Influence on fluid flow and heat transfer of a bionic fin in plate-fin heat exchanger

被引：2
|
作者：
Liu, Jingcheng [1 ]
Zhang, Shuyou [1 ]
Zhou, Zhiyong [2 ]
机构：
[1] The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou
[2] Design Institute of National Technology Research Center, Hangzhou Hangyang Co., Ltd., Hangzhou
来源：
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2015年 / 51卷 / 12期
关键词：
Cocking-up structure; Plate-fin heat exchanger; Shark gill fin; Turbulence effect;
D O I：
10.3901/JME.2015.12.161
中图分类号：
学科分类号：
摘要：
The effect of fluid flow and heat transfer caused by fins in plate-fin heat exchanger is investigated, and then a new kind of fins, called shark gill fin, is proposed. The main functions of this kind of fins include enlarging fluid turbulence effect, changing flow direction in the same layer of fins, promoting fluid flow among channels, decreasing fluid temperature difference in the same cross-section and finally promoting heat exchange efficiency. The temperature, velocity, pressure and turbulence field under twelve conditions are analyzed by changing cocking-up structure and opening size in shark gill fin and finally, the distribution of fluid flow, temperature, dynamic pressure and turbulent intensity under steady state conditions are achieved. It can be concluded that when the opening size is 1 mm, the fluid velocity difference can reach by 47.38%, the temperature difference can reach by 0.7 ℃/m, the turbulent intensity difference can reach by 0.816%. When cocking-up structure is 10°, the fluid turbulent intensity can reach by 3.162%, the temperature difference can reach by 1 ℃/m. The results demonstrate that, in view of fluid flow, the effect of opening size is more important than cocking-up degree while, in view of temperature field, the opening size is less important than the cocking-up degree, besides, the cocking-up degree has less effect on fluid velocity and dynamic pressure. ©, 2015, Journal of Mechanical Engineering. All right reserved.
引用
收藏
页码：161 / 169
页数：8
相关论文
共 21 条
  • [1] Dong J., Chen J., Yuan Q., Et al., Flow and heat transfer on compact smooth fin surface, Transactions of the Chinese Society for Agricultural Machinery, 38, 8, pp. 53-56, (2007)
  • [2] Elshafei E.A.M., Natural convection heat transfer from a heat sink with hollow/perforated circular pin fins, Energy, 35, pp. 2870-2877, (2010)
  • [3] Harley C., Moitsheki R.J., Numerical investigation of the temperature profile in a rectangular longitudinal fin, Nonlinear Analysis: Real World Applications, 13, pp. 2343-2351, (2012)
  • [4] Gnanasekaran N., Balaji C., A Bayesian approach for the simultaneous estimation of surface heat transfer coefficient and thermal conductivity from steady state experiments on fins, International Journal of Heat and Mass Transfer, 54, pp. 3060-3068, (2011)
  • [5] Kundu B., Bhanja D., Lee K.S., A model on the basis of analytics for computing maximum heat transfer in porous fins, International Journal of Heat and Mass Transfer, 55, 25-26, pp. 7611-7622, (2012)
  • [6] Yang K.S., Chu W.H., Chen I.Y., Et al., A comparative study of the airside performance of heat sinks having pin fin configuration, International Journal of Heat and Mass Transfer, 50, pp. 4661-4667, (2007)
  • [7] Ismail L.S., Ranganayakulu C., Shah R.K., Numerical study of flow patterns of compact plate-fin heat exchangers and generation of design data for offset and wavy fins, International Journal of Heat and Mass Transfer, 52, pp. 3972-3983, (2009)
  • [8] Gorla R.S.R., Bakier A.Y., Thermal analysis of natural convection and radiation in porous fins, International Communications in Heat and Mass Transfer, 38, pp. 638-645, (2011)
  • [9] Wongwises S., Chokeman Y., Effect of fin pitch and number of tube rows on the air side performance of herringbone wavy fin and tube heat exchangers, Energy Conversion and Management, 46, pp. 2216-2231, (2005)
  • [10] Babus'haq R.F., Akintunde K., Probert S.D., Thermal performance of a pin-fin assembly, International Journal of Heat and Fluid Flow, 16, 1, pp. 50-55, (1995)
123