ，艾延廷 2.篦齿封严结构对高空台动静架连接密封特性影响的数值仿真[J].航空发动机,2024,50(5):133-138

篦齿封严结构对高空台动静架连接密封特性影响的数值仿真

Numerical Simulation of the Influence of Labyrinth Seal Structure on Sealing Characteristics of The SlipJoint Between the Moving and Fixed Element of Altitude Test Facility

DOI：

中文关键词: 高空模拟试车台篦齿封严结构参数泄漏量封严特性航空发动机

英文关键词:simulation altitude test facility labyrinth seal structural parameters leakage rate sealing characteristics aeroengine

基金项目:国家自然科学基金（11702177）、辽宁省自然科学基金（2020-BS-174）、辽宁省教育厅项目（JYT2020019）资助

作者	单位
侯鑫正1，3 ，张兴源 2 ，田金虎 3 ，张文亮 2 ，闵浩3 ，艾延廷 2	1. 南京航空航天大学能源与动力学院，南京 210016；2. 辽宁省航空推进系统先进测试技术重点实验室，沈阳 110136； 3. 高空模拟技术国防重点实验室，四川绵阳 621000

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中文摘要:

航空发动机高空模拟试车台动静架连接采用传统的篦齿密封结构，在试验中存在气体泄漏量大及流量管结冰现象。为了提高高空模拟试验的准确性与安全性，针对新型篦齿密封结构，基于理论分析与数值仿真方法开展了动静架连接处篦齿封严机理研究，获得了密封间隙、齿腔深宽比以及篦齿齿数等结构参数对新型篦齿密封结构封严特性的影响规律。结果表明：随着篦齿密封间隙减小，改变控制口压比，泄漏量变化趋势较缓慢；齿腔深宽比基本不影响主流入口泄漏量的变化趋势；随着篦齿齿数的增加，泄漏量减小。为高空台动静架篦齿密封结构设计和泄漏量分析提供了理论依据。

英文摘要:

A traditional labyrinth seal structure was adopted for the slip Joint between the moving and fixed element of an aeroengine altitude test facility, where significant gas leakage and flow metering device icing were found during tests. To improve the accuracy and safety of the altitude simulation tests, theoretical analyses and numerical simulations were carried out to study the sealing mechanism of the new labyrinth seal structure of the slip Joint, the influential laws of the structural parameters such as seal clearance, chamber depth-width ratio, and the number of fins on the sealing characteristics of the new labyrinth seal structure were obtained. The results show that with the decrease of labyrinth seal clearance, changing of the control port pressure ratio results in a slower change of the leakage rate; the chamber depth-width ratio barely affects the change trend of the leakage rate at the mainstream inlet; with the increase of the number fins, the leak? age rate decreases. It provides a theoretical basis for the structural design and leakage rate analysis for the labyrinth seal structure of the slip Joint of altitude test facilities.

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