Influence of the tip and axial clearances on the aerodynamic performance of a helium compressor
MING Liang1, YANG Xiaoyong1, ZHANG Youjie1, WANG Jie1, FU Lin2, LI Shan2, WANG Qi2
1. Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Collaborative Innovation Center of Advanced Nuclear Energy Technology, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China;
2. No. 703 Institute of China Shipbuilding Industry Corporation, Harbin 150078, China
Abstract:The helium compressor is one of the key components in the high temperature gas-cooled reactor coupled with a helium turbine. The aerodynamic performance of the helium compressor significantly influences the whole system efficiency. Therefore, the effects of the tip and axial clearances on the helium compressor need to be further studied and optimized. A computational fluid dynamics model that has been verified against experimental data of the helium compressor is used to investigate the influence of the tip and axial clearances. The results show that a reduced tip clearance reduces the flow losses and increases the compression ratio and compressor efficiency, especially for clearances of less than 0.3 mm (2% of the relative blade height). A larger axial clearance lowers the compressor efficiency with an acceptable axial displacement of ±1.0 mm. The results show the influences of the tip and axial clearances on the model, and provide guidance for the design and optimization of the actual helium compressor.
明亮, 杨小勇, 张佑杰, 王捷, 傅林, 李珊, 王琦. 叶顶间隙与轴向间隙对氦气压气机气动特性的影响[J]. 清华大学学报(自然科学版), 2017, 57(8): 832-837.
MING Liang, YANG Xiaoyong, ZHANG Youjie, WANG Jie, FU Lin, LI Shan, WANG Qi. Influence of the tip and axial clearances on the aerodynamic performance of a helium compressor. Journal of Tsinghua University(Science and Technology), 2017, 57(8): 832-837.
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