Turbulent flow characteristics and heat transfer enhancement in a rectangular channel with elliptical cylinders and protrusions of various heights

被引：15

作者：

Xie, Gongnan ^{[1
]}

Song, Yidan ^{[1
]}

Simon, Terrence W. ^{[2
]}

机构：

[1] Northwestern Polytech Univ, Dept Mech & Power Engn, Sch Marine Sci & Technol, Xian, Shaanxi, Peoples R China

[2] Univ Minnesota, Dept Mech Engn, 111 Church St SE, Minneapolis, MN 55455 USA

来源：

NUMERICAL HEAT TRANSFER PART A-APPLICATIONS | 2017年 / 72卷 / 06期

基金：

中国国家自然科学基金;

关键词：

PIN-FIN; NUMERICAL PREDICTION; OPTIMIZATION; DIMPLES; ARRAYS;

D O I：

10.1080/10407782.2017.1386507

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This numerical study investigates turbulent flow characteristics and heat transfer augmentation in a rectangular channel with elliptical cylinders and protrusions. The height of protrusions is changed to quantify interactions with surrounding elliptical cylinders. Flow structures, temperature distributions, and heat transfer characteristics are obtained with a standard k - epsilon turbulence closure model. Cases are run at Reynolds numbers of 15,000 and 20,000. Combinations of protrusion and elliptical cylinder geometries give higher heat transfer rates than a case without protrusions. Additionally, Nusselt numbers increase with increases in height of protrusions and an optimum height-to-footprint diameter ratio is found.

引用

页码：417 / 432

页数：16

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