| 釜外和釜内螺旋半圆管夹套内流体流动与换热性特性 |
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| 引用本文： | 李雅侠,吴剑华,战洪仁,王翠华. 釜外和釜内螺旋半圆管夹套内流体流动与换热性特性[J]. 中国化学工程学报, 2011, 19(2): 253-261 |
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| 作者姓名： | 李雅侠 吴剑华 战洪仁 王翠华 |
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| 作者单位： | 1. School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, China;2. School of Mechanical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China |
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| 基金项目： | Supported by the National Key Technologies Research and Development Program during the 10th Five-year Plan Period(2004BA319B1); the Educational Commission of Liaoning Province of China(2008S117) |
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| 摘 要： | 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 equa-tions 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 four vortices when the Dean number increases,but that in the outer half coil jacket is not found.The critical Dean num-ber 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.
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| 关 键 词： | half coil jacket secondary flow temperature field heat transfer enhancement |
| 收稿时间： | 2010-08-25 |
| 修稿时间： | 2010-8-25 |
Fluid flow and heat transfer characteristic of outer and inner half coil jackets |
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| LI Yaxia,WU Jianhua,ZHAN Hongren,WANG Cuihua. Fluid flow and heat transfer characteristic of outer and inner half coil jackets[J]. Chinese Journal of Chemical Engineering, 2011, 19(2): 253-261 |
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| Authors: | LI Yaxia WU Jianhua ZHAN Hongren WANG Cuihua |
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| Affiliation: | 1. School of Chemical Engineering & Technology, Tianjin University, Tianjin 300072, China;2. School of Mechanical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China |
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| 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 four vortices 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. |
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| Keywords: | half coil jacket secondary flow temperature field heat transfer enhancement |
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