Investigation on the tip clearance structure of a helium compressor rotor

被引：0
|
作者：
Tian Z. [1 ]
Zheng Q. [1 ]
Jiang B. [1 ]
Zhao W. [1 ]
Duan Y. [1 ]
机构：
[1] College of Power and Energy Engineering, Harbin Engineering University, Harbin
来源：
Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2019年 / 40卷 / 05期
关键词：
Adiabatic efficiency; Clearance structure; Helium compressor; High load design; Numerical simulation; Tip clearance leakage; Unilateral groove;
D O I：
10.11990/jheu.201803099
中图分类号：
学科分类号：
摘要：
The highly loaded design method of helium compressors can effectively solve the compression problem arising from the use of helium in high-temperature gas-cooled reactors. However, it also leads to more leakage problems at the tip clearance of a highly loaded helium compressor. In this paper, the numerical simulation is used to study the formation mechanism of the tip clearance leakage vortex of a helium compressor rotor, the control mechanism of the rotor upper end wall gap structure, and its control function on the tip clearance leakage vortex. Results showed that the unilateral groove on the leading edge of the rotor tip of the helium compressor has the most obvious control effect on the tip clearance leakage loss, and the performance improvement of the helium compressor rotor is the greatest when the groove measures 30°. In addition, the greater the clearance, the stronger the effectiveness of the unilateral groove. Finally, when the tip clearance is 1 mm, the adiabatic efficiency of the compressor rotor increased by 0.15%. The single side slot on the tip clearance of the helium compressor rotor can effectively control tip clearance leakage loss and improve compressor performance at design point. © 2019, Editorial Department of Journal of HEU. All right reserved.
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页码：938 / 943
页数：5
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