Journal of Jilin University(Engineering and Technology Edition) ›› 2021, Vol. 51 ›› Issue (6): 1933-1942.doi: 10.13229/j.cnki.jdxbgxb20210186

   

Influence investigation of cooling tube structure and airflow direction on thermal⁃hydraulic performance of air⁃cooled charge air cooler

Xing-jun HU1(),Jing-long ZHANG1,Yu-fei LUO1,Li XIN1,Sheng LI2,Jin-rui HU2,Wei LAN1()   

  1. 1.State Key Laboratory of Automotive Simulation and Control，Jilin University，Changchun 130022，China
    2.China FAW Jiefang Automotive Co. ，Ltd. ，Qingdao 266043，China
  • Received:2021-03-11 Online:2021-11-01 Published:2021-11-15
  • Contact: Wei LAN E-mail:hxj@jlu.edu.cn;lanwei@jlu.edu.cn

RICH HTML

 27   

PDF (PC)

211

Abstract:

In this paper, the static pressure drop and heat transfer coefficient of the cold side of the benchmark air-cooled Charge Air Cooler (CAC) at different speeds are obtained through experimental methods. Then the experimental values are verified by computational fluid dynamics methods. Results show that for the static pressure drop, the absolute error between experimental values and simulation values is less than 7%, and for heat transfer coefficient the error is less than 15%, which indicates the accuracy of the current simulation. After the validation, computational fluid dynamics method was applied to investigate the influence of the leading edge radius R1 of the cooling pipe and the airflow direction β on the cold side thermal and hydraulic performance of the CAC under the airflow speed of 6 m/s. Research results show that, when R1=3.6 mm and β=90°, the Fanning friction factor f achieves the minimum value in each working condition; when R1=0 mm and β=90°, Nusselt number Nu reaches the maximum value in all working conditions; and when R1=3.6 mm and β=90°, the Performance Evaluation Criterion (PEC) for the thermal and hydraulic performance of the CAC obtaines the maximum value in each working condition.

Key words: vehicle engineering, air-cooled charge air cooler, leading-edge structure of cooling tube, airflow direction, computational fluid dynamics, thermal-hydraulic performance

CLC Number: 

  • U461.8

Fig.1

Air-cooled charge air cooler"

Table1

Structural parameters"

参数数值参数数值
冷却管长度Lt/mm604百叶间距Lp/mm3
冷却管宽度Wt/mm50百叶翅片长度LLF/mm50
冷却管高度Ht/mm8百叶高度Lh/mm10.5
冷却管厚度Tt/mm0.45锯齿翅片下宽度sSF/mm3.85
百叶开窗角度φ/（°）10锯齿翅片长度lSF/mm8.25
百叶翅片间距PLF/mm2.75锯齿翅片高度hSF/mm7.1
百叶翅片厚度tLF/mm0.1锯齿翅片厚度tSF/mm0.12
百叶翅片高度hLF/mm12锯齿翅片倾角θ/（°）85

Fig.2

Test facility"

Fig.3

Computational domain"

Fig.4

Different cooling tube leading edge structure"

Fig.5

Mesh independence validation"

Fig.6

Experimental and simulation validation"

Fig.7

Relationship between R1 and f under different β"

Fig.8

Velocity at mid XY plane under different R1 when β=30°"

Fig.9

Velocity at mid XY plane under different β when R1=0"

Fig.10

Relationship between R1 and Nu under different β"

Fig.11

Temperature at mid XY plane under different R1 when β=30°"

Fig.12

Temperature at mid XY plane under different β when R1=0 mm"

Fig.13

Relationship between R1 and PECunder different β"

