Accession Number:

AD0687093

Title:

EXPERIMENTS ON NON-EQUILIBRIUM SUPERSONIC FLOW SHOCK STAND-OFF DISTANCE OF SPHERES CARRIED OUT IN A NEW TYPE OF INTERMITTENT WIND TUNNEL

Descriptive Note:

Final rept. 1 Jul 1965-31 Dec 1966

Corporate Author:

YALE UNIV NEW HAVEN CT DEPT OF ENGINEERING AND APPLIED SCIENCE

Personal Author(s):

Report Date:

1969-05-01

Pagination or Media Count:

111.0

Abstract:

An experimental investigation of the non-equilibrium behavior of the shock stand-off distance ahead of spheres is described. Wind tunnel experiments using a well understood reacting model gas mixture with a single relaxation process are performed. A marked variation of the dimensionless shock stand-off distance as a function of a non-equilibrium parameter patterned after that proposed by Damkohler is observed. Qualitatively, the results are found to be in agreement with theoretical predictions in the literature. A new application of the Ludwieg tube intermittent supersonic wind tunnel to the study of non- equilibrium flow is presented in the process of this work. The behavior of the intermittent tunnel as a tool is non-equilibrium flow research is calculated in some detail. Experimental results on the facility performance are included for comparison.

Subject Categories:

  • Aerodynamics
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE