Turbulent heat transfer and friction in four-wall convergent/divergent square channels with one ribbed wall

被引：0

作者：

Whan, Ahn Soo ^{[1
]}

Sung, Lee Myung ^{[1
]}

机构：

[1] Dept. of Mechanical and System Engineering, Institute of Marine Industry, Gyeongsang National University

来源：

Transactions of the Korean Society of Mechanical Engineers, B | 2015年 / 39卷 / 10期

关键词：

Convergent/divergent channel; Heat transfer; Rib; Thermal performance; Total friction factor;

D O I：

10.3795/KSME-B.2015.39.10.773

中图分类号：

学科分类号：

摘要：

The local heat transfer and pressure drop of developed turbulent flows in convergent/divergent channels with square axial cross-sectional areas were experimentally investigated to improve the channel design, such as a gas turbine cooling system. Square convergent/divergent channels with one ribbed wall were manufactured with a fixed rib height e of 10 mm and a ratio of rib spacing p to height e of 10. The measurement was conducted for Reynolds numbers from 15,000 to 89,000. Convergent, divergent, and straight channels with ratios Dho/Dhi of 0.75, 1.33, and 1.0, respectively, are considered. Of the three channel types, the ribbed divergent channel was found to produce the best thermal performance under identical flow rate, pumping power, and pressure loss conditions. © 2015 The Korean Society of Mechanical Engineers.

引用

页码：773 / 778

页数：5

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