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The Influence of Internal Structure on the Performance of Ejector

[+] Author Affiliations
Taide Tan

Guangxi University, Nanning, Guangxi, ChinaHunan University, Changsha, Hunan, China

Han Chen, Jiyun Liu, Wei Lu

Guangxi University, Nanning, Guangxi, China

Paper No. IMECE2014-36148, pp. V007T09A014; 8 pages
doi:10.1115/IMECE2014-36148
From:
  • ASME 2014 International Mechanical Engineering Congress and Exposition
  • Volume 7: Fluids Engineering Systems and Technologies
  • Montreal, Quebec, Canada, November 14–20, 2014
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4954-5
  • Copyright © 2014 by ASME

abstract

As a thermal fluid device, ejector is widely used in industries. For example, it has been employed as a compressor in an ejector refrigeration/cooling system or as a heat pump to increase pressure. However, the systematic studies in the internal complex structure of ejector have not been done or are far from finished. This paper uses theoretical calculation program to calculate the entrainment ratio and put forward the selection principle of two kinds of ejector in the condition of different compression ratio and expansion ratio. Then a commercial software based on the finite volume method is used to simulate the internal flow of ejector. The design details of the internal structure have been studied and analyzed, such as the mixing chamber section area ratio, nozzle distance, angle of mixing chamber contraction, angle of diffuser diffusion, and so on. Finally this paper proposed new thoughts to combine the cylindrical mixing chamber structure model and conical mixing chamber structure model.

Copyright © 2014 by ASME
Topics: Ejectors

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