Journal of Northeastern University Natural Science ›› 2020, Vol. 41 ›› Issue (3): 399-402.DOI: 10.12068/j.issn.1005-3026.2020.03.017

• Mechanical Engineering • Previous Articles     Next Articles

CFD-Based Evaluation of Back Pressure Resistance of Steam Ejectors

WANG Xiao-dong, SUN Hao, NING Jiu-xin, SUN Hao-lin   

  1. School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, China.
  • Received:2019-11-04 Revised:2019-11-04 Online:2020-03-15 Published:2020-04-10
  • Contact: WANG Xiao-dong
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Abstract: The back pressure resistance of the steam ejector was evaluated by the kinetic energy e of the unit volume of the steam ejector’s throat outlet section. The influence of geometric parameters of the ejector including throat diameter d, mixing chamber angle θ and nozzle exit position s on the steam ejector’s back pressure resistance and the relationship between e and the steam ejetor’s back pressure resistance were studied by using the computational fluid dynamics(CFD) method. The results showed that as d or θ decreases, or s increases, e and the back pressure resistance of steam ejector increase. When d, θ and s change, e can be used as a standard for evaluating the capability to resist the back pressure of steam ejectors.

Key words: steam ejector, back pressure resistance, entrainment ratio, geometric parameter, CFD(computational fluid dynamics)

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