1 Ramesh K S. 换热器设计技术[M]. 程林, 译. 北京:机械工业出版社, 2010: 168-172.
2 Djamel S, Ameur H, Mellal M. Effect of tube shape on the performance of a fin and tube heat exchanger[J]. Journal of Mechanical Engineering and Science, 2020, 14(2): 6709-6718.
3 Huminic G, Huminic A. A numerical approach on hybrid nanofluid behavior in laminar duct flow with various cross sections[J]. Journal of Thermal Analysis and Calorimetry, 2020, 140: 2097-2110.
4 Deepakkumar R, Jayavel S. Air side performance of finned-tube heat exchanger with combination of circular and elliptical tubes[J]. Applied Thermal Engineering, 2017, 119: 360-372.
5 Khoo K L, Lewpiriyawong N, Sun C, et al. Numerical investigation of thermal and hydraulic performances of a condenser coil with oblique-shaped tubes[J]. International Journal of Refrigeration, 2019, 103: 42-50.
6 赵津,马秀勤,李梅珺,等. 收腰管散热器的耦合传热与试验[J]. 中国机械工程, 2016, 27(16): 2166-2171.
Zhao Jin, Ma Xiu-qin, Li Mei-jun, et al. Coupled heat transfer and experiments of waist tube heat exchanger[J]. China Mechanical Engineering, 2016, 27(16): 2166-2171.
7 Jassim A H, Tahseen T A, Mustafa A W, et al. An experimental investigation in forced convective heat transfer and friction factor of air flow over aligned round and flattened tube banks[J]. Heat Transfer—Asian Research, 2019, 48(6): 2350-2369.
8 Liang Y Y, Liu C C, Li C Z, et al. Experimental and simulation study on the air side thermal hydraulic performance of automotive heat exchangers[J]. Applied Thermal Engineering, 2015, 87: 305-315.
9 Shojaeefard M H, Molaeimanesh G R, Yarmohammadi A, et al. Multi-objective optimization of an automotive louvered fin-flat tube condenser for enhancing HVAC system cooling performance[J]. Applied Thermal Engineering, 2017, 125: 546-558.
10 Karthik P, Kumaresan V, Velraj R. Experimental and parametric studies of a louvered fin and flat tube compact heat exchanger using computational fluid dynamics[J]. Alexandria Engineering Journal, 2015, 54(4): 905-915.
11 Deng J. Improved correlations of the thermal-hydraulic performance of large size multi-louvered fin arrays for condensers of high power electronic component cooling by numerical simulation[J]. Energy Conversation and Management, 2017, 153:504-514.
12 Ryu K, Lee K S. Generalized heat-transfer and fluid-flow correlations for corrugated louvered fins[J]. International Journal of Heat and Mass Transfer, 2015, 83: 604-612.
13 Dongan B, Altun O, Ugurlubilek N, et al. An experimental comparison of two multi-louvered fin heat exchangers with different numbers of fin rows[J]. Applied Thermal Engineering, 2015, 91: 270-278.
14 Toolthaisong S, Kasayapanand N. Effect of attack angles on air side thermal and pressure drop of the cross flow heat exchangers with staggered tube arrangement[J]. Energy Procedia, 2013, 34: 417-429.
15 Tang L H, Du X P, Pan J, et al. Air inlet angle influence on the air-side heat transfer and flow friction characteristics of a finned oval tube heat exchanger[J]. International Heat and Mass Transfer, 2019, 145: No.118702.
16 Kim M H, Youn B, Bullard C W. Effect of inclination on the air-side performance of a brazed aluminum heat exchanger under dry and wet conditions[J]. International Heat and Mass Transfer, 2001, 44(24): 4613-4623.
17 Henriksson L, Gullberg P, Dahl E, et al. CFD simulation of one period of a louvered fin where the airflow is inclined relative to the heat exchanger[J]. SAE International Journal of Engines, 2015, 8(4): 1733-1741.
18 Taylor J R. 误差分析导论——物理测量中的不确定度[M]. 王中宇,译. 北京: 高等教育出版社, 2015.
19 傅佳宏, 俞小莉, 药凌宇, 等. 工程机械独立式冷却模块流动传热仿真对比[J].吉林大学学报:工学版, 2016, 46(2): 451-456.
Fu Jia-hong, Yu Xiao-li, Yao Ling-yu, et al. Numerical comparison of flow and heat transfer in detached cooling module for construction machinery[J]. Journal of Jilin University (Engineering and Technology Edition), 2016, 46(2): 451-456.
20 Manglik R M, Bergles A E. Heat transfer and pressure drop correlations for the rectangular offset strip fin compact heat exchanger[J]. Experimental Thermal and Fluid Science, 1995, 10(2): 171-180.
21 胡兴军,张靖龙,辛俐,等.冷却管结构及风速对空冷中冷器性能的影响[J]. 吉林大学学报:工学版,2021, 51(5): 1557-1564.
Hu Xing-jun, Zhang Jing-long, Xin Li, et al. Investigation on influence of cooling tube structure and airflow speed on cold side performance of air⁃cooled charge air cooler[J]. Journal of Jilin University (Engineering and Technology Edition), 2021, 51(5): 1557-1564.
