Journal of Mechanical Science and Technology

, Volume 32, Issue 12, pp 6021–6027 | Cite as

Numerical study on flow and heat transfer characteristics of air-jet cooling system

  • Joo Hyun Moon
  • Soyeong Lee
  • Jee Min Park
  • Jungho Lee
  • Daejoong Kim
  • Seong Hyuk Lee


The present study aims to numerically analyze the cooling characteristics of the air-jet array in designing more efficient air-cooling system. Heat transfer and flow characteristics are also examined under different operating conditions and air-jet arrangements. The commercial CFD program (FLUENT V. 17) is used for the designed configuration where 10 specimens are cooled by the air-jet arrangement. From the result, it is found that the inner jet arrangement can make the cooling performance higher because of substantial interaction between them in the flow direction. When inner jets are installed for cooling, there is a fluid mixing zone before the specimen by short jet-to-jet distance, leading to a decrease in heat transfer. Also, the fluid mixing zones are concentrated near to the specimen because of similar flow rate between outer and inner jets. Therefore, we suggest the appropriate configuration showing the best cooling efficiency when considered the air temperature, the heat transfer coefficient, and the flow usage. The number of nozzles of inner jets is 44, but highvelocity jet is used for preventing flow mixing among the inner jets. Consequently, cooling with the outer jets effectively occurs around the specimen. This result would be helpful in determining the jet velocity and its configuration between inner and outer jets that are essential for multiple specimens cooling.


