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清华大学学报(自然科学版)  2017, Vol. 57 Issue (8): 832-837    DOI: 10.16511/j.cnki.qhdxxb.2017.22.046
  核能与新能源工程 本期目录 | 过刊浏览 | 高级检索 |
叶顶间隙与轴向间隙对氦气压气机气动特性的影响
明亮1, 杨小勇1, 张佑杰1, 王捷1, 傅林2, 李珊2, 王琦2
1. 清华大学 核能与新能源技术研究院, 先进核能技术协同创新中心, 先进反应堆工程与安全教育部重点实验室, 北京 100084;
2. 中船重工第703研究所, 哈尔滨 150078
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
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摘要 氦气压气机是高温气冷实验堆氦气透平发电系统的关键部件,其气动性能直接影响系统发电效率。氦气压气机径向间隙和轴向间隙对其气动性能有重要影响。该文以氦气压气机模型级为研究对象,采用试验验证过的数值计算方法,研究了叶顶间隙与轴向间隙对压气机气动性能的影响和机理。分析结果表明:减小叶顶间隙会减小泄漏流、回流、二次流,能够提高压气机的压比和效率,当间隙小于0.3 mm(叶高的2%)时尤其明显;动叶的偏离设计点的轴向移动会降低压气机的效率,可允许的轴向间隙变化范围为±1.0 mm。该研究结果揭示了叶顶间隙与轴向间隙对模型级的影响,可为氦气压气机整机气动性能的研究与优化提供依据。
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明亮
杨小勇
张佑杰
王捷
傅林
李珊
王琦
关键词 高温气冷堆氦气压气机叶顶间隙轴向间隙气动性能    
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.
Key wordshigh temperature gas-cooled reactor    helium compressor    tip clearances    axial clearances    aerodynamic performance
收稿日期: 2017-01-28      出版日期: 2017-08-15
ZTFLH:  TL334  
通讯作者: 张佑杰,教授,E-mail:zhangyj@tsinghua.edu.cn     E-mail: zhangyj@tsinghua.edu.cn
引用本文:   
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.
链接本文:  
http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2017.22.046  或          http://jst.tsinghuajournals.com/CN/Y2017/V57/I8/832
  表1 氦气压气机模型级叶片基本几何参数
  表2 氦气压气机模型级的主要参数
  图1 数值计算网格示意图
  图2 不同网格数下动叶99%叶高Mach数与总压的计算结果对比
  图3 氦气压气机模型级数值计算与试验性能曲线对比
  图4 设计工况下叶顶间隙与压气机性能的关系
  图5 不同叶顶间隙对动叶吸力面流线的影响
  图6 不同叶顶间隙对动叶附近速度场的影响
  图7 叶顶间隙对动叶90%叶高处压力场的影响
  图8 移动动叶对压气机性能的影响
  图9 50%叶高处动叶位置对压力场的影响
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