22 Kays W M, London A L. Compact heat exchangers[M]. Florida: Krieger Publishing Company, 1984.
23 Karthik P, Kumaresan V, Velraj R. Experimental and parametric studies of a louvered fin and flat tube compact heat exchanger using computational fluid dynamics[J]. Alexandria Engineering Journal, 2015, 54(4): 905-915.
24 林建忠, 阮晓东, 陈邦国,等. 流体力学[M]. 2版. 北京:清华大学出版社, 2013.
25 Perrotin T, Clodic D. Thermal-hydraulic CFD study in louvered fin-and-flat-tube heat exchangers[J]. International Journal of Refrigeration, 2004, 27(4): 422-432.
26 Versteeg H K, Malalasekera W. 计算流体动力学导论:有限体积法[M]. 北京:世界图书出版公司, 2007.
27 Webb R L, Kim N. Principle of Enhanced Heat Transfer[M]. New York: Taylor and Francis Group, 2005.
[1] Yong LUO,Yong-heng WEI,Huan HUANG,Ren-jie XIAO,Lin REN,Huan-yu CUI. Starting control of P2.5 plug⁃in hybrid configuration dual⁃clutch based on driver's intention recognition [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(5): 1575-1582.
[2] Xiao-hua ZENG,Mei-jie SONG,Da-feng SONG,Yue WANG. Data processing method of bus driving cycle based on vehicular network information [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(5): 1692-1699.
[3] Xing-jun HU,Jing-long ZHANG,Li XIN,Yu-fei LUO,Jing-yu WANG,Tian-ming YU. Investigation on influence of cooling tube structure and airflow speed on cold side performance of air⁃cooled charge air cooler [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(5): 1557-1564.
[4] Chao MA,Yun-kai GAO,Zhe LIU,Yue-xing DUAN,Lin-li TIAN. Optimization of multi⁃material and beam cross⁃sectional shape and dimension of skeleton⁃type body [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(5): 1583-1592.
[5] Feng-chong LAN,Ji-wen LI,Ji-qing CHEN. DG-SLAM algorithm for dynamic scene compound deep learning and parallel computing [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(4): 1437-1446.
[6] Jian YANG,Qi XIA,Hai-chao ZHOU,Guo-lin WANG. Noise reduction mechanism of truck radial tire based on modified carcass string contour design [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(4): 1198-1203.
[7] Jiang-qi LONG,Jin-tao XIANG,Ping YU,Jun-cheng WANG. Linear disturbance observer suitable for sliding mode control of nonlinear active suspension [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(4): 1230-1240.
[8] Xin CHEN,Gui-shen YU,Biao ZHANG,Kai-xuan PAN,Li-fei YANG. Equivalent modeling of tensile-shear behavior for friction stir spot welding joints [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(4): 1190-1197.
[9] Da-feng SONG,Li-li YANG,Xiao-hua ZENG,Xing-qi WANG,Wei-zhi LIANG,Nan-nan YANG. Battery life optimization of hybrid electric vehicle based on driving cycle construction [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(3): 781-791.
[10] Jia-xu ZHANG,Xin-zhi WANG,Jian ZHAO,Zheng-tang SHI. Path planning and discrete sliding mode tracking control for high⁃speed lane changing collision avoidance of vehicle [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(3): 1081-1090.
[11] Ren HE,Xiao-cong ZHAO,Yi-bin YANG,Jian-qiang WANG. Man⁃machine shared driving model using risk⁃response mechanism of human driver [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(3): 799-809.
[12] Bo WANG,Yang-yang HE,Bing-bing NIE,Shu-cai XU,Jin-huan ZHANG. Abdominal injury of vehicle occupant in underbody blast events [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(3): 792-798.
[13] Wei-min ZHUANG,Peng-yue WANG,Rui-juan GAO,Dong-xuan XIE. Effect of hot forming on static mechanical properties of AA5754 aluminum alloy [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(3): 847-854.
[14] Qiang SONG,Dan-ting SUN,Wei ZHANG. Shift nonlinear modeling and control of automated mechanical transmission in pure electric vehicle [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(3): 810-819.
[15] Bin ZHANG,Guo-zan CHENG,Hao-cen HONG,Chun-Xiao ZHAO,Hua-yong YANG. Cavitation mechanism of double⁃acting vane pump based on computational fluid dynamics simulation method [J]. Journal of Jilin University(Engineering and Technology Edition), 2021, 51(3): 831-839.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
Copyright © Journal of Jilin University(Engineering and Technology Edition), All Rights Reserved.
Tel: +86-431-85095297　Fax: +86-431-85094074　E-mail: xbgxb@jlu.edu.cn
Powered by Beijing Magtech Co. Ltd