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2019 | OriginalPaper | Chapter

Structure and Unsteadiness of Swept-Ramp Shock Wave/Turbulent Boundary Layer Interactions

Authors : L. Vanstone, N. T. Clemens

Published in: 31st International Symposium on Shock Waves 1

Publisher: Springer International Publishing

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Abstract

In this study we investigate the flow structure and large-scale unsteadiness of a 3D shock wave/turbulent boundary layer interaction generated by a swept compression ramp in a Mach 2 flow. The unsteady dynamics of the flow are investigated using 50 kHz particle image velocimetry (PIV) in side-view and plan-view planes. The 50 kHz PIV velocity data are bandpass-filtered to investigate potential mechanisms that drive the large-scale unsteadiness. Our analysis shows that strong correlation exists between velocity fluctuations in the upstream boundary layer and motion of the separation-line surrogate for frequencies lower than 10 kHz (0.25 U ∞/δ 99). This frequency band correlates well with the characteristic frequency range of boundary layer superstructures. Separated flow motions in the high-frequency band (10–50 kHz) do not seem to be strongly correlated to the upstream flow, instead significant correlation is observed with structures within the separation region that move primarily in the cross-stream direction.

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previous chapter Kinetic Shock Tubes: Recent Developments for the Study of Homogeneous and Heterogeneous Chemical Processes
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Metadata
Title
Structure and Unsteadiness of Swept-Ramp Shock Wave/Turbulent Boundary Layer Interactions
Authors
L. Vanstone
N. T. Clemens
Copyright Year
2019
Book
31st International Symposium on Shock Waves 1

Print ISBN: 978-3-319-91019-2

Electronic ISBN: 978-3-319-91020-8

Copyright Year: 2019

DOI
https://doi.org/10.1007/978-3-319-91020-8_8

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