An experimental study of jet impingement boiling is presented for water under saturated and subcooled conditions. Unique to this study is the documentation of boiling curves of a submerged water jet under subatmospheric conditions. Data are reported at a fixed nondimensional nozzle-to-surface distance of H/dj = 6 and for a fixed surface-to-nozzle diameter ratio, dsurf/dj, of 23.8. Saturated jet impingement experiments are performed at three subatmospheric pool pressures of 0.176 bar, 0.276 bar, and 0.478 bar with corresponding saturation temperatures of 57.3 °C, 67.2 °C, and 80.2 °C. At each pressure, jet impingement boiling at varying Reynolds numbers are characterized and compared with pool boiling heat transfer. The effect of surface roughness and fluid subcooling is studied at the lowest pressure of 0.176 bar. Boiling curves indicate a strong dependence of heat flux on jet Reynolds number in the partially developed nucleate boiling region but only a weak dependence in the fully developed nucleate boiling region. At a fixed wall superheat, fluid subcooling is found to shift the boiling curve to the left thereby enhancing heat transfer performance. Critical heat flux is found to increase with increases in pressure, surface roughness, and Reynolds number.
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e-mail: vinod.narayanan@oregonstate.edu
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Heat Transfer In Nanochannels, Microchannels, And Minichannels
Submerged Jet Impingement Boiling of Water Under Subatmospheric Conditions
Ruander Cardenas,
Ruander Cardenas
School of Mechanical, Industrial, and Manufacturing Engineering,
Oregon State University
, Corvallis, OR 97331-6001
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Vinod Narayanan
Vinod Narayanan
School of Mechanical, Industrial, and Manufacturing Engineering,
e-mail: vinod.narayanan@oregonstate.edu
Oregon State University
, Corvallis, OR 97331-6001
Search for other works by this author on:
Ruander Cardenas
School of Mechanical, Industrial, and Manufacturing Engineering,
Oregon State University
, Corvallis, OR 97331-6001
Vinod Narayanan
School of Mechanical, Industrial, and Manufacturing Engineering,
Oregon State University
, Corvallis, OR 97331-6001 e-mail: vinod.narayanan@oregonstate.edu
J. Heat Transfer. Feb 2012, 134(2): 020909 (8 pages)
Published Online: December 19, 2011
Article history
Received:
January 11, 2011
Revised:
July 15, 2011
Online:
December 19, 2011
Published:
December 19, 2011
Citation
Cardenas , R., and Narayanan, V. (December 19, 2011). "Submerged Jet Impingement Boiling of Water Under Subatmospheric Conditions." ASME. J. Heat Transfer. February 2012; 134(2): 020909. https://doi.org/10.1115/1.4005064
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