Wavefront sensors for optical diagnostics in fluid mechanics: application to heated flow, turbulence, and droplet evaporation

Daniel R. Neal; Timothy J. O'Hern; John R. Torczynski; Mial E. Warren; Randy J. Shul; T. Stewart McKechnie

doi:10.1117/12.163703

2 December 1993 Wavefront sensors for optical diagnostics in fluid mechanics: application to heated flow, turbulence, and droplet evaporation

Daniel R. Neal, Timothy J. O'Hern, John R. Torczynski, Mial E. Warren, Randy J. Shul, T. Stewart McKechnie

Author Affiliations +

Proceedings Volume 2005, Optical Diagnostics in Fluid and Thermal Flow; (1993) https://doi.org/10.1117/12.163703
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

Optical measurement techniques are extremely useful in fluid mechanics because of their non- invasive nature. However, it is often difficult to separate measurement effects due to pressure, temperature and density in real flows. Using a variation of a Shack-Hartmann wavefront sensor, we have made wavefront measurements that have extremely large dynamic range coupled with excellent sensitivity at high temporal and spatial resolution. These wavefront variations can be directly related to density perturbations in the fluid. We have examined several classes of flow including volumetrically heated gas, grid turbulence and droplet evaporation.

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Daniel R. Neal, Timothy J. O'Hern, John R. Torczynski, Mial E. Warren, Randy J. Shul, and T. Stewart McKechnie "Wavefront sensors for optical diagnostics in fluid mechanics: application to heated flow, turbulence, and droplet evaporation", Proc. SPIE 2005, Optical Diagnostics in Fluid and Thermal Flow, (2 December 1993); https://doi.org/10.1117/12.163703

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