Experimental study on convective heat transfer in alternating elliptical axis tubes

被引：90
|
作者：
Meng, JA [1 ]
Liang, XG [1 ]
Chen, ZJ [1 ]
Li, ZX [1 ]
机构：
[1] Tsing Hua Univ, Dept Mech Engn, Educ Minist Key Lab Enhanced Heat Transfer & Ener, Beijing 100084, Peoples R China
来源：
EXPERIMENTAL THERMAL AND FLUID SCIENCE | 2005年 / 29卷 / 04期
关键词：
convective heat transfer; field-coordination; alternating elliptical axis tube;
D O I：
10.1016/j.expthermflusci.2004.04.006
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Experiments are carried out on the convection inside a novel alternating elliptical axis tube. The unified correlations of heat transfer and flow resistance for 500 < Re < 5 x 10(4) are obtained from the experimental results. The experiments show that the heat transfer can be greatly enhanced with less flow resistance increment compared with other enhanced elements. Analyses indicate that the mechanism for heat transfer enhancement is mainly due to the effect of the multi-longitudinal vortices induced by the cross-sectional change in the alternating elliptical axis tubes. (C) 2004 Elsevier Inc. All rights reserved.
引用
收藏
页码：457 / 465
页数：9
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