Influence of co/counter arrangements of multiple twisted-tape bundles on heat transfer intensification

被引：24

作者：

Eiamsa-ard, S. ^{[1
]}

Changcharoen, W. ^{[1
]}

Beigzadeh, R. ^{[2
]}

Eiamsa-ard, P. ^{[3
]}

Wongcharee, K. ^{[1
]}

Chuwattanakul, V. ^{[4
]}

机构：

[1] Mahanakorn Univ Technol, Fac Engn, Bangkok, Thailand

[2] Univ Kurdistan, Fac Engn, Sanandaj, Iran

[3] Rajabhat Rajanagarindra Univ, Fac Ind Technol, Chachoengsao, Thailand

[4] King Mongkuts Inst Technol Ladkrabang, Fac Engn, Bangkok, Thailand

来源：

CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION | 2021年 / 160卷

关键词：

Heat transfer intensification; Multiple tapes; Swirling flow; Twisted tape bundle;

D O I：

10.1016/j.cep.2021.108304

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Heat transfer intensification in tubes containing multiple twisted-tape bundle inserts was experimentally investigated. The experimental parameters included the tape numbers (N) of 2, 4 and 6 pieces, tape twist ratios (y/w) of 4.0, 5.0 and 6.0) and two different tape arrangements: co-swirl tapes (CoT) and counter-swirl tapes (CT). The tests were carried out using air as the working fluid under a constant heat flux. The experimental results showed that all multiple twisted tape bundles caused higher heat transfer rates, pressure losses and thermal hydraulic performance than a typical twisted tape. The heat transfer rate (Nu) and friction factor (f) increased with the number of tapes (N) and decreased with the twist ratio (y/w). At similar operating conditions, the counter-swirl flow twisted tape sets (CT) provided higher heat transfer (Nu) and friction factors (f) than the co swirl flow sets (CoT). The highest thermal hydraulic performance (eta) of 1.33, was offered by the twisted tapes having y/w = 4.0 and N = 6 at Re = 6000.

引用

页数：16

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