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http://dx.doi.org/10.3795/KSME-B.2014.38.12.1051

Numerical Analysis of Simultaneous Cooling Process of Upper and Lower Side of Running Hot Steel Strip  

Kwon, Myeon Jae (School of Mechanical Engineering, Kyungpook Nat'l Univ.)
Park, Il Seouk (School of Mechanical Engineering, Kyungpook Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.38, no.12, 2014 , pp. 1051-1056 More about this Journal
Abstract
After hot rolling, a high-temperature steel plate with a temperature higher than $800^{\circ}C$ is rapidly cooled by multiple circular water jets. In this cooling process, because the temperature of the steel plate is much higher than the boiling point of the cooling water, film-boiling heat transfer occurs and a very thin steam layer forms between the plate surface and the cooling water. The steam layer acts as a thermal resistance that prevents heat transfer between the cooling water and the steel plate. In addition to the film-boiling heat transfer, complex physical phenomena such as the free-surface flow of residual water that accumulated on the material and the material's high-speed motion also occur in the cooling process. In this study, the simultaneous cooling process of the upper and lower sides of a running hot steel strip is investigated using a three-dimensional numerical model and the cooling performances and characteristics of the upper-side cooling and lower-side cooling are compared.
Keywords
Film Boiling; Steam Layer; Leidenfrost Effect; Upper Cooling; Lower Cooling;
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  • Reference
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