Convective heat transfer and flow resistance characteristics of various types of elliptical tubes

被引：2

作者：

Tong Zheng-ming ^{[1
]}

Hu Yong-hai ^{[1
]}

机构：

[1] Shanghai Univ Sci & Technol, Coll Power Engn, Shanghai 201800, Peoples R China

来源：

ICEET: 2009 INTERNATIONAL CONFERENCE ON ENERGY AND ENVIRONMENT TECHNOLOGY, VOL 1, PROCEEDINGS | 2009年

关键词：

Elliptic; Convective heat transfer; Flow resistance; Numerical calculation; FORCED-CONVECTION; CYLINDERS;

D O I：

10.1109/ICEET.2009.23

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Convective heat transfer and flow resistance characteristic around elliptical tubes with different axis radio K in cross flow are investigated in this paper. Eight types of elliptical tubes have been calculation using numerical method. The local and overall convective heat transfer coefficients and flow resistance coefficients are obtained with the Reynolds number ranging from 4000 to 80000. And the relationship of convective heat transfer and flow resistance with Reynolds and K is analyzed. At last, four types of elliptical tubes' local convective heat transfer characteristics are showed. The results show that the experimental data are found in good agreement with the calculated results by the type of K=2. Nusselt number is increasing and Euler number is decreasing with the increase of Re. It is found the local convective heat transfer coefficients vary with K, and the separation of the boundary layer shifts downstream with the increase of K.

引用

页码：67 / 70

页数：4

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