Simultaneous measurements of density field and wavefront distortions in high speed flows

Jacob George; Thomas Jenkins; James Trolinger; Cecil Hess; Benjamin Buckner

doi:10.1117/12.2275883

6 September 2017 Simultaneous measurements of density field and wavefront distortions in high speed flows

Jacob George, Thomas Jenkins, James Trolinger, Cecil Hess, Benjamin Buckner

Proceedings Volume 10410, Unconventional and Indirect Imaging, Image Reconstruction, and Wavefront Sensing 2017; 1041006 (2017) https://doi.org/10.1117/12.2275883
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

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.

Conference Presentation

Citation Download Citation

Jacob George, Thomas Jenkins, James Trolinger, Cecil Hess, and 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); https://doi.org/10.1117/12.2275883

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