Heat treatment of thin sheets, research methodology to design a cooling system

Abstract

This paper describes experimental stages of a cooling system designing procedure in laboratory conditions of vertically and horizontally moving surfaces. First stage of the experimental research is focused on a study of a water flow distribution and impact pressure using laboratory equipment and software. Water distribution and impact measurement tests are used for verification of catalogue data provided by nozzle producer so thus an input information to the theoretical water distribution visualization software. Second stage of the experimental research are dynamic tests to describe an influence of several parameters (water flow rate, pressure, nozzle position etc.) on the cooling capability and mainly on the cooling homogeneity. Heat transfer coefficient dependence on a surface temperature and position obtained from these results and used as a boundary condition for simulating real cooling process with real material and thickness. Verification and characterization of the final cooling system could be done using Carousel stand when the linear movement is transferred to a rotation and it enables to simulate very long cooling zones. Examples of the thin sheets cooling and influence of several parameters on the cooling intensity are given in this paper.