NDLI: Study of cluster formation and its effects on rayleigh and raman scattering measurements in a mach 6 wind tunnel

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Study of cluster formation and its effects on rayleigh and raman scattering measurements in a mach 6 wind tunnel

Content Provider	NASA Technical Reports Server (NTRS)
Author	Blair, A. B. Exton, R. J. Shirinzadeh, B. Hillard, M. E.
Copyright Year	1991
Description	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 scattering (by clusters) on the local pressures and temperatures in the facility. Using the same laser system, we have also performed simultaneous measurements of the local temperature using the rotational Raman scattering of molecular nitrogen and determined the densities of molecular oxygen and nitrogen by using the vibrational Raman scattering from these species. Quantitative results will be presented in detail with emphasis on the applicability of the Rayleigh scattering for obtaining quantitative measurements of molecular densities both in the free stream and in the model flow field.
File Size	47599
Page Count	9
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20040121016
Archival Resource Key	ark:/13960/t9m37qw2v
Language	English
Publisher Date	1991-01-01
Access Restriction	Open
Subject Keyword	Aerodynamics Temperature Measurement Raman Spectra Oxygen Rayleigh Scattering Ccd Cameras Supersonic Wind Tunnels Flow Distribution Wind Tunnel Tests Nitrogen Pulsed Lasers Mach Number Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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