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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/11187
Title: Determination of rewetting velocity during jet impingement cooling of a hot surface
Authors: Agrawal C.
Kumar R.
Gupta, Akhilesh Kumar
Chatterjee B.
Published in: Journal of Thermal Science and Engineering Applications
Abstract: An experimental investigation has been carried out to study the cooling of a hot horizontal stainless steel surface of 0.25 mm thickness, which has 800 ± 10°C initial temperature. A round water jet of 22 ± 1°C temperature was injected over the hot surface through a straight tubes type nozzle of 2.5mm diameter and 250mm length. The experiments were performed for the jet exit to target surface spacing in a range of 4-16 times of jet diameter and jet Reynolds number in a range of 5000-24,000. The rewetting velocity during transient cooling of hot surface was determined with the help of time variant surface temperature data and with the captured thermal images of the hot surface as well. The effect of Reynolds number, Re, jet exit to surface spacing, z/d, on the rewetting velocity has been determined for the different downstream spatial locations. A correlation has also been developed to determine the rewetting velocity, which predicts 75% of experimental data within an error band of ± 10%. © 2013 by ASME.
Citation: Journal of Thermal Science and Engineering Applications (2013), 5(1): -
URI: https://doi.org/10.1115/1.4007437
http://repository.iitr.ac.in/handle/123456789/11187
Issue Date: 2013
Publisher: American Society of Mechanical Engineers (ASME)
Keywords: Hot surface
Jet impingement
Rewetting velocity
Stagnation Nusselt number
Transient cooling
ISSN: 19485085
Author Scopus IDs: 55224918500
55389796000
55491955100
7201648525
Author Affiliations: Agrawal, C., Department of Mechanical Engineering, College of Technology and Engineering, Maharana Pratap University of Agriculture and Technology, Udaipur, 313001, India
Kumar, R., Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Gupta, A., Department of Mechanical and Industrial Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Chatterjee, B., Reactor Safety Division, Bhabha Atomic Research Centre, Mumbai, 400085, India
Corresponding Author: Kumar, R.; Department of Mechanical and Industrial Engineering, Indian Institute of Technology RoorkeeIndia
Appears in Collections:Journal Publications [ME]

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