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Supersonic Two Phase Impinging Jet Heat Transfer

[+] Author Affiliations
Richard R. Parker, James F. Klausner, Renwei Mei

University of Florida, Gainesville, FL

Paper No. IHTC14-22836, pp. 647-655; 9 pages
  • 2010 14th International Heat Transfer Conference
  • 2010 14th International Heat Transfer Conference, Volume 5
  • Washington, DC, USA, August 8–13, 2010
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 978-0-7918-4940-8 | eISBN: 978-0-7918-3879-2
  • Copyright © 2010 by ASME


The experimental heat transfer rates from a supersonic two-phase impinging air jet with disperse droplets is presented. The experimental configuration consists of an expanding disperse mixture of air and water through a converging-diverging nozzle, designed for Mach 3.26 with a liquid to air mass flow ratio ranging from 1.28 to 3.83%, impinging upon a thin film heater constructed of nichrome. The spatially varying heat transfer coefficient was measured, and peak values are on the order of 200,000 W/m2 − K. Two distinct regions of heat transfer are identified, one dominated by the jet impingement flow and another dominated by thin film heat transfer. The heat transfer coefficient of an impinging jet with dry air and no droplets was measured during the investigation as well. The heat transfer results are compared, and it is demonstrated that the addition of disperse water droplets to the jet significantly increases the heat removal capability of the jet as well as smoothing the spatial temperature distribution of the heater surface. As much as a ten fold increase in heat transfer rate is observed. These results demonstrate the usefulness of supersonic two-phase jets for high heat flux thermal management applications.

Copyright © 2010 by ASME
Topics: Heat transfer



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