The Heat Transfer and Fluid Dynamics of Concave Surface Curvature.

Abstract

The overall goal of this project is study convective heat transfer and fluid-mechanics in a concavely curved turbulent boundary layer. The objective is to identify the mechanisms whereby concavity increases surface heat transfer. Progress during the past year has centered on the recently added goal of studying the combined effects of moderate levels of grid-generated turbulence and concave curvature. Overall results from the fluid-mechanics section of the project are that grid-generated turbulence increases the skin friction, but does not alter the near-wall mean velocity scaling or the near-wall levels of the velocity fluctuations. The heat transfer measurements are showing that the Stanton number is increased by the grid-generated turbulence with the combined effects of curvature and the additional turbulence producing the largest increase. Keywords: Heat transfer, Turbulent boundary layers, Adaptive grids.

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Document Details

Document Type
Technical Report
Publication Date
Mar 10, 1988
Accession Number
ADA193064

Entities

People

  • J. P. Johnston
  • R. J. Moffat

Organizations

  • Stanford University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundaries
  • Boundary Layer
  • Classification
  • Curvature
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Mechanics
  • Friction
  • Heat Transfer
  • Heat Transfer Coefficients
  • Layers
  • Measurement
  • Mechanics
  • Skin Friction
  • Turbulence
  • Turbulent Boundary Layer
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Fluid Mechanics and Fluid Dynamics.