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雷诺数和半径比对90°圆弧弯管流动特性的数值研究

李静 杨俊红 黄涛 韩奎 高琳

李静, 杨俊红, 黄涛, 韩奎, 高琳. 雷诺数和半径比对90°圆弧弯管流动特性的数值研究[J]. 机械科学与技术, 2017, 36(10): 1491-1497. doi: 10.13433/j.cnki.1003-8728.2017.1003
引用本文: 李静, 杨俊红, 黄涛, 韩奎, 高琳. 雷诺数和半径比对90°圆弧弯管流动特性的数值研究[J]. 机械科学与技术, 2017, 36(10): 1491-1497. doi: 10.13433/j.cnki.1003-8728.2017.1003
Li Jing, Yang Junhong, Huang Tao, Han Kui, Gao Lin. Numerically Studying Effects of Reynolds Number and Radius Ratio on Flow Characteristics of 90° Arc Bend Pipe[J]. Mechanical Science and Technology for Aerospace Engineering, 2017, 36(10): 1491-1497. doi: 10.13433/j.cnki.1003-8728.2017.1003
Citation: Li Jing, Yang Junhong, Huang Tao, Han Kui, Gao Lin. Numerically Studying Effects of Reynolds Number and Radius Ratio on Flow Characteristics of 90° Arc Bend Pipe[J]. Mechanical Science and Technology for Aerospace Engineering, 2017, 36(10): 1491-1497. doi: 10.13433/j.cnki.1003-8728.2017.1003

雷诺数和半径比对90°圆弧弯管流动特性的数值研究

doi: 10.13433/j.cnki.1003-8728.2017.1003
详细信息
    作者简介:

    李静(1991-),硕士研究生,研究方向为供热系统节能潜力分析及设计优化,1397219392@qq.com

    通讯作者:

    杨俊红(联系人),副教授,博士,yangjunhong@tju.edu.cn

Numerically Studying Effects of Reynolds Number and Radius Ratio on Flow Characteristics of 90° Arc Bend Pipe

  • 摘要: 运用FLUENT软件中的RNG k-ε模型对不同雷诺数Re和不同半径比Rc/D下90°圆弧弯管内的流体流动进行了数值模拟,分析了管内流体的速度场分布、压力场分布以及二次流现象,考察了不同雷诺数Re(1×104≤Re≤1×106)和不同半径比Rc/D(0.6≤Rc/D≤2)组合下72种工况的局部阻力系数以及局部阻力影响长度。结果表明:同一Re下,Rc/D越大,局部阻力系数ξ越小。Rc/D一定时,当Re≤6×105时,局部阻力系数ξ随Re的增大迅速减小;当Re≧6×105时,局部阻力系数ξ随Re的变化很小,几乎趋于不变值。同一Re下,Rc/D越大,局部阻力影响长度越短。局部阻力影响长度随Re的增大先减小后趋于定值,且Rc/D越小,局部阻力影响长度越延后趋于定值。
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出版历程
  • 收稿日期:  2016-08-15
  • 刊出日期:  2017-10-05

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