Surface temperatures due to transient heat flow

Abstract

The purpose of this investigation was the determination of the temperature-time history of a metal surface suddenly exposed to high pressure steam.

The purpose of this investigation was the determination of the temperature-time history of a metal surface suddenly exposed to high pressure steam. In the literature dealing with the phenomenon of thermal shock, in order to obtain calculated results, authors have had to assume either; (l) the temperature rise at the surface of the metal was a stepwise function or, (2) the heat transfer coefficient remained constant and the surface temperature was then calculated. To the best of the authors knowledge, all experimental attempts to determine surface temperature as a function of time due to the sudden admission of high pressure steam into piping systems have been performed using static measuring devices. In one report (l) of such an attempt the first recorded point was five seconds after the admission of the steam. It was the authors desire to measure the temperature-time history of the surface of a metal plate exposed to high pressure steam using automatic continuous recording devices, with particular attention being paid to approximately the first five seconds after the first contact between steam and metal surfaces.