Enhancement of Chamber Wall Heat Transfer by Surface Contouring (POSTPRINT)

Abstract

The effect of surface features on chamber wall heat transfer has been measured in a sub-scale combustion chamber. Results are reported for five different roughness patterns for conditions of hydrogen/oxygen combustion at mixture ratios of 2-6 and chamber pressures of 100-200 psig. The results include the measured levels of heat flux and Stanton number. The transverse ribs and grooves had the largest effect, resulting in approximately a doubling of the heat flux relative to a smooth plate, and the increase in Stanton number agreed well with a correlation based on skin-friction.

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Document Details

Document Type
Technical Report
Publication Date
Oct 18, 2005
Accession Number
ADA444781

Entities

People

  • E. Coy
  • J. Poylio
  • Jeremy Watts
  • Stephen Danczyk

Tags

Communities of Interest

  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force Research Laboratories
  • Boundary Layer
  • Chambers
  • Combustion
  • Combustion Chambers
  • Elements
  • Engines
  • Heat Flux
  • Heat Transfer
  • Hydrogen
  • Materials
  • Measurement
  • Propulsion Systems
  • Roughness
  • Surface Temperature
  • Thermal Conductivity
  • Thermal Diffusivity

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Rocket Propulsion.
  • Thermal Physics or Thermal Science.