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Proceedings Paper

Aero-optic analysis of anisotropic turbulent boundary layer by direct integration
Author(s): S. Taylor; J. Price; C. P. Chen; John E. Pond; G. W. Sutton
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Paper Abstract

Aero-optic aberrations that effect optical sensor performance and laser beam propagation, can be caused by changes in the index-of-refraction field as the optical wave traverses a compressible non-uniform, turbulent flowfield. Mean flowfield non-uniformities cause bore sight error and blurring and, if the mean flowfield is unsteady, jitter. Turbulence causes blurring and high frequency jitter. Blurring also causes the signal-to-noise ratio to decrease and image distortion, and adversely affects centroid location for precision tracking. The objective of this study is to develop an unified approach for whole-field aero-optics prediction using hybrid LES/RANS (Large Eddy Simulation/Reynolds Average Navier-Stokes) turbulence modeling in combination with a newly formulated optical Modulation Transfer Function (MTF). The whole field turbulence includes the near-vehicle boundary layer mean and turbulence, as well as far-field atmospheric turbulence. A flat plate compressible boundary layer case is used to demonstrate the methodology. the abstract two lines below author names and addresses.

Paper Details

Date Published: 17 September 2013
PDF: 15 pages
Proc. SPIE 8877, Unconventional Imaging and Wavefront Sensing 2013, 887705 (17 September 2013); doi: 10.1117/12.2025408
Show Author Affiliations
S. Taylor, The Univ. of Alabama in Huntsville (United States)
J. Price, The Univ. of Alabama in Huntsville (United States)
C. P. Chen, The Univ. of Alabama in Huntsville (United States)
John E. Pond, Analysis and Applications Associates (United States)
G. W. Sutton, Analysis and Applications Associates (United States)

Published in SPIE Proceedings Vol. 8877:
Unconventional Imaging and Wavefront Sensing 2013
Jean J. Dolne; Thomas J. Karr; Victor L. Gamiz, Editor(s)

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