水资源与水工程学报

文章摘要

YANG Wei,SUN Yue,YANG Guang,YANG Jiasi.椭圆管外流动熵产及放热系数的数值分析Journal of Water Resources and Water Engineering[J].,2011,22(6):

椭圆管外流动熵产及放热系数的数值分析

Numerical analysis of entropy generation and heat transfer coefficient of flow outside elliptical tube

DOI：10.11705/j.issn.1672-643X.2011.06.249

中文关键词: 椭圆管熵产放热系数数值分析对应关系

英文关键词: elliptical tube entropy generation heat transfer coefficient numerical analysis corresponding relation

基金项目:

Author Name	Affiliation
YANG Wei,SUN Yue,YANG Guang,YANG Jiasi	YANG Wei1,SUN Yue1,YANG Guang2,YANG Jiasi3(1.College of Architecture and Engineering,Liaoning Technical University,Fuxin 123000,China,2.Students Affairs Division,Fuxin Coal Works' Medical School,Fuxin 12300,3.College of Marxism,Changchun University of Science and Technology,Changchun 130022,China)

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中文摘要:

以椭圆管加热水流动为研究对象,对椭圆管加热水流动系统进行了二维数值模拟。通过联立求解流体力学基本方程和熵产方程,获得了熵产、放热系数与雷诺数和纵、横向间距的变化关系。数值分析结果表明:熵产主要发生在管壁表面附近,而在系统内部区域熵产较小,可以忽略;熵产随雷诺数的增大而增大,随纵、横向间距增加而减小,熵产与雷诺数、纵、横向间距存在对应关系,纵、横向间距宜在1.75～2.0间;在相同的雷诺数值时,熵产、放热系数沿流动方向呈现单调减小的趋势;不同的雷诺数值,熵产、放热系数不同,单调减小的趋势相同。放热系数随Re的增大而增大,且与雷诺数存在对应关系。纵向总放热系数随纵、横向间距增大而减小,且存在对应关系。

英文摘要:

This paper used water flow heated in elliptical tube as research object and made two-dimensional numerical simulation of water flow heated elliptical tube system.Through the simultaneous solution of fluid mechanics basic equation and entropy production equation,it got the variation relation between the entropy production,heat transfer coefficient and Re and vertical and horizontal distance.The results of numerical analysis shown that entropy production mainly appears near the surface of the wall and entropy...

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