Frontiers in Energy >

2009 , Vol. 3 >Issue 2: 167 - 174

DOI: https://doi.org/10.1007/s11708-009-0001-5

RESEARCH ARTICLE

Experimental and CFD analysis of nozzle position of subsonic ejector

  • Xilai ZHANG , 1 ,
  • Shiping JIN , 1 ,
  • Suyi HUANG 1 ,
  • Guoqing TIAN 2
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  • 1. Institute of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
  • 2. WISDRI Engineering & Research Incorporation Limited, Wuhan 430223, China

Received date: 05 May 2008

Accepted date: 25 Aug 2008

Published date: 05 Jun 2009

Copyright

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg
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Abstract

The influence of nozzle position on the performance of an ejector was analyzed qualitatively with free jet flow model. Experimental investigations and computational fluid dynamics (CFD) analysis of the nozzle position of the subsonic ejector were also conducted. The results show that there is an optimum nozzle position for the ejector. The ejecting coefficient reaches its maximum when the nozzle is positioned at the optimum and decreases when deviating. Moreover, the nozzle position of an ejector is not a fixed value, but is influenced greatly by the flow parameters. Considering the complexity of the ejector, CFD is reckoned as a useful tool in the design of ejectors.

Key words： ejector; nozzle position; ejecting coefficient; CFD

Cite this article

Xilai ZHANG , Shiping JIN , Suyi HUANG , Guoqing TIAN . Experimental and CFD analysis of nozzle position of subsonic ejector[J]. Frontiers in Energy, 2009 , 3(2) : 167 -174 . DOI: 10.1007/s11708-009-0001-5

Acknowledgements

This work was supported by the National Basic Research Program of China (No. 2007CB206901) and WISDRI Engineering & Research Incorporation Limited.
Notation
p—gauge pressure/kPa
Q—volume flow rate/m3·s-1
D—diameter/mm
R—radius/mm
n—ejecting coefficient
L—length/mm
α—turbulence number
θ—jet spread angle
Subscripts:
p—primary flow
s—secondary flow
m—mixture flow
pn—primary nozzle
jn—jet nozzle
js—jet cross section
mc—mixing chamber
im—inlet of mixing chamber
om—outlet of mixing chamber

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