Progress of Pressure-Sensitive Measurements Via Filtered Rayleigh Scattering
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2019, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved. A filtered Rayleigh scattering (FRS) approach is modeled for imaging the two dimensional pressure field of a nanosecond laser spark generated blast wave between 2-10 after formation. Modeling shows conditions for which the FRS signal sensitivity to temperature and velocity are significantly reduced, leaving only sensitivity to pressure. In addition, FRS signal measurements shows the ability to further correct for velocity effects by taking advantage of the laser spark symmetry. Experimental results for the blast wave (for pressure) and a hot jet flow (for temperature) are shown and discussed. A strategy is described with parameters of the experimental configuration to reproduce the modeling conditions for pressure sensitivity and reduced temperature/velocity sensitivity.
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author list (cited authors)
Feng, D., Goldberg, B. M., Shneider, M. N., & Miles, R. B.