Heat Removal Augmentation in Steam Generating Channels with Swirled and Transit Flows

Abstract

The paper presents the results of investigations of the effect of flow swirling and of the combined effect of swirling and transit flow on the heat removal rate and critical heat flux (CHF) in steam generating channels of annular type. It is established that a significant reduction in CHF and in the rate of heat removal occurs on convex heat transfer surfaces. Using swirled and transit flows allows one to considerably enhance the heat removal rate and CHF on convex heat transfer surfaces. Pressure losses and heat removal rate are shown to be dependent on the swirled-to-transit flow ratio. With an optimal relation between these flows it is possible to develop and construct highly efficient steam generating devices in which pressure losses differ only slightly from those in smooth channels.