PLANAR RAYLEIGH SCATTERING RESULTS IN HELIUM/AIR MIXING EXPERIMENTS IN A MACH 6 WIND TUNNEL by
نویسندگان
چکیده
Planar Rayleigh scattering measurements using an ArF-excimerlaser have been performed to investigate helium mixing into air atsupersonic speeds. The capability of the Rayleigh scattering technique for flowvisualization of a turbulent environment is demonstrated in a large-scale, Mach 6facility. The detection limit obtained with the present setup indicates thatplanar, quantitative measurements of density can be made over a large cross sectionalarea (5 cm by 10 cm) of the flow field in the absence of clusters. https://ntrs.nasa.gov/search.jsp?R=2004012121
منابع مشابه
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 measu...
متن کاملPlanar Rayleigh Scattering Results in Helium / Air Mixing Experiments in a Mach
Planar Rayleigh scattering measurements using an ArF-excimer laser have been 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 measureme...
متن کاملPlanar Rayleigh Scattering Results in Helium/air Mixing
Planar Rayleigh scattering measurements using an ArF-excimerlaser have been performed to investigate helium mixing into air atsupersonic speeds. The capability of the Rayleigh scattering technique for flowvisualization of a turbulent environment is demonstrated in a large-scale, Mach 6facility. The detection limit obtained with the present setup indicates thatplanar, quantitative measurements o...
متن کاملCondensation Effects on Rayleigh Scattering Measurements in a Supersonic Wind Tunnel
Rayleigh and Raman scattering measurements have been performed i n the 20-inch, Mach 6 wind tunnel at the NASA Langley Research Center . Rayleigh results show signal levels which are much higher than expected f o r molecular scattering in the tunnel, while densities deduced from s p o n t a n e o u s Raman scattering of molecular nitrogen are in good agreement with t h e expected nitrogen densi...
متن کاملStudy of Cluster Formation and its Effects on Rayleigh and Raman Scattering Measurements in a Mach 6 Wind Tunnel by
Using a frequency-doubled Nd-YAG pulsed laser and a single-intensified CCD camera, Rayleigh scattering measurements have been performed to study the cluster formation in a Mach 6 wind tunnel at NASA Langley Research Center. These studies were conducted both in the free stream and in a model flow field for various flow conditions to gain an understanding of the dependence of the Rayleigh scatter...
متن کامل