Study of Rayleigh scattering for visualization of helium-air mixing at Mach 6Using an ArF excimer laser, planar Rayleigh scattering measurements were performed to investigate helium mixing into air at supersonic speeds. These experiments were conducted in the Mach 6, high-Reynolds-number facility at NASA Langley Research Center. The capability of the Rayleigh scattering technique for flow visualization of a turbulent environment was demonstrated. The qualitative agreement between the averaged Rayleigh results and the reduced mean-mass-densities obtained from probe measurements substantiate that careful application of the technique, even in the presence of clusters, can give very useful results. It was also demonstrated that planar, quantitative measurements can be made in the absence of clusters.
Document ID
19920071705
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Shirinzadeh, B. (NASA Langley Research Center Hampton, VA, United States)
Balla, R. J. (NASA Langley Research Center Hampton, VA, United States)
Hillard, M. E. (NASA Langley Research Center Hampton, VA, United States)
Anders, J. B. (NASA Langley Research Center Hampton, VA, United States)
Exton, R. J. (NASA Langley Research Center Hampton, VA, United States)
Waitz, I. A. (California Institute of Technology Pasadena, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: ICIASF ''91 - International Congress on Instrumentation in Aerospace Simulation Facilities