Accession Number : AD0642281

Title :   HEAT TRANSFER STUDIES OF WATER-SPRAY FLOWS,

Corporate Author : NORTHERN RESEARCH AND ENGINEERING CORP CAMBRIDGE MASS

Personal Author(s) : Smith,J. E.

Report Date : MAY 1966

Pagination or Media Count : 116

Abstract : An experimental investigation into the heat-transfer characteristics of two-component, two-phase flows about a cylinder is described. Heat-transfer coefficients were measured at various positions around the periphery of the cylinder with systematic variations of cooling stream velocity, droplet size, and liquid-gas mass-ratio. The two-component cooling stream was a mixture of water droplets in air. An analysis of the heat-transfer characteristics over the front half of the cylinder, where the bulk of the heat transfer takes place, has been carried out for a simplified model. In this model, the air is assumed to be incompressible, and bouncing of droplets from the surface of the cylinder has been ignored. It has been found that this analysis gives some valuable insight into the relative importance of the various mechanisms which contribute to the over-all heat transfer. Both the experimental and the analytical results show that, in general, significant increases in heat transfer are obtained over that which would be obtained from a single-component gaseous cooling fluid. (Author)

Descriptors :   (*HEAT TRANSFER, *TWO PHASE FLOW), WATER INJECTION, SPRAYS, CYLINDRICAL BODIES

Subject Categories : Fluid Mechanics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE