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):
Report Date:
1968-12-01
Pagination or Media Count:
71.0
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:
Subject Categories:
- Aerodynamics
- Fluid Mechanics