Numerical investigation of unswept and swept turbulent shock-wave boundary layer interactions

Andreas Gross; Jesse Little; Hermann F. Fasel

doi:10.1016/j.ast.2022.107455

Numerical investigation of unswept and swept turbulent shock-wave boundary layer interactions

Andreas Gross, Jesse Little, Hermann F. Fasel

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

Hybrid turbulence model and large-eddy simulations of turbulent shock-wave boundary layer interactions at a freestream Mach number of 2.3 were carried out for sweep angles of 0 and 40 deg. The simulations for the unswept interaction reveal the shedding of spanwise coherent structures as well as intermittent spanwise deformations of the separation line. The frequencies associated with the spanwise deformations are in the low- to mid-frequency band. By adding a cross-flow component to the approach flow, a comparable turbulent interaction with 40 deg sweep was obtained. For the swept interaction, the overall level of the pressure fluctuations is higher than for the unswept case but the spanwise structures are absent. Instead, traveling oblique structures are observed downstream of the interaction.

Original language	English (US)
Article number	107455
Journal	Aerospace Science and Technology
Volume	123
DOIs	https://doi.org/10.1016/j.ast.2022.107455
State	Published - Apr 2022
Externally published	Yes

Keywords

Large-Eddy simulation
Shock-wave boundary layer interaction
Turbulence

ASJC Scopus subject areas

Aerospace Engineering

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10.1016/j.ast.2022.107455

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title = "Numerical investigation of unswept and swept turbulent shock-wave boundary layer interactions",

abstract = "Hybrid turbulence model and large-eddy simulations of turbulent shock-wave boundary layer interactions at a freestream Mach number of 2.3 were carried out for sweep angles of 0 and 40 deg. The simulations for the unswept interaction reveal the shedding of spanwise coherent structures as well as intermittent spanwise deformations of the separation line. The frequencies associated with the spanwise deformations are in the low- to mid-frequency band. By adding a cross-flow component to the approach flow, a comparable turbulent interaction with 40 deg sweep was obtained. For the swept interaction, the overall level of the pressure fluctuations is higher than for the unswept case but the spanwise structures are absent. Instead, traveling oblique structures are observed downstream of the interaction.",

keywords = "Large-Eddy simulation, Shock-wave boundary layer interaction, Turbulence",

author = "Andreas Gross and Jesse Little and Fasel, {Hermann F.}",

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year = "2022",

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doi = "10.1016/j.ast.2022.107455",

language = "English (US)",

volume = "123",

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T1 - Numerical investigation of unswept and swept turbulent shock-wave boundary layer interactions

AU - Gross, Andreas

AU - Little, Jesse

AU - Fasel, Hermann F.

PY - 2022/4

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N2 - Hybrid turbulence model and large-eddy simulations of turbulent shock-wave boundary layer interactions at a freestream Mach number of 2.3 were carried out for sweep angles of 0 and 40 deg. The simulations for the unswept interaction reveal the shedding of spanwise coherent structures as well as intermittent spanwise deformations of the separation line. The frequencies associated with the spanwise deformations are in the low- to mid-frequency band. By adding a cross-flow component to the approach flow, a comparable turbulent interaction with 40 deg sweep was obtained. For the swept interaction, the overall level of the pressure fluctuations is higher than for the unswept case but the spanwise structures are absent. Instead, traveling oblique structures are observed downstream of the interaction.

AB - Hybrid turbulence model and large-eddy simulations of turbulent shock-wave boundary layer interactions at a freestream Mach number of 2.3 were carried out for sweep angles of 0 and 40 deg. The simulations for the unswept interaction reveal the shedding of spanwise coherent structures as well as intermittent spanwise deformations of the separation line. The frequencies associated with the spanwise deformations are in the low- to mid-frequency band. By adding a cross-flow component to the approach flow, a comparable turbulent interaction with 40 deg sweep was obtained. For the swept interaction, the overall level of the pressure fluctuations is higher than for the unswept case but the spanwise structures are absent. Instead, traveling oblique structures are observed downstream of the interaction.

KW - Large-Eddy simulation

KW - Shock-wave boundary layer interaction

KW - Turbulence

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Numerical investigation of unswept and swept turbulent shock-wave boundary layer interactions

Abstract

Keywords

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