Heat and Mass Transfer

, 46:53 | Cite as

Flow structure and heat transfer of impingement jet

  • K. Oyakawa
  • A. Umeda
  • M. D. IslamEmail author
  • N. Saji
  • S. Matsuda


This paper presents the characteristics of flow behavior and thermal fields of both free and impingement jets issued from circular orifice nozzle at Re = 9,700. The flow behavior of a single round jet and impingement jet were observed by smoke flow visualization recorded by a high speed video camera with 5,000 frames per second. Heat transfer coefficient on the impingement surface was calculated varying the Reynolds number and the separation distance between nozzle exit and plate. Time-series analysis was applied to the visualization image to get the information of time variation of flow behavior. Probability distribution of vortex scale induced by the jet at discrete positions was investigated. Experimental results show that the potential core is not a continuous phenomenon with time and the frequency of vortex ring formation have similar features regardless of whether the impingement plate was set on or not, furthermore the time-series analysis with flow visualization images makes clear the detailed flow behavior.


Vortex Ring Target Plate Impingement Plate High Speed Video Camera Laser Light Sheet 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

List of symbols


Diameter of circular nozzle


Separation distance between a nozzle exit and an impingement plate


Supplied heat flux


Heat transfer coefficient


Reynolds number ≡ UD/ν


Nusselt number ≡ h x D/κ


Distance of radial direction from origin on impingement plate


Nozzle exit temperature


Local wall temperature on impingement plate


Mean velocity at nozzle exit


Vertical direction coordinates from nozzle exit

Greek symbols


Thermal conductivity of fluid


Kinematic viscosity of fluid



This is to acknowledge that this paper is not considered for publishing in any other journal.


  1. 1.
    Oyakawa K, Hanashiro K, Matsuda S, Yaga M, Hiwada M (2005) Study on flow and heat transfer of multiple impingement jets. Heat Transf Asian Res 34(6):419–431CrossRefGoogle Scholar
  2. 2.
    Hiwada M, Mimatsu J, Kanamori A, Oyakawa K (2006) Fluid flow behavior and impingement heat transfer by triangular orifice jet. In: CD ROM Proceedings of the 12th international symposium on flow visualization, German Aerospace Center (DLR), Gottingen, Germany, September 10–14Google Scholar
  3. 3.
    Oyakawa K, Yaga M, Nasu K, Senaha I, Matsuda S, Azama T (1998) Impingement heat transfer by jet issuing from a cross-shaped nozzle. Heat Transf Jpn Res 27(3):192–204CrossRefGoogle Scholar
  4. 4.
    Yule AJ (1978) Large-scale structure in the mixing layer of a round jet. J Fluid Mech 89:413–432CrossRefGoogle Scholar
  5. 5.
    Kataoka K, Suguro M, Degawa H, Mihata I (1987) The effect of surface renewal due to large-scale eddies on jet impingement heat transfer. Int J Heat Mass Transf 30(3):559–567CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • K. Oyakawa
    • 1
  • A. Umeda
    • 1
  • M. D. Islam
    • 2
    Email author
  • N. Saji
    • 1
  • S. Matsuda
    • 1
  1. 1.Department of Mechanical Systems Engineering, Faculty of EngineeringUniversity of the RyukyusNishiharaJapan
  2. 2.Department of Mechanical EngineeringThe Petroleum InstituteAbu DhabiUnited Arab Emirates

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