Optical effects of a temperature-mismatched supersonic mixing layer

Aaron Fassler; Sergey Leonov; Stanislav Gordeyev

doi:10.1117/12.2677429

3 October 2023 Optical effects of a temperature-mismatched supersonic mixing layer

Aaron Fassler, Sergey Leonov, Stanislav Gordeyev

Proceedings Volume 12693, Unconventional Imaging, Sensing, and Adaptive Optics 2023; 1269316 (2023) https://doi.org/10.1117/12.2677429
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

The aero-optical distortions caused by supersonic mixing layers over an optical window are relevant to the performance of hypersonic vehicles. Such mixing layers are typically temperature-mismatched due to a need to cool the optical window. To investigate the effect of the mismatched temperature across the mixing layer created by blowing a cool air over a flat window, optical measurements of an M = 2 freestream flow with an M ≈ 0.56 cooling two-dimensional jet were taken using Shack-HartmannWFS and Schlieren photography techniques. Total temperature of the freestream flow was varied from 295K to 750K, while the total temperature of the cooling jet was kept constant at 295K. Parameters of the mixing flow were examined using optical velocity methods. A new scaling method for aero-optical distortions in a temperature-mismatched, species matched supersonic mixing layer is proposed, providing an improved linear fit compared to the previous model.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Aaron Fassler, Sergey Leonov, and Stanislav Gordeyev "Optical effects of a temperature-mismatched supersonic mixing layer", Proc. SPIE 12693, Unconventional Imaging, Sensing, and Adaptive Optics 2023, 1269316 (3 October 2023); https://doi.org/10.1117/12.2677429

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