RESULTS OF AN EXPERIMENTAL INVESTIGATION OF THE PERFORMANCE OF AN EXPANSION TUBE

Abstract

The results from an experimental study of an expansion tube conducted at the von Karman Gas Dynamics Facility (VKF) are presented and discussed. The research was conducted in two facilities: (1) a 6.75-in.-diam Modified Expansion Tube (MET) which utilizes a partially steady and partially unsteady expansion process, and (2) a 4-in.-diam (constant diameter) High Density Shock Tube (HDST) operated in an expansion tube mode for a completely unsteady expansion of the shock-heated gas to the final test condition. Flow velocities from approximately 9000 to 16,000 ft/sec were studied. The theoretical performance of expansion tubes in terms of velocity is found to be nearly obtained; however, the steadiness of the resulting flow leaves much to be desired, and the definition of accurate flow conditions remains in serious doubt.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1966
Accession Number
AD0628628

Entities

People

  • Glenn D. Norfleet
  • Jack D. Whitfield
  • John J. Lacey Jr.

Organizations

  • Arnold Engineering Development Complex

Tags

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Aluminum Foil
  • Boundary Layer
  • Contracts
  • Diameters
  • Fluid Dynamics
  • High Density
  • High Pressure
  • Instrumentation
  • Mach Number
  • Measurement
  • Pressure Measurement
  • Pressure Transducers
  • Shock Tubes
  • Static Pressure
  • Tubes

Fields of Study

  • Physics

Readers

  • Aerosol Science/Aerosol Physics
  • Fluid Dynamics.
  • Systems Analysis and Design