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釜外和釜内螺旋半圆管夹套内流体流动与换热性特性
引用本文:李雅侠,吴剑华,战洪仁,WANG Cuihua.釜外和釜内螺旋半圆管夹套内流体流动与换热性特性[J].Canadian Metallurgical Quarterly,2011,19(2).
作者姓名:李雅侠  吴剑华  战洪仁  WANG Cuihua
摘    要:


Fluid Flow and Heat Transfer Characteristic of Outer and Inner Half Coil Jackets
LI Yaxia,WU Jianhua,ZHAN Hongren,WANG Cuihua.Fluid Flow and Heat Transfer Characteristic of Outer and Inner Half Coil Jackets[J].Canadian Metallurgical Quarterly,2011,19(2).
Authors:LI Yaxia  WU Jianhua  ZHAN Hongren  WANG Cuihua
Affiliation:1. School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, China School of Mechanical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
2. School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, China
3. School of Mechanical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
Abstract:The physical models of the outer and inner half coil jackets were simplified to two types of coiled ducts.The mathematic models of incompressible fluid at the condition of laminar flow and heat transfer in the two types of jackets for cooling process reactor were set up and solved by the semi-implicit method for pressure linked equations consistent (SIMPLEC) algorithm based on a control volume method. The flow and temperature fields were given and the effects of Dean and Prandtl numbers on flow and heat transfer were studied. The results show that flow in the inner half coil jacket is found to exhibit transition of secondary flow pattern from two vortices to fourvortices when the Dean number increases, but that in the outer half coil jacket is not found. The critical Dean number is about 96. The inner half coil jacket has stronger heat transfer ability than the outer half coil jacket and this superiority is more evident with larger Prandtl number. However, as the Dean number is greater than 105, the flow resistance enhances more severely in the inner jacket than the outer jacket. For both jackets, the centers of the heated wall are the poorest for heat transfer.
Keywords:half coil jacket  secondary flow  temperature field  heat transfer enhancement
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