Effects of Variable Properties in Film Cooled Turbulent Boundary Layers.

Abstract

The effects of variable properties on heat transfer in a film-cooled turbulent boundary layer were investigated. A new procedure was developed to deduce adiabatic effectiveness from heat transfer coefficients based on the wall to freestream temperature difference, where both are representative of variable property flow conditions. The new technique was shown to be valid using data from the literature for injection into a turbulent boundary layer from one and two rows of injection holes. From these results, the variation of the coolant to mainstream density ratio was shown to have a significantly greater effect on heat transfer than variations of viscosity and thermal conductivity. Keywords: Gas turbine cooling; Film cooling; Turbulent boundary layers; Variable properties. (Theses)

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1986
Accession Number
ADA167716

Entities

People

  • Alfred F. Walz Jr

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Engineering
  • Equations
  • Film Cooling
  • Fluid Dynamics
  • Fluid Mechanics
  • Gas Turbines
  • Guide Vanes
  • Heat Transfer
  • Heat Transfer Coefficients
  • Layers
  • Mechanical Engineering
  • Mechanical Properties
  • Thermal Conductivity
  • Turbine Blades
  • Turbines
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Fluid Dynamics.