EXPERIMENTS WITH A SUPERSONIC TUBE WIND-TUNNEL

Abstract

An experimental study was performed of the unsteady processes in the starting period of a supersonic Ludwieg tube, a device which operates like an intermittent supersonic wind tunnel. A quick opening diaphragm located downstream of the nozzle initiates the flow. Pressure and density measurements are made in a variety of ways in Mach number 1.67 and 3.0 nozzles. For the starting conditions treated, supersonic flow is established in the nozzle without producing shock waves. Various time dependent functions are observed in the adjustment of gas-dynamic parameters to their steady supersonic values. These changes of pressure, et., include undershoots, overshoots, and other variations of the final steady-state values. Calculations based on an assumed zero-length nozzle do not adequately predict starting times and pressures.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1970
Accession Number
AD0702806

Entities

People

  • Dominic Cagliostro
  • Joseph A. Johnson Iii

Organizations

  • Yale University

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Air Force
  • Boundary Layer
  • Cameras
  • High Pressure
  • Interferometers
  • Light Sources
  • Mach Number
  • Mach Zehnder Interferometers
  • Measurement
  • Motion Picture Cameras
  • Pressure Gages
  • Pressure Measurement
  • Pressure Transducers
  • Reynolds Number
  • Shock Waves
  • Turbulent Mixing
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Computational Modeling and Simulation
  • Fluid Dynamics.

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Flow