| 含内热源的梯形腔自然对流换热数值模拟 |
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| 引用本文： | 张敏,陶锴,晏刚.含内热源的梯形腔自然对流换热数值模拟[J].化工学报,2011,62(6):1543-1548. |
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| 作者姓名： | 张敏 陶锴 晏刚 |
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| 作者单位： | 西安交通大学能源与动力工程学院 |
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| 基金项目： | 长江学者和创新团队发展计划项目 |
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| 摘 要： | 引言
封闭腔体内的自然对流换热问题在实际工程中有着重要应用,因而受到越来越多的关注,工程实际中常用的腔体结构有方腔、圆形腔、三角形腔等.
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| 关 键 词： | 自然对流 梯形腔体 内热源 数值模拟 |
Numerical simulation of natural convection in trapezoidal enclosures with discrete heater |
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| ZHANG Min,TAO Kai,YAN Gang.Numerical simulation of natural convection in trapezoidal enclosures with discrete heater[J].Journal of Chemical Industry and Engineering(China),2011,62(6):1543-1548. |
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| Authors: | ZHANG Min TAO Kai YAN Gang |
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| Abstract: | A numerical study is carried out on natural convection in a two dimensional trapezoidal enclosure with a centered discrete heater.For a fixed area discrete heater, in the range of aspect ratio ε from 1 to 6, rotation angle θ from 0° to 90°, and Rayleigh number from 103 to 106, the changes of isotherms, streamlines and Nuave in the trapezoidal enclosure are studied.The simulation results show that heat transfer mechanism in the trapezoidal enclosure changes from conduction to convection as Ra increases, and Nuave increases simultaneously.The variations of ε and θ also have great effect on the heat transfer in the enclosure, and the increase of ε has a positive effect on the heat transfer.Nuave reaches the maximum or minimum value at different values of Ra and ε. |
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