Ground-to-air flow visualization using Solar Calcium-K line Background-Oriented Schlieren

Ground-to-air flow visualization using Solar Calcium-K line Background-Oriented Schlieren The Calcium-K Eclipse Background-Oriented Schlieren experiment was performed as a proof of concept test to evaluate the effectiveness of using the solar disk as a background to perform the Background-Oriented Schlieren (BOS) method of flow visualization. A ground-based imaging system was equipped with a Calcium-K line optical etalon filter to enable the use of the chromosphere of the sun as the irregular background to be used for BOS. A US Air Force T-38 aircraft performed three supersonic runs which eclipsed the sun as viewed from the imaging system. The images were successfully post-processed using optical flow methods to qualitatively reveal the density gradients in the flow around the aircraft. Experiments in Fluids Springer Journals

Ground-to-air flow visualization using Solar Calcium-K line Background-Oriented Schlieren

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Springer Berlin Heidelberg
Copyright © 2016 by Springer-Verlag Berlin Heidelberg (outside the USA)
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
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