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VACUUM ›› 2021, Vol. 58 ›› Issue (4): 49-53.doi: 10.13385/j.cnki.vacuum.2021.04.09

• Vacuum Acquisition System • Previous Articles     Next Articles

Pneumatic Design of Centrifugal Vacuum Pump for Large Wind Tunnel

QI Da-wei1, LI Wei-hua2, LI Chuan-xu2, WU Bin1, CHEN De-jiang1, TANG Zhi-gong1   

  1. 1. Hypersonic Aerodynamics Institute of China Aerodynamics Research and Development Center,Mianyang 621000, China;
    2. Chengdu Huaxi Chemical Technology Co., Ltd, Chengdu 610000, China
  • Received:2021-01-20 Online:2021-07-25 Published:2021-08-05

Abstract: Someone large wind tunnel test with high gas temperature and large flow requires for better vacuum exhaust equipment, and the traditional wind tunnel exhaust equipment cannot meet the requirements. To achieve the purpose of reducing the scale and cost, the first large displacement, high speed centrifugal vacuum pump was applied to the wind tunnel test equipment. In this paper, the pneumatic structure of centrifugal vacuum pump is designed according to the exhaust requirement of wind tunnel test. Using three-dimensional numerical simulation software to simulate the internal flow of centrifugal pump, in order to give full consideration to the asymmetry of the internal flow of centrifugal pump, the flow characteristics of rotor of the centrifugal pump the whole channel simulation analysis. The results show that the design of centrifugal pump flow, the ultimate vacuum and other indexes meet the design requirements, which is verified in actual work and better complete the wind tunnel test for vacuum exhaust security work.

Key words: wind tunnel, exhaust equipment, centrifugal vacuum pump, pneumatic structure, internal flow

CLC Number: 

  • TB752+.24
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