Numerical investigation of heat transfer enhancement in a dimpled cooling channel with different angles of the vortex generator

被引：21

作者：

Jeong, Myunggeun ^{[1
]}

Ha, Man Yeong ^{[1
]}

Park, Yong Gap ^{[2
,3
]}

机构：

[1] Pusan Natl Univ, Sch Mech Engn, Jang Jeon 2 Dong, Busan 609735, South Korea

[2] Rolls Royce, Jang Jeon 2 Dong, Busan 609735, South Korea

[3] Pusan Natl Univ, Technol Ctr Thermal Management, Jang Jeon 2 Dong, Busan 609735, South Korea

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2019年 / 144卷

关键词：

Dimpled cooling channel; Heat transfer enhancement; Vortex generator; Direct numerical simulation; FRACTIONAL-STEP METHOD; FLOW STRUCTURE; DIFFERENT CIRCULATIONS; INJECTANT DOWNSTREAM; SURFACES; DEPTHS; NUMBER; PREDICTIONS; VORTICES;

D O I：

10.1016/j.ijheatmasstransfer.2019.118644

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This study carried out numerical simulations to investigate the flow and heat transfer characteristics for air flowing in a dimpled cooling channel with a vortex generator. A crescent-shaped protrusion was mounted as a vortex generator on the downstream of the dimple. A direct numerical simulation (DNS) was conducted in a dimpled cooling channel with a Reynolds number of 2800. Seven different cases were considered, including one general dimpled wall and dimpled wall with six different angles inside the vortex generator. For the vortex generator mounted cases, the main design variable is the angle inside the vortex generator, which varies from 0 to 75 degrees. The normalized thermo-performance factors were calculated to estimate the performance of the cooling channel. The normalized thermo-performance factors f/f(0), j/j(0), and the volume goodness factor decreases as theta increases. The dimpled channel with a vortex generator shows better normalized thermo-performances than the general dimpled channel. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页数：13

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