6 September 2017 Simultaneous measurements of density field and wavefront distortions in high speed flows
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Abstract
This paper presents results from simultaneous measurements of fluid density and the resulting wavefront distortions in a sonic underexpanded jet. The density measurements were carried out using Rayleigh scattering, and the optical distortions were measured using a wavefront sensor based on phase shifting interferometry. The measurements represent a preliminary step toward relating wavefront distortions to a specific flow structure. The measured density field is used to compute the phase distortions using a wave propagation model based on a geometric-optics approximation, and the computed phase map shows moderate agreement with that obtained using the wavefront sensor.
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Jacob George, Jacob George, Thomas Jenkins, Thomas Jenkins, James Trolinger, James Trolinger, Cecil Hess, Cecil Hess, Benjamin Buckner, Benjamin Buckner, } "Simultaneous measurements of density field and wavefront distortions in high speed flows", Proc. SPIE 10410, Unconventional and Indirect Imaging, Image Reconstruction, and Wavefront Sensing 2017, 1041006 (6 September 2017); doi: 10.1117/12.2275883; https://doi.org/10.1117/12.2275883
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