Air jet Batch type Computational fluid dynamics (CFD) Fluid flow Heat transfer 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    D. Cooper, D. Jackson, B. E. Launder and G. Liao, Impinging jet studies for turbulence model assessment—I. Flowfield experiments, International Journal of Heat and Mass Transfer, 36 (1993) 2675–2684.CrossRefGoogle Scholar
  2. [2]
    S. Feng, J. Kuang, T. Wen, T. Lu and K. Ichimiya, An experimental and numerical study of finned metal foam heat sinks under impinging air jet cooling, International Journal of Heat and Mass Transfer, 77 (2014) 1063–1074.CrossRefGoogle Scholar
  3. [3]
    B. K. Friedrich, T. D. Ford, A. W. Glaspell and K. Choo, Experimental study of the hydrodynamic and heat transfer of air–assistant circular water jet impinging a flat circular disk, International Journal of Heat and Mass Transfer, 106 (2017) 804–809.CrossRefGoogle Scholar
  4. [4]
    R. Goldstein, A. Behbahani and K. K. Heppelmann, Streamwise distribution of the recovery factor and the local heat transfer coefficient to an impinging circular air jet, International Journal of Heat and Mass Transfer, 29 (1986) 1227–1235.CrossRefGoogle Scholar
  5. [5]
    T. M. Jeng, S. C. Tzeng and R. Xu, Heat transfer characteristics of a rotating cylinder with a lateral air impinging jet, International Journal of Heat and Mass Transfer, 70 (2014) 235–249.CrossRefGoogle Scholar
  6. [6]
    X. T. Trinh, M. Fénot and E. Dorignac, The effect of nozzle geometry on local convective heat transfer to unconfined impinging air jets, Experimental Thermal and Fluid Science, 70 (2016) 1–16.CrossRefGoogle Scholar
  7. [7]
    G. Poitras, A. Babineau, G. Roy and L. E. Brizzi, Aerodynamic and heat transfer analysis of an impinging jet on a concave surface, International Journal of Thermal Sciences, 114 (2017) 184–195.CrossRefGoogle Scholar
  8. [8]
    N. Zuckerman and N. Lior, Jet impingement heat transfer: Physics, correlations, and numerical modeling, Advances in Heat Transfer, 39 (2006) 565–631.CrossRefGoogle Scholar
  9. [9]
    M. Zukowski, Heat transfer performance of a confined single slot jet of air impinging on a flat surface, International Journal of Heat and Mass Transfer, 57 (2013) 484–490.CrossRefGoogle Scholar
  10. [10]
    F. A. Jafar, G. R. Thorpe and Ö. F. Turan, Flow visualization and heat transfer characteristics of liquid jet impingement, International Journal for Computational Methods in Engineering Science and Mechanics, 13 (2012) 239–253.CrossRefGoogle Scholar
  11. [11]
    B. P. Dano, J. A. Liburdy and K. Kanokjaruvijit, Flow characteristics and heat transfer performances of a semiconfined impinging array of jets: effect of nozzle geometry, International Journal of Heat and Mass Transfer, 48 (2005) 691–701.CrossRefGoogle Scholar
  12. [12]
    N. M. Jeffers, J. Punch, E. J. Walsh and M. McLean, Heat transfer from novel target surface structures to a 3 × 3 array of normally impinging water jets, Journal of Thermal Science and Engineering Applications, 2 (2010) 041004.CrossRefGoogle Scholar
  13. [13]
    S. Spring, Y. Xing and B. Weigand, An experimental and numerical study of heat transfer from arrays of impinging jets with surface ribs, Journal of Heat Transfer, 134 (2012) 082201.CrossRefGoogle Scholar
  14. [14]
    M. J. Rau and S. V. Garimella, Local two–phase heat transfer from arrays of confined and submerged impinging jets, International Journal of Heat and Mass Transfer, 67 (2013) 487–498.CrossRefGoogle Scholar
  15. [15]
    S. Yong, Z. Jing–zhou and X. Gong–nan, Convective heat transfer for multiple rows of impinging air jets with small jet–to–jet spacing in a semi–confined channel, International Journal of Heat and Mass Transfer, 86 (2015) 832–842.CrossRefGoogle Scholar
  16. [16]
    S. C. Siw, N. Miller, M. Alvin and M. Chyu, Heat transfer performance of internal cooling channel with single–row jet impingement array by varying flow rates, Journal of Thermal Science and Engineering Applications, 9 (2017) 011015.CrossRefGoogle Scholar
  17. [17]
    N. Zuckerman and N. Lior, Radial slot jet impingement flow and heat transfer on a cylindrical target, Journal of Thermophysics and Heat Transfer, 21 (2007) 548–561.CrossRefGoogle Scholar
  18. [18]
    J. Y. San and J.–J. Chen, Effects of jet–to–jet spacing and jet height on heat transfer characteristics of an impinging jet array, International Journal of Heat and Mass Transfer, 71 (2014) 8–17.CrossRefGoogle Scholar
  19. [19]
    S. Ghahremanian, K. Svensson, M. J. Tummers and B. Moshfegh, Near–field mixing of jets issuing from an array of round nozzles, International Journal of Heat and Fluid Flow, 47 (2014) 84–100.CrossRefGoogle Scholar
  20. [20]
    C. Srisamran and S. Devahastin, Numerical simulation of flow and mixing behavior of impinging streams of shearthinning fluids, Chemical Engineering Science, 61 (2006) 4884–4892.CrossRefGoogle Scholar
  21. [21]
    J. Zhang, Y. Liu, G. Qi, W. Jiao and Z. Yuan, Flow characteristics in the free impinging jet reactor by particle image velocimetry (PIV) investigation, Fluid Dynamics Research, 48 (2016) 045505.CrossRefGoogle Scholar
  22. [22]
    P. Penumadu and A. Rao, Numerical investigations of heat transfer and pressure drop characteristics in multiple jet impingement system, Applied Thermal Engineering, 11 (2017) 1511–1524.CrossRefGoogle Scholar
  23. [23]
    P. Wood, A. Hrymak, R. Yeo, D. Johnson and A. Tyagi, Experimental and computational studies of the fluid mechanics in an opposed jet mixing head, Physics of Fluids A: Fluid Dynamics, 3 (1991) 1362–1368.CrossRefGoogle Scholar
  24. [24]
    L. Kostiuk, K. Bray and R. Cheng, Experimental study of premixed turbulent combustion in opposed streams. Part I— Nonreacting flow field, Combustion, and Flame, 92 (1993) 377–395.CrossRefGoogle Scholar
  25. [25]
    S. P. Lynch, K. A. Thole, A. Kohli and C. Lehane, Computational predictions of heat transfer and film–cooling for turbine blade with nonaxisymmetric endwall contouring, Journal of Turbomachinery, 133 (2011) 041003.CrossRefGoogle Scholar
  26. [26]
    S. R. Lewis, L. Anumolu and M. F. Trujillo, Numerical simulations of droplet train and free surface jet impingement, International Journal of Fluid Flow, 44 (2013) 610–623.CrossRefGoogle Scholar
  27. [27]
    G. Horn and M. W. Thring, Angle of spread of free jets, Nature, 178 (1956) 205–206.CrossRefGoogle Scholar
  28. [28]
    Y. Kato, M. Omiya and H. Hoshino, Modelling of particle behaviour in shot peening process, Journal of Mechanical Engineering and Automation, 4 (2014) 83–91.Google Scholar

Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Joo Hyun Moon
    • 1
  • Soyeong Lee
    • 1
  • Jee Min Park
    • 1
  • Jungho Lee
    • 2
  • Daejoong Kim
    • 3
  • Seong Hyuk Lee
    • 1
  1. 1.School of Mechanical EngineeringChung-Ang UniversitySeoulKorea
  2. 2.Dept. of Energy Conversion SystemsKorea Institute of Machinery & MaterialsDaejeonKorea
  3. 3.Dept. of Mechanical EngineeringSogang UniversitySeoulKorea

Personalised recommendations