Accession Number : ADA257101


Title :   Natural Convection from a Horizontal Heater in Response to Steady and Pulsatile Input Powers


Descriptive Note : Master's thesis


Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA


Personal Author(s) : Hickey, Christopher N


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a257101.pdf


Report Date : Jun 1992


Pagination or Media Count : 83


Abstract : Natural convection heat transfer from a flush mounted heater on a larger horizontal substrate in water has been investigated for both steady and periodic input powers. For steady power conditions, the heat flux was varied from 222 to 6880 W/m 2. Heater surface temperatures were measured at several locations in order to develop a non-dimensional heat transfer correlation. Three types of periodic input powers were tested: a triangular wave, an approximate square wave, and a sinusoidal wave. Mean, amplitude, and frequency were varied for each wave. Temperature measurements at selected heater locations were compared with steady state conditions to determine heat transfer enhancement.


Descriptors :   *HEAT TRANSFER , *ELECTRONIC EQUIPMENT , *LIQUID COOLING , FREQUENCY , INPUT , STEADY STATE , MEASUREMENT , CONVECTION , MASS TRANSFER , POWER , SQUARE WAVES , HEATERS , THERMOCOUPLES , SURFACE TEMPERATURE , AMPLITUDE , HEAT FLUX , HEAT , MEAN , POWER SUPPLIES , SUBSTRATES , THESES , TEMPERATURE , COMPUTERS , WATER , AUGMENTATION


Subject Categories : Electrical and Electronic Equipment
      Air Condition, Heating, Lighting & Ventilating
      Thermodynamics


Distribution Statement : APPROVED FOR PUBLIC RELEASE