陶瓷栅板密封泄漏特性数值方法研究  

Study on numerical method of leakage characteristics of ceramic wafer seal

作　　者：金冠男 孙丹 张国臣 刘胜[2] 满延进[2] 李建辉 JIN Guannan;SUN Dan;ZHANG Guochen;LIU Sheng;MAN Yanjin;LI Jianhui(Liaoning Key Laboratory of Advanced Measurement and Test Technology for Aviation Propulsion System,School of Aero-engine,Shenyang Aerospace University,Shenyang 110136,China;Beijing Power Machinery Institute,Beijing 100074,China)

机构地区：[1]沈阳航空航天大学航空发动机学院辽宁省航空推进系统先进测试技术重点实验室,沈阳110136 [2]北京动力机械研究所,北京100074

出　　处：《航空动力学报》2024年第11期266-276,共11页Journal of Aerospace Power

基　　金：国家自然科学基金(52075346);先进航空动力创新工作站(依托中国航空发动机研究院设立)项目(HKC2020-02-030)。

摘　　要：理论分析了陶瓷栅板密封的泄漏特性,提出了考虑间隙泄漏与接触泄漏的陶瓷栅板密封泄漏特性的数值计算方法,在验证数值方法准确性基础上,通过分析进出口压比及温度等工况参数对闭合力、流量因子及泄漏量的影响,研究了工况参数下的陶瓷栅板密封流场、自密封效应及泄漏特性,揭示了自密封效应的变化规律,阐明了陶瓷栅板密封的泄漏机理。研究表明:陶瓷栅板密封闭合力随进出口压比的增加而增大,自密封效应随之增强,径向闭合力高于切向闭合力;气流温度对陶瓷栅板密封切向闭合力影响较小,径向闭合力随着气流温度的增加而平缓减小,径向自密封效应随之减弱;陶瓷栅板密封泄漏量随着进出口压比增加而增大,随着温度的增大而减小,且间隙泄漏在泄漏系统中占主要地位。提出的数值方法能准确计算陶瓷栅板密封泄漏量,为陶瓷栅板密封泄漏特性分析提供理论依据。The leakage characteristics of ceramic wafer seal were analyzed theoretically,and a numerical calculation method of leakage characteristics of ceramic wafer seal considering clearance leakage and contact leakage was proposed.On the basis of verifying the accuracy of the numerical method,the flow field,the self-sealing effect and leakage characteristics of ceramic wafer seal under working conditions were studied by analyzing the influence of inlet and outlet pressure ratio and temperature on the closing force,flow factor and leakage,revealing the changing rule of self-sealing effect and clarifying the leakage mechanism of ceramic wafer seal.The results showed that the sealing force of ceramic wafer seal increased with the increase of inlet and outlet pressure ratio,and the self-sealing effect was enhanced.The radial closing force was higher than the tangential closing force.Air flow had little influence on the tangential closing force of ceramic wafer seal,while the radial closing force decreased gently with the increase of air flow temperature,and the radial self-sealing effect was weakened accordingly.The leakage of ceramic wafer seal increased with the increase of inlet-outlet pressure ratio and decreased with the temperature rise,and the gap leakage played a major role in the leakage system.The numerical method proposed can accurately calculate the leakage of ceramic wafer seals,providing a theoretical basis for the analysis of leakage characteristics of ceramic wafer seal.

关 键 词：陶瓷栅板密封 间隙泄漏 接触泄漏 泄漏特性 自密封效应 

分 类 号：V233.5[航空宇航科学与技术—航空宇航推进理论与工程]