The effects of roughness types on friction factors and heat transfer in roughened rectangular duct

被引：82

作者：

Ahn, SW ^{[1
]}

机构：

[1] Gyeongsang Natl Univ, Inst Marine Ind, Sch Transport Vehicle Engn, Kyongnam 650160, South Korea

来源：

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER | 2001年 / 28卷 / 07期

关键词：

D O I：

10.1016/S0735-1933(01)00297-4

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A comparison of fully developed heat transfer and friction factor characteristics has been made in rectangular ducts with ones roughened by five different shapes. The effects of rib shape geometries and Reynolds numbers are examined. The rib height-to-duct hydraulic diameter, pitch-to-height ratio, and aspect ratio of channel width to height are fixed at e/De = 0.0476, P/e = 8, and W/H = 2.33, respectively. To understand the mechanisms of the heat transfer enhancements, the measurements of the friction factors are also conducted in the smooth and rough channels. The data indicates that the triangular type rib has a substantially higher heat transfer performance than any other ones in the range we studied. (C) 2001 Elsevier Science Ltd.

引用

页码：933 / 942

页数：10

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