Accession Number : AD0612574

Title :   TEMPERATURE MEASUREMENTS FOR POWDERED SOLIDS IN REFLECTED SHOCK WAVES.

Descriptive Note : Revised ed.,

Corporate Author : HARVARD COLL OBSERVATORY CAMBRIDGE MASS

Personal Author(s) : Parkinson,W. H. ; Reeves,E. M.

Report Date : 30 APR 1964

Pagination or Media Count : 14

Abstract : Measurements have been made to determinne the temperature behind reflected shock waves from an aerodynamic shock in argon containing a sample of powdered material. Time-resolved temperatures were measured photoelectrically by the brightness-emissivity method which employs a short duration flash tube. The measured temperatures were consistent, and about 10% lower than the calculated temperature for pure argon, over a 9 eV range of atomic excitation energies, indicating that thermodynamic equilibrium has been achieved. Calculated and measured densities for the atoms of the powder indicate that approximately 40% of the sample was uniformly distributed behind the reflected shock wave. (Author)

Descriptors :   (*TEST METHODS, TEMPERATURE), (*SHOCK TUBES, SPECTROSCOPY), (*SHOCK WAVES, TEMPERATURE), (*POWDERS, SHOCK TUBES), MEASUREMENT, GASES, ARGON, CALCIUM COMPOUNDS, ALUMINUM COMPOUNDS, SULFIDES, ATOMIC ENERGY LEVELS, EXCITATION, VAPORIZATION, EMISSIVITY, ASTROPHYSICS

Distribution Statement : APPROVED FOR PUBLIC RELEASE