旋转状态下篦齿流动换热特性研究  

Investion of Flow Heat Transfer Characteristics in a Rotating Labyrinth Seal

作　　者：杨少昀 罗磊[1] 杜巍[1] 王松涛[1] ANG Shaoyun;LUO Lei;DU Wei;WANG Songtao(School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 100080,China)

机构地区：[1]哈尔滨工业大学能源科学与工程学院,哈尔滨150001

出　　处：《工程热物理学报》2025年第1期138-143,共6页Journal of Engineering Thermophysics

基　　金：黑龙江省优秀青年基金(No.YQ2021E023);国家自然科学基金青年基金(No.52106041)。

摘　　要：篦齿封严是一种结构简单有效的封严技术,广泛应用于航空发动机中。本文采用数值模拟的方法研究了旋转对直通型篦齿封严结构流动换热的影响。研究的参数为Ta/Re从0变化0.1。所有的结果都是在雷诺数为6000,10000和15000时获得的。结果表明,在研究的范围内,旋转速度的增加会降低篦齿通道内的涡流损失和节流损失,从而导致泄漏系数增大;随着转速的增加,顶部壁面的换热增强而齿腔内的换热减弱。The straight-through labyrinth seal is an effective and simple sealing technology which is widely used in gas turbines.In this paper,the effect of rotation on the flow heat transfer in a straight-through labyrinth sealing structure is investigated using numerical simulations.All results are obtained at Reynolds numbers of 6000,10000 and 15000.The results show that the increase in rotational speed reduces the vortex losses and throttling losses in the labyrinth seal channel,which leads to the increase in the discharge coefficient.With the increase of rotational speed,the heat transfer at the tip wall is enhanced while the heat transfer at the tooth cavity is weakened.

关 键 词：封严篦齿 旋转 放电系数 换热特性 

分 类 号：TK474.8[动力工程及工程热物理—动力机械及工程]