Labyrinth seal leakage and dynamics characteristics analysis based on Black Model

作     者：马文生 陈照波 焦映厚 沈那伟 

作者机构：School of Mechatronics EngineeringHarbin Institute of Technology Rotor Dynamics LaboratoryVirginia TechBlacksburgVA 24061USA 

出 版 物：《Journal of Harbin Institute of Technology(New Series)》 (哈尔滨工业大学学报（英文版）)

年 卷 期：2012年第19卷第1期

页      面：58-62页

核心收录：

学科分类：0810[工学-信息与通信工程] 082502[工学-航空宇航推进理论与工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0825[工学-航空宇航科学与技术] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：Sponsored by the National Natural Science Foundation of China (Grant No.10872054 10872055 and 50903082) 

主　　题：labyrinth seal leakage black-child model dynamics characteristics 

摘      要：One of the important problems to be tackled in turbo machines is the leakage dynamics characteristics of labyrinth seals. In this paper we analyzed the effect of labyrinth seal structure and the change in fluid flow pressure on the leakage characteristics of seal. Computational fluid dynamics (CFD) model for 3D labyrinth seal was built which provides a basis for reducing steam flow excitation. The streamline pattern and the pressure drop characteristics for leakage of steam through a labyrinth seal was investigated. Simulations of internal flow and leakage characteristics had been performed by CFD software and Black-Child model. The results showed that the amount of leakage is directly proportional to the tooth gap and inlet pressure and inversely proportional to the cavity depth and outlet pressure. The proposed CFD model provides a feasible method to predict the leakage characteristics of labyrinth seal in response to the structure of seal and the change in inlet-outlet pressures.