EXPERIMENTS ON FREE AND IMPINGING UNDEREXPANDED JETS FROM A CONVERGENT NOZZLE

Abstract

Experiments were performed in which the velocity profiles and decay and spreading properties of free underexpanded jets of cold air were measured. Stagnation point heat transfer parameters for impingement of these jets on various surface shapes were evaluated and correlations made with the free jet data. Pressure distribution and photographic studies of the free and impinging jets revealed that an unusual separated flow phenomenon can exist under certain impingement conditions. Problems associated with changes in jet stability and the effects of interference due to geometric arrangement of the apparatus were considered in a qualitative way.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1964
Accession Number
AD0461622

Entities

People

  • Coleman Dup. Donaldson
  • Richard S. Snedeker

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Computational Fluid Dynamics
  • Flow Fields
  • Flow Visualization
  • Fluid Dynamics
  • Ground Effect
  • Heat Transfer
  • Mach Number
  • Measurement
  • Pressure Distribution
  • Pressure Gradients
  • Pressure Measurement
  • Radial Velocity
  • Rocket Exhaust
  • Short Takeoff Aircraft
  • Stagnation Point
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Combustion and Flow Dynamics.