Characteristics of transient heat transfer during quenching of a vertical hot surface with a falling liquid film

✍ Scribed by Hiroaki Matsueda; Masanori Monde; Shoichi Matsuda

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 1011 KB
• Volume: 36
• Category: Article
• ISSN: 1099-2871
• DOI: 10.1002/htj.20167

✦ Synopsis

Abstract

An experimental study has been conducted to elucidate characteristics of transient heat transfer during quenching of a vertical hot surface with a falling liquid film. The experiment was done at atmospheric pressure for the following conditions: an initial surface temperature from 200 to 400^°^C, a subcooling of 20– 80 K, average velocity of 0.52– 1.24 m/s, and the block material is copper and carbon steel. The surface temperature and heat flux are estimated from the measured temperatures in the block during the quench by a two‐dimensional inverse solution. It follows that as the position of wetting advances downward, the position at which the heat flux becomes a maximum also advances downward. The time at which the position of maximum heat flux begins to move is one of the most important parameters and can be predicted by a proposed correlation. In addition, it is revealed that the maximum heat flux for copper depends on the length to which it occurs from the leading edge. © 2007 Wiley Periodicals, Inc. Heat Trans Asian Res, 36(6): 345– 360, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/htj.20167