Journal ArticleDOI
Direct numerical simulation of impinging shock wave/turbulent boundary layer interaction at M=2.25
TLDR
In this paper, the interaction of a spatially developing adiabatic boundary layer flow at M∞=2.25 and Reθ=3725 with an impinging oblique shock wave (β=33.2°) is analyzed by means of direct numerical simulation of the compressible Navier-Stokes equations.Abstract:
The interaction of a spatially developing adiabatic boundary layer flow at M∞=2.25 and Reθ=3725 with an impinging oblique shock wave (β=33.2°) is analyzed by means of direct numerical simulation of the compressible Navier-Stokes equations. Under the selected flow conditions the incoming boundary layer undergoes mild separation due to the adverse pressure gradient. Coherent structures are shed near the average separation point and the flow field exhibits large-scale low-frequency unsteadiness. The formation of the mixing layer is primarily responsible for the amplification of turbulence, which relaxes to an equilibrium state past the interaction. Complete equilibrium is attained in the inner part of the boundary layer, while in the outer region the relaxation process is incomplete. Far from the interaction zone, turbulence exhibits a universal behavior and it shows similarities with the incompressible case. The interaction of the coherent structures with the incident shock produces acoustic waves that prop...read more
Citations
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Journal ArticleDOI
Low-Frequency Unsteadiness of Shock Wave/Turbulent Boundary Layer Interactions
TL;DR: In this article, a plausible model is proposed that the interaction responds as a dynamical system that is forced by external disturbances, and the evidence suggests that their impact is reduced with increasing size of the separated flow.
Journal ArticleDOI
Large-eddy simulation of low-frequency unsteadiness in a turbulent shock-induced separation bubble
Emile Touber,Neil D. Sandham +1 more
TL;DR: In this paper, a large-eddy simulation of the interaction between an impinging oblique shock and a Mach 2.3 turbulent boundary layer is presented, which does not introduce any energetic low frequencies into the domain, hence avoiding possible interference with the shock/boundary layer interaction system.
Journal ArticleDOI
Progress in shock wave/boundary layer interactions
TL;DR: In this paper, a review of recent advances in boundary layer interaction research is presented, including low frequency unsteadiness, heat transfer prediction capability, complex (multi-shock boundary layer) interactions and flow control techniques.
Journal ArticleDOI
A simple model for low-frequency unsteadiness in shock-induced separation
TL;DR: In this paper, a model to explain the low-frequency unsteadiness found in shock-induced separation is proposed for cases in which the flow is reattaching downstream, based on the properties of fluid entrainment in the mixing layer generated downstream of the separation shock whose lowfrequency motions are related to successive contractions and dilatations of the separated bubble.
Journal ArticleDOI
Numerical Methods for High-Speed Flows
TL;DR: In this paper, the authors review numerical methods for direct numerical simulation (DNS) and large-eddy simulation (LES) of turbulent compressible flow in the presence of shock waves.
References
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Book
Viscous Fluid Flow
TL;DR: In this article, the stability of Laminar Boundary Layer Flow Appendices has been investigated in Cylindrical and Spherical Coordinates of Incompressible Newtonian Fluids.
Journal ArticleDOI
Direct simulation of a turbulent boundary layer up to R sub theta = 1410
TL;DR: In this paper, the turbulent boundary layer on a flat plate, with zero pressure gradient, is simulated numerically at four stations between R sub theta = 225 and R sub tta = 1410.
Journal ArticleDOI
Turbulence models for near-wall and low Reynolds number flows - A review
Wind tunnel experiments on the flow over rectangular cavities at subsonic and transonic speeds
TL;DR: In this article, measurements have been made of the time average and unsteady pressures acting on the roof and behind a series of rectangular cavities set in the roof of the 2 ft x 1 tr ft transonic tunnel.
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