PRELIMINARY ESTIMATES OF THE TEST-SECTION CHARACTERISTICS IN A HIGH-ENTHALPY, LOW-DENSITY WIND TUNNEL,

Abstract

Preliminary estimates are obtained of the testsection characteristics in a high-enthalpy, lowdensity wind tunnel. The initial stagnation conditions are assumed to be a temperature of 900 R and atmospheric pressure; the steady, onedimensional, inviscid, adiabatic expansion is terminated at 0.00001 atmosphere. Air is used as the working medium. The computations are performed for both equilibrium and frozen flow processes, thus enabling a physical appreciation for the comparative behavior of the two extremes which serve as upper and lower limits on any nonequilibrium behavior. The variables that are evaluated include the significant physical, thermodynamic, and transport properties, in addition to some of the more important dimensionless aerodynamic similarity parameters, all of which are presented graphically as a function of nozzle static pressure. It is demonstrated that the test-section characteristics depend to a considerable degree on the governing flow process. (Author)

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1964
Accession Number
AD0455149

Entities

People

  • John R. Krouse

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Atmospheres
  • Barometric Pressure
  • Computations
  • Enthalpy
  • Low Density
  • Physical Properties
  • Static Pressure
  • Transport Properties
  • Transport Ships
  • Wind Tunnels

Readers

  • Fluid Dynamics.
  • Plasma Physics / Magnetohydrodynamics
  • Systems Analysis and Design