Planar Rayleigh scattering results in helium-air mixing experiments in a Mach-6 wind tunnel.
Planar Rayleigh scattering measurements with an argon-fluoride excimer laser are performed to investigate helium mixing into air at supersonic speeds. The capability of the Rayleigh scattering technique for flow visualization of a turbulent environment is demonstrated in a large-scale, Mach-6 facility. The detection limit obtained with the present setup indicates that planar, quantitative measurements of density can be made over a large cross-sectional area (5 cm x 10 cm) of the flow field in the absence of clusters.
Shirinzadeh
B
B
Hillard
M E
ME
Balla
R J
RJ
Waitz
I A
IA
Anders
J B
JB
Exton
R J
RJ