Analysis on thermal hydraulic performance of the elliptical tube in the finned-tube heat exchanger by new method

被引：22

作者：

Wang, Qiang ^{[1
]}

Qian, Zuoqin ^{[1
]}

Cheng, Junlin ^{[1
]}

Huang, Weilong ^{[1
]}

Ren, Jie ^{[1
]}

机构：

[1] Wuhan Univ Technol, Sch Energy & Power Engn, Wuhan 430063, Hubei, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2019年 / 134卷

关键词：

Karman vortex street; Wake region; Thermal hydraulic performance; FLUID-FLOW CHARACTERISTICS; TRANSFER ENHANCEMENT; PRESSURE-DROP; CIRCULAR TUBE; RESISTANCE; CFD;

D O I：

10.1016/j.ijheatmasstransfer.2019.01.001

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The main objectives were to develop a method for designing an effective finned heat exchanger through changing the configuration to ensure the tubes be streamlined shape. Kinds of inserts including, vortex generator, louver fin, and serrated fin in the heat transfer was used to increase the effect of thermal performance, but also was harmful to the flow characteristics. Consequently, the comprehensive performance was obviously lower than the heat exchangers with no inserts. In order to solve this problem, streamlined tube configuration was adopted in this paper to search a new method to enhance the comprehensive performance by reducing the Karman vortex street effect. Two modified configurations of tube were investigated in this paper. The modified configurations were both made of semicircular tube and semielliptical tube. The simulation was validated by Wang's experiment and Arafat's simulation. The numerical data were presented at Reynolds number in the range between 1300 and 2000. Based on the numerical results, the effect of elliptical axis ratio on the thermal hydraulic performance was discussed. The results showed that the comprehensive performance of the modified configurations was greater than that of the circular tube. In addition, the velocity vector, flow streamline and temperature contour of the configurations were displayed. The Karman vortex street effect was adopted to explain the reason of wake region formation. It can be concluded that long and thin section of heat transfer tube, which was coincident with streamlined design, was beneficial to improve the comprehension performance of the heat exchanger. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：388 / 397

页数：10

共 32 条

[1] Heat Transfer and Turbulent Fluid Flow Over Staggered Circular Tube Bank [J].

Abdel-Rehim, Z. S. .

ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS, 2015, 37 (02) :164-173

[2] Flow and heat transfer enhancement in tube heat exchangers [J].

Ahmed, Sayed Ahmed E. Sayed ;

Mesalhy, Osama M. ;

Abdelatief, Mohamed A. .

HEAT AND MASS TRANSFER, 2015, 51 (11) :1607-1630

[3]

[Anonymous], 1986, AIAA 24 AER SCI M AM

[4]

[Anonymous], 2014, Beni-Suef University Journal of Basic and Applied Sciences, DOI [10.1016/j.bjbas.2014.12.001, DOI 10.1016/J.BJBAS.2014.12, 10.1016/j.bjbas.2014.12, DOI 10.1016/J.BJBAS.2014.12.001]

[5]

[Anonymous], 2009, Fluent, Version 6.3

[6] Three-dimensional performance analysis of plain fin tube heat exchangers in transitional regime [J].

Bhuiyan, Arafat A. ;

Amin, M. Ruhul ;

Islam, A. K. M. Sadrul .

APPLIED THERMAL ENGINEERING, 2013, 50 (01) :445-454

[7] Simplified analysis of thermal contact resistance on arc-slotted fin core [J].

Deng, Jun ;

Qian, Zuoqin .

APPLIED THERMAL ENGINEERING, 2017, 125 :266-284

[8] Heat transfer enhancement and pressure drop for fin-and-tube compact heat exchangers with wavy rectangular winglet-type vortex generators [J].

Gholami, A. A. ;

Wahid, Mazlan A. ;

Mohammed, H. A. .

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2014, 54 :132-140

[9] Thermal-hydraulic performance of fin-and-oval tube compact heat exchangers with innovative design of corrugated fin patterns [J].

Gholami, Ahmadali ;

Wahid, MazIan A. ;

Mohammed, H. A. .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2017, 106 :573-592

[10] Influence of the louver and delta winglet geometry on the thermal hydraulic performance of a compound heat exchanger [J].

Huisseune, H. ;

T'Joen, C. ;

De Jaeger, P. ;

Ameel, B. ;

De Schampheleire, S. ;

De Paepe, M. .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2013, 57 (01) :58-72

← 1 2 3 4 →