Journal
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
Volume 53, Issue 23-24, Pages 5027-5034Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2010.07.062
Keywords
Microjet; Jet array; Impingement; Flow boiling
Categories
Funding
- Office of Naval Research (ONR) under the Multidisciplinary University Research Initiative (MURI) [N00014-07-1-0723]
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An experimental study of single-phase and flow boiling heat transfer of a submerged microjet array was conducted with R134a. The staggered array of seventeen 112-mu m diameter orifices impinged onto a 1 x 1-mm heater. Single-phase data were gathered over the range 3050 <= Re-d <= 10,600 with 53.6 <= (Nu(d)) over bar 128. Boiling experiments were conducted with liquid subcoolings of 10, 20, and 30 degrees C at jet velocities of 4, 7, and 10 m/s. Boiling was generally found to enhance heat transfer with a maximum heat flux of 590 W/cm(2). However, temperature excursions occurred at low superheats and were found to be related to non-condensable gas content. (C) 2010 Elsevier Ltd. All rights reserved.
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