Numerical Analysis of Porous Coatings Stabilizing Capabilities on Hypersonic Boundary-Layer Transition
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Numerical Analysis of Porous Coatings Stabilizing Capabilities on Hypersonic Boundary-Layer Transition. / Fievet, Romain; Deniau, Hugues; Brazier, Jean-Philippe; Piot, Estelle.
I: AIAA Journal, Bind 59, Nr. 10, 10.2021, s. 3845-3858.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Numerical Analysis of Porous Coatings Stabilizing Capabilities on Hypersonic Boundary-Layer Transition
AU - Fievet, Romain
AU - Deniau, Hugues
AU - Brazier, Jean-Philippe
AU - Piot, Estelle
PY - 2021/10
Y1 - 2021/10
N2 - A high-order spectral difference flow solver is used to perform direct numerical simulations (DNS) of a hypersonic laminar boundary layer on an ultrasonically absorptive coating (UAC), in order to analyze the stabilizing effects of such a material on the laminar-turbulent transition. The UAC is modeled in the simulations by a time-domain impedance boundary condition, which is calibrated to replicate the acoustic response of the UAC over a broad spectral range. The frequency-dependence damping effectiveness is investigated, as are any other side effects the porous coating might have on the mean flow. It is found that the second-mode instability, which dominates the high-Mach number flow regime, is strongly suppressed for all excitation frequencies considered. The DNS solutions are also found to compare favorably with linearized stability theory. Finally, a side effect of theUACis the modification of the medium dispersive properties and the change of the perturbation group velocity.
AB - A high-order spectral difference flow solver is used to perform direct numerical simulations (DNS) of a hypersonic laminar boundary layer on an ultrasonically absorptive coating (UAC), in order to analyze the stabilizing effects of such a material on the laminar-turbulent transition. The UAC is modeled in the simulations by a time-domain impedance boundary condition, which is calibrated to replicate the acoustic response of the UAC over a broad spectral range. The frequency-dependence damping effectiveness is investigated, as are any other side effects the porous coating might have on the mean flow. It is found that the second-mode instability, which dominates the high-Mach number flow regime, is strongly suppressed for all excitation frequencies considered. The DNS solutions are also found to compare favorably with linearized stability theory. Finally, a side effect of theUACis the modification of the medium dispersive properties and the change of the perturbation group velocity.
KW - 2ND-MODE ATTENUATION
KW - RECEPTIVITY
KW - SIMULATION
KW - SCHEMES
KW - DESIGN
KW - FLOW
U2 - 10.2514/1.J059830
DO - 10.2514/1.J059830
M3 - Journal article
VL - 59
SP - 3845
EP - 3858
JO - AIAA Journal
JF - AIAA Journal
SN - 0001-1452
IS - 10
ER -
ID: 289456931