# Numerical Investigation of Second Mode Attenuation over Carbon/Carbon Surfaces on a Sharp Slender Cone

@article{Sousa2017NumericalIO,
title={Numerical Investigation of Second Mode Attenuation over Carbon/Carbon Surfaces on a Sharp Slender Cone},
author={Victor C. B. Sousa and Danish Patel and Jean-Baptiste Chapelier and Alexander Wagner and Carlo Scalo},
journal={arXiv: Fluid Dynamics},
year={2017}
}
• Published 8 December 2017
• Physics
• arXiv: Fluid Dynamics
We have carried out axisymmetric numerical simulations of a spatially developing hypersonic boundary layer over a sharp 7$^{\circ{}}$-half-angle cone at $M_\infty=7.5$ inspired by the experimental investigations by Wagner (2015). Simulations are first performed with impermeable (or solid) walls with a one-time broadband pulse excitation applied upstream to determine the most convectively-amplified frequencies resulting in the range 260kHz -- 400kHz, consistent with experimental observations of…
4 Citations

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## References

SHOWING 1-10 OF 50 REFERENCES

• Engineering
Journal of Fluid Mechanics
• 2003
Experimental and theoretical studies of the effect of an ultrasonically absorptive coating (UAC) on hypersonic boundary-layer stability are described. A thin coating of fibrous absorbent material
• Physics
Journal of Fluid Mechanics
• 2013
Abstract Numerical simulations of the linear and nonlinear two-dimensional Navier–Stokes equations, and linear stability theory are used to parametrically investigate hypersonic boundary layers over
• Physics
• 2011
*† ‡ § Ultrasonically absorptive coatings (UAC) can stabilize the Mack second mode and thereby increase the laminar run on configurations where laminar-turbulent transition is second-mode dominated.
• Engineering
• 2003
Theoretical and experimental studies of hypersonic boundary-layer stabilization using a passive porous coating of regular microstructure are discussed. Propagation of disturbances inside pores is
• Engineering
• 2013
For the first time, the influence of ultrasonically absorptive carbon–carbon material on hypersonic laminar to turbulent boundary layer transition was investigated experimentally. A 7° half-angle
• Physics
• 2014
Abstract Preceding studies in the high enthalpy shock tunnel Göttingen of the German Aerospace Center (DLR) revealed that carbon fibre reinforced carbon ceramic (C/C) surfaces can be utilized to damp
• Physics
Journal of Fluid Mechanics
• 2014
Abstract Direct numerical simulations were performed to investigate wavepackets in a sharp cone boundary layer at Mach 6. In order to understand the natural transition process in hypersonic cone
• Physics
• 2014
We have performed large-eddy simulations of isothermal-wall compressible turbulent channel flow with linear acoustic impedance boundary conditions (IBCs) for the wall-normal velocity component and
• Physics, Engineering
• 2001
A second-mode stability analysis has been performed for a hypersonic boundary layer on a wall covered by a porous coating with equally spaced cylindrical blind microholes. Massive reduction of the
• Mathematics
• 2017
Assigning boundary conditions, such as acoustic impedance, to the frequency domain thermoviscous wave equations (TWE), derived from the linearized Navier-Stokes equations (LNSE) poses a Helmholtz