Accession Number : ADA264174


Title :   Pulse Mitigation and Heat Transfer Enhancement Techniques. Volume 2. Effect of Surface Wettability and Roughness in Evaporative Spray Cooling


Descriptive Note : Final rept. 1 Jul 87-31 Jul 92,


Corporate Author : KENTUCKY UNIV LEXINGTON DEPT OF MECHANICAL ENGINEERING


Personal Author(s) : Chow, L C ; Sehmbey, M S ; Pais, M R


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a264174.pdf


Report Date : Aug 1992


Pagination or Media Count : 141


Abstract : In the spray cooling of a heat surface, variations in the surface contact angle cause a change in nucleation characteristics and thereby influence the heat transfer process. The surface roughness variations affect the thickness of the liquid film formed by the spray; this has a profound effect on the heat transfer from the surface. The effect of these two parameters is studied experimentally under different spray conditions involving an air atomizing nozzle.


Descriptors :   *HEAT TRANSFER , *COOLING , *WETTING , *FILM COOLING , ANGLES , THICKNESS , SPACECRAFT , AIRCRAFT , VAPOR PHASES , PULSES , LIQUID COOLING , SPRAYS , THERMOCOUPLES , HEAT FLUX , HEAT , EVAPORATION , NOZZLES , LIQUID PHASES , FLOW RATE , SURFACES , LIQUIDS , SURFACE ROUGHNESS , FILMS , ELECTRONIC EQUIPMENT , NUCLEATION


Subject Categories : Air Condition, Heating, Lighting & Ventilating
      Thermodynamics


Distribution Statement : APPROVED FOR PUBLIC RELEASE