Accession Number : AD0604252

Title :   DIRECT MEASUREMENT OF VELOCITY DISTRIBUTION FUNCTIONS.

Corporate Author : GENERAL ELECTRIC CO PHILADELPHIA PA MISSILE AND SPACE DIV

Personal Author(s) : Muntz,E. P.

Report Date : AUG 1964

Pagination or Media Count : 62

Abstract : A method for measuring velocity distribution functions in rarefied gas flows was investigated. The technique is a direct determination, accurate to within one percent, which does not significantly disturb the flow under investigation. It is shown that accurate measurements can be made of the Doppler profile of emission lines excited by an electron beam. The method depends upon the tendency of high energy electrons to transfer relatively little momentum to the nuclei when they excite the electronic levels of gas molecules. The technique presented could be used in the study of normal shock waves and other investigations in rarefied gas dynamics research. (Author)

Descriptors :   (*RAREFIED GAS DYNAMICS, VELOCITY), (*STATISTICAL FUNCTIONS, MEASUREMENT), GAS FLOW, MOLECULAR PROPERTIES, ELECTRONS, EXCITATION, SPECTROSCOPY, DOPPLER EFFECT

Distribution Statement : APPROVED FOR PUBLIC RELEASE