| 两种肋片的损失率分析及优化 |
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| 引用本文： | 陈维汉,钱壬章.两种肋片的损失率分析及优化[J].华中科技大学学报(自然科学版),1992(4). |
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| 作者姓名： | 陈维汉 钱壬章 |
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| 作者单位： | 华中理工大学动力工程系
(陈维汉)，华中理工大学动力工程系(钱壬章) |
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| 摘 要： | 本文以热力学第一及第二定津分析肋片流场的流动与换热特征,导出肋片传热过程的(火用)损失率方程;以其为目标函数、对针形肋片和矩形肋片进行具休的性能分析;求得相应的最佳肋片特征尺度与最佳的流体流速;发现了雷诺数越小,最佳流速及尺度也越小,相应的(火用)损失率也越小的一般规律.这为肋片的优化提供了定量的方法,也为肋片的微型化、流动的低速化提供了依据.
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| 关 键 词： | 肋片 烳损失率 性能优化 |
A Lost Exergy Analysis and Performance Optimization for a Fin in Forced Convection |
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| Chen Weihan Qian Renzhang.A Lost Exergy Analysis and Performance Optimization for a Fin in Forced Convection[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,1992(4). |
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| Authors: | Chen Weihan Qian Renzhang |
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| Institution: | Chen Weihan Qian Renzhang |
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| Abstract: | The fluid flow and heat transfer of a fin in forced convection are analyzed and the lost exergy equations showing the irreversibility of flow and heat transfer for the fin are derived on the basis of the first and second laws of thermodynamics. For instance, the equations have been used to carry out a performance analysis for the pin-shaped fin and the rectangular plate fin in forced convection. The optimal fin dimensions and fluid velocity have been obtained for minimum lost exergy. It has been found that the smaller the Reynolds number of the fin is, the smaller the optimal velocity and dimension and the smaller the lost exergy rate will be. |
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| Keywords: | fin lost exergy rate performance optimization |
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