The Effects of Orientation and Elevated Acceleration on the Cooling Performance of a Centrifuge-Mounted Spray Cooling System

Abstract

A two-nozzle spray cooling system (R-134a) was installed on an 8-foot-diameter centrifuge table to test the effects of elevated acceleration on steady state cooling performance. Acceleration effects were evaluated in four orientations relative to the acceleration vector, which ranged from 1-10 g's. The 2-cm2 heated surface removed heat fluxes up to 250 W/cm2 in all test cases, and small performance improvements were seen at high accelerations in certain orientations. Additionally, the vertical spraying upward and horizontal spraying orientations demonstrated improved cooling over the nominal downward spraying orientation, with a decreasing effect as radial acceleration increased.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2010
Accession Number
ADA540361

Entities

People

  • Levi J. Elston

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Acquisition
  • Air Force
  • Air Force Research Laboratories
  • Centrifuges
  • Data Acquisition
  • Environment
  • Heat Flux
  • Heat Transfer
  • High Acceleration
  • Hypervelocity Flow
  • Measurement
  • Orientation (Direction)
  • Power Supplies
  • Pressure Transducers
  • Steady State
  • Test Facilities

Readers

  • Combustion and Flow Dynamics.
  • Explosive Engineering.
  • Materials Science and Engineering.