Accession Number : AD0689567
Title : FEASIBILITY OF SLIP VELOCITY MEASUREMENT USING DOPPLER TECHNIQUE IN ARGON.
Descriptive Note : Scientific rept.,
Corporate Author : UNIVERSITY OF SOUTHERN CALIFORNIA LOS ANGELES DEPT OF AEROSPACE ENGINEERING
Personal Author(s) : Sloat,Timothy Norman ; Scott,Paul B.
Report Date : DEC 1968
Pagination or Media Count : 71
Abstract : The feasibility of measuring slip velocities by observing the Doppler shift in electron beam excited radiation is investigated. The expected Doppler shift in the 4277 A line of argon gas is 0.00276 A. Line broadening effects are dominated by Doppler broadening, which at flow conditions near the leading edge, results in a half-intensity width of 0.00146 A. Using a Fabry-Perot interferometer, the line shift and Doppler profiles are readily resolved near the leading edge. A few suggestions are made for increasing the signal level, including crossing the electron beam with an argon ion laser beam. (Author)
Descriptors : (*NOZZLE GAS FLOW, RAREFIED GAS DYNAMICS), PITOT TUBES, DOPPLER EFFECT, ARGON, ELECTRON BEAMS, BOUNDARY LAYER
Subject Categories : Aerodynamics
Distribution Statement : APPROVED FOR PUBLIC RELEASE