| 纵向涡强化换热特性及机理分析 |
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| 引用本文： | 田丽亭,雷勇刚,何雅玲.纵向涡强化换热特性及机理分析[J].工程热物理学报,2008,29(12). |
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| 作者姓名： | 田丽亭 雷勇刚 何雅玲 |
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| 作者单位： | 西安交通大学动力工程多相流国家重点实验室,陕西,西安,710049 |
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| 基金项目： | 973国家重点基础研究发展计划项目，教育部科学技术研究重大项目 |
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| 摘 要： | 本文在尼Re=190～1125范围内对两种不同形状纵向涡发生器(矩形、三角形)以两种不同方式(渐缩式、渐扩式)布置于平行通道内的流动换热特性进行了三维数值模拟研究,并利用场协同原理对其换热机理进行了分析.结果表明:纵向涡使通道换热得到很大提高,通道平均Num数最大可提高46%.比较了通道性能评价指标(Num/Num0)/(f/f0),综合性能三角翼优于矩形翼,对于三角翼布置方式不同对综合性能影响不大,对于矩形翼渐扩方式布置优于渐缩方式.纵向涡使速度与温度梯度的平均夹角减小,通道中流场和温度场协同程度得到改善.
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| 关 键 词： | 纵向涡发生器 强化换热 场协同 |
HEAT TRANSFER ENHANCEMENT IN A CHANNEL WITH LONGITUDINAL VORTEX GENERATORS AND FIELD SYNERGY PRINCIPLE ANALYSIS |
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| TIAN Li-Ting,LEI Yong-Gang,HE Ya-Ling.HEAT TRANSFER ENHANCEMENT IN A CHANNEL WITH LONGITUDINAL VORTEX GENERATORS AND FIELD SYNERGY PRINCIPLE ANALYSIS[J].Journal of Engineering Thermophysics,2008,29(12). |
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| Authors: | TIAN Li-Ting LEI Yong-Gang HE Ya-Ling |
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| Institution: | TIAN Li-Ting LEI Yong-Gang HE Ya-Ling (State Key Laboratory of Multiphase Flow in Power Engineering,Xi\'an Jiaotong University,Xi\'an China) |
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| Abstract: | 3D numerical simulations are performed for laminar heat transfer and fluid flow char- acteristics of a flat-plate channel with longitudinal vortex generators.The effects of two different type longitudinal vortex generators(LVGs),rectangular winglet pairs(RWP)and delta winglet pairs (DWP),with two different configurations,common-flow-down and common-flow-up,are examined. The Reynolds number based on the height of the channel varies from 190 to 1125.The numerical results show that the applications of the LVGs... |
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| Keywords: | longitudinal vortex generator heat transfer enhancement field synergy principle |
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