Library Subscription: Guest

ISSN Online: 2377-424X

International Heat Transfer Conference 5
September, 3-7, 1974, Tokyo, Japan

LEIDENFROST TEMPERATURE AND HEAT-TRANSFER COEFFICIENTS FOR WATER SPRAYS IMPINGING ON A HOT SURFACE

Get access (open in a dialog) DOI: 10.1615/IHTC5.350
pages 135-138

Abstract

An experimental study has been made on the heat transfer from a high-temperature surface, initially heated to 970°C to a jet of water droplets with mean diameters from 0.1 - 1 mm and velocities from 10-30 m/s. The overall volumetric velocity of the spray was varied by a factor of 40. The results showed two regions of heat-transfer processes, separated by the Leidenfrost temperature. This experimentally found temperature ranged from 350 − 900°C depending on spray variables; mainly overall volumetric velocity. The heat transfer data showed a strong drop interaction effect when compared with single drop data.