Study for influence of frequency characteristic of turbulent velocity fluctuation upon flowaccelerated corrosion

Abstract

A cooling system utilizing a swirling flow generated downstream of a multi-elbow piping instead of the swirl tube has been proposed to for the ITER divertor cooling, on which an extremely high heat flux more than 10 MW/m² is supposed to impose. In this study, a visualization experiment to research the strength of swirling flow, its continuity and the turbulence statics and a heat transfer experiment under one-sided heating condition are conducted to evaluate the applicability. As a result, heat removal performance until approximately 5 MW/m² was observed although the critical heat flux wasn’t confirmed.