高负荷氦气压气机的气体流动特点与改型设计

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Flow Characteristics and Redesign of Highly Loaded Helium Compressors

1. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China;
2. Harbin Marine Boiler & Turbine Research Institute, Harbin, 150036, China

摘要: 从氦气工质的特点入手,分析了氦气压气机设计参数选取区别于以空气为工质的压气机的特殊之处,重点分析了提高氦气压气机负荷的参数选择特点。由于氦气热物性与空气差别较大,气流经过压气机时的马赫数通常较低,造成单级压比较低,所以,氦气压气机的通流尺寸通常变化较小。为了提高单级负荷,减少压气机级数,需提高各级反动度。本文以多级氦气压气机为例,通过数值模拟分析了该压气机的三维流动特点,并进行了改型设计。
- 高负荷压气机 /
- 高反动度 /
- 氦气压气机
Abstract: Starting with the peculiarity of helium,the differences in choosing the design parameters be-tween helium compressors and air compressors are analyzed,and the characteristics in parameter selection to increase helium compressors loading are emphasized.Because the physical characteristics of helium are quite different from that of air,the flow in helium compressors is presented as low Mach number resulting in low stage pressure ratio,so generally the variation of passage size is less in helium compressors.In order to im-prove the stage loading and decrease the stage number,it is necessary for each stage to increase reactor.A numerical study is performed for a multistage Helium compressor to analyze the flow characteristics and the redesign is carried out in this paper.
- Highly Loaded Compressors /
- High reactor /
- Helium Compressors