Characteristics of transient heat transfer during quenching of a vertical hot surface with a falling liquid film |
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| Authors: | Hiroaki Matsueda Masanori Monde Shoichi Matsuda |
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| Affiliation: | 1. Department of Mechanical Engineering, Saga University, Japan;2. Department of Mechanical Engineering, Okinawa National College of Technology, Japan |
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| 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 |
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| Keywords: | quenching two‐dimensional inverse solution maximum heat flux transient cooling falling film |
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