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过程工程学报 ›› 2017, Vol. 17 ›› Issue (3): 461-468.DOI: 10.12034/j.issn.1009-606X.216279

• 流动与传递 • 上一篇    下一篇

基于CFD数值模拟的换热器外导流筒优化设计

王庆锋， 郝 帅*， 李 凯， 李 中   

  1. 北京化工大学机电工程学院，北京 100029
  • 收稿日期:2016-09-19 修回日期:2016-11-21 出版日期:2017-06-20 发布日期:2017-06-14
  • 通讯作者: 郝帅 15116945947@163.com

Optimum Design of External Flow Distributor Structure in Heat Exchanger Based on CFD Numerical Simulation#br#

Qingfeng WANG,  Shuai HAO*,  Kai LI,  Zhong LI   

  1. College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2016-09-19 Revised:2016-11-21 Online:2017-06-20 Published:2017-06-14

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摘要： 基于计算流体力学方法，模拟了换热器外导流筒结构参数入口倾角q、内筒高端间隙L和导流筒高度H对壳程纵截面和入口截面流场流动均匀性的影响. 结果表明，改变影响流通面积的结构参数q, L, H，能改善介质进入壳程后流场分布的均匀性，优化参数为q=9°~15°，L=105~110 mm，H=204~212 mm.基于计算流体力学方法，模拟了换热器外导流筒结构参数入口倾角q、内筒高端间隙L和导流筒高度H对壳程纵截面和入口截面流场流动均匀性的影响. 结果表明，改变影响流通面积的结构参数q, L, H，能改善介质进入壳程后流场分布的均匀性，优化参数为q=9°~15°，L=105~110 mm，H=204~212 mm.

关键词: 外导流筒, 计算流体力学, 数值模拟, 流动均匀性, 优化设计

Abstract: The changes of three key structure parameters entrance angle (θ), clearance of inner high end (L),distributor height (H) on the average velocity and the flow uniformity of the shellside vertical section and the entrance section after the steam enters the shellside were studied by means of computational fluid dynamics method. The results showed that flow uniformity after medium enters the shellside was actually improved by changing the structure parameters θ, L, H, which influence flow area. Considering the flow uniformity of the shellside vertical section and the entrance section, the optimized parameters which make the shellside flow uniformity are θ=9°~21°, L=100~120 mm, H=204~216 mm.The changes of three key structure parameters entrance angle (θ), clearance of inner high end (L), distributor height (H) on the average velocity and the flow uniformity of the shellside vertical section and the entrance section after the steam enters the shellside were studied by means of computational fluid dynamics method. The results showed that flow uniformity after medium enters the shellside was actually improved by changing the structure parameters θ, L, H, which influence flow area. Considering the flow uniformity of the shellside vertical section and the entrance section, the optimized parameters which make the shellside flow uniformity are θ=9°~21°, L=100~120 mm, H=204~216 mm.

Key words: external flow distributor, computational fluid dynamics, numerical simulation, flow uniformity, optimum design