The Use of Shaped Cavities to Improve the Sidewall Boundary Layer Quality in Gas Dynamic Lasers

Abstract

A series of cavity shapes was tested on the sidewall of a Mach 3 high Reynolds number wind tunnel to determine the effects of the cavity and its downstream lip shape on the external flow. Various mass injection rates into the cavity were provided. Holographic interferommetry, oil flow, and a fast response surface pressure transducer were used to take data. Results indicate that a rectangular cavity with a lip shaped as a short rounded overhang least disturbs the turbulent boundary layer. Low levels of mass injection were found to have little effect on boundary layer quality.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1975
Accession Number
ADA010619

Entities

People

  • James R. Cooper
  • James S. Petty
  • Robert H. Korkegi

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Air Force
  • Blooming
  • Boundary Layer
  • Diffusers
  • Gas Dynamic Lasers
  • Governments
  • Lasers
  • Layers
  • Mass Flow
  • Procurement
  • Shape
  • Shock
  • Shoulder
  • Thermal Blooming
  • Three Dimensional
  • Turbulent Boundary Layer
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Marine Propulsion Engineering and Naval Architecture

Technology Areas

  • Directed Energy