Numerical investigations for the optimization of serrated finned-tube heat exchangers

被引：74

作者：

Lemouedda, A. ^{[1
,2
]}

Schmid, A. ^{[1
]}

Franz, E. ^{[1
]}

Breuer, M. ^{[3
]}

Delgado, A. ^{[2
]}

机构：

[1] Georg Simon Ohm Univ Appl Sci, Dept Proc Engn, D-90489 Nurnberg, Germany

[2] Univ Erlangen Nurnberg, Inst Fluid Mech, D-91056 Erlangen, Germany

[3] Helmut Schmidt Univ Hamburg, Inst Mech, Dept Fluid Mech, D-22043 Hamburg, Germany

来源：

APPLIED THERMAL ENGINEERING | 2011年 / 31卷 / 8-9期

关键词：

Heat exchangers; Heat transfer enhancement; Serrated finned-tubes; Segmented fins; Fin twisting; TRANSFER ENHANCEMENT; VORTEX GENERATORS; PERFORMANCE; CHANNEL; FLOW;

D O I：

10.1016/j.applthermaleng.2010.12.035

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Helical serrated finned-tubes are well established in many thermal systems. This paper presents the results of numerical calculations carried out for the performance improvement of these devices. The work is divided into three main investigations conducted for Reynolds numbers between Re = 600 and 2600. The first investigation shows the effect of the fin serration, where a comparison between performances of finned tubes with and without fin serration is presented. Another main investigation is conducted on the effect of fin twisting of the outermost part of the fin on the performance of the serrated finned-tubes. Here, twisting angles considered are between beta = 0 degrees and 25 degrees. The third investigation deals with the effect of the number of fin segments per period. (c) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1393 / 1401

页数：9