Accession Number:

ADA242702

Title:

Natural Convection Immersion Cooling of an Array of Heated Protrusions in an Enclosure Filled with Dielectric Liquid: Effects of Enclosure Width and Fluid Prandtl Number

Descriptive Note:

Master's thesis,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s):

Report Date:

1991-03-01

Pagination or Media Count:

174.0

Abstract:

An experimental investigation of natural convection immersion cooling of an array 3 by 3 horizontally-placed heated discrete protrusions in an enclosure filled with dielectric fluids has been conducted. Each rectangular protrusion simulates a 20 pin dual-inline-package. Effects of enclosure width and fluid Prandtl number were examined. Five different spacings from 42 mm to 7 mm and two dielectric fluids, FC-75 Pr25 at 27 C and FC-43 Pr82 at 27 C were used. The top boundary of the enclosure was kept constant at 10 C and the bottom boundary was insulated during the experiments. Power dissipation levels per component ranged from 0.115 W to 2.9 W. Component surface temperature measurements were used to obtain the nondimensional heat transfer parameters. In the case of FC-75 and 30 and 7 mm spacings, and in the case of FC-43 and 7 mm spacing, timewise fluctuations of temperature at steady state in several locations were recorded with increasing power level.

Subject Categories:

  • Electricity and Magnetism
  • Fluid Mechanics
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE