Swirl brakes optimization for rotordynamic performance improvement of labyrinth seals using computational fluid dynamics method

被引：20

作者：

Zhang, Wanfu ^{[1
]}

Wu, Kexin ^{[1
]}

Gu, Chengjing ^{[1
]}

Tian, Haoyang ^{[2
]}

Zhang, Xiaobin ^{[3
]}

Li, Chun ^{[1
]}

机构：

[1] Univ Shanghai Sci & Technol, Sch Energy & Power Engn, 516 Jungong Rd, Shanghai 200093, Peoples R China

[2] State Grid Shanghai Municipal Elect Power Co, Elect Power Res Inst, 171 Handan Rd, Shanghai 200437, Peoples R China

[3] North China Elect Power Res Inst Co Ltd, 1 Dizangan South Lane,Fuxingmenwai St, Beijing 100045, Peoples R China

来源：

TRIBOLOGY INTERNATIONAL | 2021年 / 159卷

基金：

中国国家自然科学基金; 上海市自然科学基金;

关键词：

Swirl brake; Labyrinth seal; Rotordynamic characteristics; Computational fluid dynamics; TURBINE INTERSTAGE SEAL;

D O I：

10.1016/j.triboint.2021.106990

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The various lengths, clearances, numbers, and rotation angles of swirl brakes are investigated to evaluate their effects on the static and rotordynamic performance of the labyrinth seal using Computational Fluid Dynamics. With increasing number, length and decreasing clearance, the efficiency of the straight swirl brake can be improved. The negative stagger angle could reverse the forward flow. The lean angle has relatively slight effects on the swirl brake. Increasing preswirl ratios tends to increase the circumferential velocity. Compared with the no-brake labyrinth seal, the labyrinth seal with swirl brakes shows lower cross-coupled stiffness and resultant larger effective damping. The effective damping with negative stagger angles is increased about 100%?200% compared to the straight swirl brakes.

引用

页数：12

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