东北大学学报:自然科学版 ›› 2020, Vol. 41 ›› Issue (3): 399-402.DOI: 10.12068/j.issn.1005-3026.2020.03.017

• 机械工程 • 上一篇    下一篇

基于CFD评估蒸汽喷射泵的抗背压能力

王晓冬, 孙浩, 宁久鑫, 孙浩林   

  1. (东北大学 机械工程与自动化学院, 辽宁 沈阳110819)
  • 收稿日期:2019-11-04 修回日期:2019-11-04 出版日期:2020-03-15 发布日期:2020-04-10
  • 通讯作者: 王晓冬
  • 作者简介:王晓冬(1963-),男,辽宁铁岭人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51775098).

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
  • About author:-
  • Supported by:
    -

摘要: 通过蒸汽喷射泵喉部出口截面单位体积流体的动能e评估蒸汽喷射泵的抗背压能力.利用计算流体力学(computational fluid dynamics,CFD)方法研究喷射泵几何参数——喉部直径d、混合室角度θ和喷嘴出口位置s对蒸汽喷射泵抗背压能力的影响,以及e与蒸汽喷射泵抗背压能力之间的关系.结果表明:随着d或θ的减小,或s的增大,都会导致e增大,此时蒸汽喷射泵抗背压能力增强;当d,θ及s变化时,e可作为评估蒸汽喷射泵抗背压能力的指标.

关键词: 蒸汽喷射泵, 抗背压能力, 引射系数, 几何参数, CFD

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)

中图分类号: