Accession Number : AD0726532

Title :   An Experimental Investigation of a Nonequilibrium Corner-Expansion Flow of Ionized Argon,

Corporate Author : TORONTO UNIV (ONTARIO) INST FOR AEROSPACE STUDIES

Personal Author(s) : Igra,Ozer

Report Date : DEC 1970

Pagination or Media Count : 131

Abstract : Experiments using a 15-degree corner-expansion flow of ionized argon, induced by a normal shock wave in a 4 in x 7 in hypervelocity shock tube, have yielded values of the recombination rate constant as a function of temperature and the variation of the plasma flow quantities with distance from the corner. The data were obtained by using mainly a Mach-Zehnder interferometer which had a nine inch diameter field of view. The interferometer had a dual frequency laser light source and was driven by either a ruby or neodymium rod. The theoretically predicted values for three-body, electron-ion-electron collisional recombination rate are in good agreement with those measured gasdynamically in a well defined flow. The measured flow quantities substantiate a previous analysis based on the method of characteristics. (Author)

Descriptors :   (*GAS IONIZATION, HYPERSONIC CHARACTERISTICS), (*PLASMAS(PHYSICS), FLOW FIELDS), ARGON, SHOCK TUBES, THERMAL PROPERTIES, PRESSURE, ELECTRONS, TEST METHODS, MODEL TESTS, THEORY, CORRELATION TECHNIQUES

Subject Categories : Fluid Mechanics
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE