On low-frequency unsteadiness in swept hypersonic shockwave/boundary layer interactions
ORAL
Abstract
We present Direct Numerical Simulations (DNS) of hypersonic Shockwave/Boundary-Layer Interactions (SBLIs) in the presence of cross flow, as a computational surrogate of genuine three-dimensional SBLIs. We analyze the low frequency dynamics of the SBLI configurations and we characterize the temporal and spatial dynamics of the shock system.
We present evidence that, in the presence of cross flow, the large scale ripples are advected at a fraction of the mean spanwise velocity and with a specific spanwise wavelength linearly proportional to the separation length.
The numerically computed peak frequencies very well conform with the predictive formula of Ceci et al. (J. Fluid Mech. 2023, vol. 956, R1).
Based on the actual findings we suggest that the same phenomenology found in the supersonic regime also holds in the hypersonic one.
We present evidence that, in the presence of cross flow, the large scale ripples are advected at a fraction of the mean spanwise velocity and with a specific spanwise wavelength linearly proportional to the separation length.
The numerically computed peak frequencies very well conform with the predictive formula of Ceci et al. (J. Fluid Mech. 2023, vol. 956, R1).
Based on the actual findings we suggest that the same phenomenology found in the supersonic regime also holds in the hypersonic one.
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Publication: Planned paper: "On low-frequency unsteadiness in swept hypersonic shockwave/boundary layer interactions"
Presenters
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Alessandro Ceci
University of Rome La Sapienza
Authors
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Alessandro Ceci
University of Rome La Sapienza
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Andrea Palumbo
University of Rome La Sapienza
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Johan Larsson
University of Maryland, College Park
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Sergio Pirozzoli
Sapienza University of Rome, University of Rome La Sapienza