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research-article

Experimental and Numerical investigation of closed Radial-Inflow Turbine with Labyrinth Seals

[+] Author and Article Information
Wen Li

Institute of Engineering Thermophysics, Chinese Academy of Sciences 11 Beisihuanxi Road, Beijing 100190, P. R. ChinaUniversity of Chinese Academy of Sciences No.19(A) Yuquan Road, Shijingshan District, Beijing 100049, P. R. China
liwen@iet.cn

Xing Wang

Institute of Engineering Thermophysics, Chinese Academy of Sciences 11 Beisihuanxi Road, Beijing 100190, P. R. ChinaUniversity of Chinese Academy of Sciences No.19(A) Yuquan Road, Shijingshan District, Beijing 100049, P. R. China
wangxing@iet.cn

Xuehui Zhang

Institute of Engineering Thermophysics, Chinese Academy of Sciences 11 Beisihuanxi Road, Beijing 100190, P. R. ChinaUniversity of Chinese Academy of Sciences No.19(A) Yuquan Road, Shijingshan District, Beijing 100049, P. R. China
Zhangxuehui@iet.cn

Xinjing Zhang

Institute of Engineering Thermophysics, Chinese Academy of Sciences 11 Beisihuanxi Road, Beijing 100190, P. R. ChinaUniversity of Chinese Academy of Sciences No.19(A) Yuquan Road, Shijingshan District, Beijing 100049, P. R. China
zhangxinjing@iet.cn

Yangli Zhu

Institute of Engineering Thermophysics, Chinese Academy of Sciences 11 Beisihuanxi Road, Beijing 100190, P. R. ChinaUniversity of Chinese Academy of Sciences No.19(A) Yuquan Road, Shijingshan District, Beijing 100049, P. R. China
zhuyangli@iet.cn

Haisheng Chen

Institute of Engineering Thermophysics, Chinese Academy of Sciences 11 Beisihuanxi Road, Beijing 100190, P. R. ChinaUniversity of Chinese Academy of Sciences No.19(A) Yuquan Road, Shijingshan District, Beijing 100049, P. R. China
chen_hs@mail.etp.ac.cn

1Corresponding author.

ASME doi:10.1115/1.4039804 History: Received August 01, 2017; Revised February 24, 2018

Abstract

It is a common practice to use closed impeller in radial inflow turbine against the flow leakage from tip clearance of impellers, especially in small volume flow condition. At the same time, it is necessary to seal by means of labyrinths against the higher pressure leakage between the shroud and the case. Experimental and computational investigation of shroud clearance flow in a radial inflow turbine with labyrinth seals are presented in this paper. Compared with the result without leakage, numerical computation result including the leakage of labyrinth seals agreed better with that of the experiment result, which indicates that the leakage of labyrinth seals can not be neglected. The present paper discusses the numerical and experimental results of several geometrical arrangements with a series of different clearance of labyrinth seals which follow as: dimensionless shroud clearance of 0?0.6%?1.2%?1.8%?2.7%?3.6% . At last, the character of flow and loss is analyzed by CFD tools.

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