Optimum design of a channel roughened by dimples to improve cooling performance

被引：0

作者：

Samad A. ^{[1
]}

Lee K.-D. ^{[1
]}

Kim K.-Y. ^{[1
]}

Kim J.-H. ^{[1
]}

机构：

[1] Department of Mechanical Engineering, Inha University, Incheon

来源：

Frontiers of Energy and Power Engineering in China | 2010年 / 4卷 / 2期

基金：

新加坡国家研究基金会;

关键词：

Heat Transfer; Nusselt Number; RANS; Friction Factor; Heat Transfer Rate;

D O I：

10.1007/s11708-010-0012-2

中图分类号：

学科分类号：

摘要：

Staggered arrays of dimples imprinted on opposite surfaces of an internal flow channel have been formulated numerically to enhance turbulent heat transfer compromising with pressure drop. The channel is simulated with the help of three-dimensional Reynoldsaveraged Navier-Stokes (RANS) analysis. Three nondimensional design variables based on dimple size and channel dimensions and two objectives related to heat transfer and pressure drag have been considered for shape optimization. A weighted-sum method for multi-objective optimization is applied to integrate multiple objectives into a single objective and polynomial response surface approximation (RSA) coupling with a gradient based search algorithm has been implemented as optimization technique. By the present effort, heat transfer rate is increased much higher than pressure drop and the thermal performance also has shown improvement for the optimum design as compared to the reference one. The optimum design produces lower channel height, wider dimple spacing, and deeper dimple as compared to the reference one. © 2010 Higher Education Press and Springer Berlin Heidelberg.

引用

页码：262 / 268

页数：6

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