Effects of an Embedded Vortex on a Single Eilm-Cooling Jet in a Turbulent Boundary Layer

Abstract

Effects of embedded longitudinal vortices on heat transfer in a turbulent boundary layer film cooled from a single injections hole are discussed. Film coolant was injected at blowing ratios 0.50 to 1.50 at a freestream velocity of 10 m/s. A single longitudinal vortex was induced upstream of the film-cooling holes. Heat transfer measurement were made downstream of injection. Flow visualization tests were conducted after the injectant was contaminated with smoke. Surveys of mean velocity and mean temperature were also made in different spanwise normal planes. For all blowing ratios examined, the embedded vortices cause significant alterations to wall heat transfer and to film-cooling distributions. Embedded vortex, Film-cooling single jet, Heat transfer, Endwall secondary flows.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1988
Accession Number
ADA207374

Entities

People

  • Warren W. Williams

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Boundary Layer
  • Coordinate Systems
  • Engineering
  • Flow Fields
  • Flow Visualization
  • Fluid Mechanics
  • Generators
  • Heat Transfer
  • Layers
  • Measurement
  • Mechanical Engineering
  • Secondary Flow
  • Stratified Fluids
  • Turbines
  • Turbulent Boundary Layer
  • Vortex Generators
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.
  • Fluid Mechanics and Fluid Dynamics.