Heat transfer enhancement by helically twisted tapes inducing co- and counter-swirl flows

被引：41
作者：
Nanan, K. [1 ]
Yongsiri, K. [2 ]
Wongcharee, K. [3 ]
Thianpong, C. [2 ]
Eiamsa-ard, S. [1 ]
机构：
[1] Mahanakorn Univ Technol, Dept Mech Engn, Fac Engn, Bangkok 10530, Thailand
[2] King Mongkuts Inst Technol Ladkrabang, Dept Mech Engn, Fac Engn, Bangkok 10520, Thailand
[3] Mahanakorn Univ Technol, Dept Chem Engn, Fac Engn, Bangkok 10530, Thailand
来源：
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER | 2013年 / 46卷
关键词：
Heat transfer enhancement; Friction factor; Helically twisted tape; Co-/counter-arrangement; TRANSFER AUGMENTATION; PERFORMANCE; EXCHANGERS; LAMINAR; INSERTS;
D O I：
10.1016/j.icheatmasstransfer.2013.05.015
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
An experimental investigation has been conducted for determining heat transfer enhancement by inserting helically twisted tapes, to induce co- and counter-swirl flows, (the tapes are symbolized as co-HTT and C-HTT, respectively). Tape pitch ratio (p/D) was varied between 1.0 and 2.0, while tape width ratio (w/D) and twist ratio (y/w) were fixed at 0.2 and 3.0, respectively. The experiments were performed for fully developed turbulent flow with Reynolds number range (Re) between 6000 and 20,000, under uniform wall heat flux condition. At similar conditions, the use of Co-HTT results in lower Nusselt number and friction factor but higher thermal performance factor than that of C-HTT. Nusselt number and friction factor increase with decreasing pitch ratio, while thermal performance factor possesses opposite trend. In addition, the empirical correlations for Nusselt number, friction factor and thermal performance factor as functions of the Reynolds number (Re), Prandtl number (Pr) and tape pitch (p/D), were developed through a multi-variant linear normal regression. (c) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：67 / 73
页数：7
相关论文
共 12 条
[1]   Heat transfer and exergy loss in cut out conical turbulators [J].
Durmus, A .
ENERGY CONVERSION AND MANAGEMENT, 2004, 45 (05) :785-796
[2]   Experimental investigation of heat transfer and friction characteristics in a circular tube fitted with V-nozzle turbulators [J].
Eiamsa-ard, S. ;
Promvonge, P. .
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2006, 33 (05) :591-600
[3]   Heat transfer augmentation by helically twisted tapes as swirl and turbulence promoters [J].
Eiamsa-ard, S. ;
Yongsiri, K. ;
Nanan, K. ;
Thianpong, C. .
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION, 2012, 60 :42-48
[4]   Heat Transfer Behavior in a Square Duct with Tandem Wire Coil Element Insert [J].
Eiamsa-ard, Smith ;
Koolnapadol, Narin ;
Promvonge, Pongjet .
CHINESE JOURNAL OF CHEMICAL ENGINEERING, 2012, 20 (05) :863-869
[5]   Experimental study of heat transfer enhancement with wire coil inserts in laminar-transition-turbulent regimes at different Prandtl numbers [J].
García, A ;
Vicente, PG ;
Viedma, A .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2005, 48 (21-22) :4640-4651
[6]   Enhancement of laminar and transitional flow heat transfer in tubes by means of wire coil inserts [J].
Garcia, Alberto ;
Solano, Juan P. ;
Vicente, Pedro G. ;
Viedma, Antonio .
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2007, 50 (15-16) :3176-3189
[7]  
Incropera F.P., 2006, Fundamentals of Heat and Mass Transfer, V6th
[8]   Experimental investigation of convective heat transfer and pressure loss in a round tube fitted with circular-ring turbulators [J].
Kongkaitpaiboon, V. ;
Nanan, K. ;
Eiamsa-ard, S. .
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2010, 37 (05) :568-574
[9]   Heat transfer augmentation in a circular tube using V-nozzle turbulator inserts and snail entry [J].
Promvonge, Pongjet ;
Eiamsa-ard, Smith .
EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2007, 32 (01) :332-340
[10]   Thermal performance evaluation of heat exchangers fitted with twisted-ring turbulators [J].
Thianpong, C. ;
Yongsiri, K. ;
Nanan, K. ;
Eiamsa-ard, S. .
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2012, 39 (06) :861-868
12