Krylov methods for large-scale dynamical systems: Application in fluid dynamics

RAS Frantz, JC Loiseau… - Applied …, 2023 - asmedigitalcollection.asme.org
In fluid dynamics, predicting and characterizing bifurcations, from the onset of unsteadiness
to the transition to turbulence, is of critical importance for both academic and industrial …

Identifying the self-sustaining mechanisms of transonic airfoil buffet with resolvent analysis

Y Iwatani, H Asada, CA Yeh, K Taira, S Kawai - AIAA Journal, 2023 - arc.aiaa.org
The self-sustaining mechanisms of shock oscillations in transonic airfoil buffet are studied by
wall-resolved large-eddy simulation (LES) and resolvent analysis. The LES successfully …

On the low-frequency unsteadiness in shock wave–turbulent boundary layer interactions

J Hao - Journal of Fluid Mechanics, 2023 - cambridge.org
The shock wave–turbulent boundary layer interaction over a compression corner is studied
using global stability analysis (GSA) and resolvent analysis based on a separation of scales …

Response of hypersonic compression corner flow to upstream disturbances

J Hao, S Cao, P Guo, CY Wen - Journal of Fluid Mechanics, 2023 - cambridge.org
Hypersonic flow over a two-dimensional compression corner is investigated using
computational fluid dynamics and global resolvent analysis in this study, which is a …

Stability of hypersonic flow over a curved compression ramp

S Cao, J Hao, P Guo, CY Wen… - Journal of Fluid …, 2023 - cambridge.org
In this work, the stability of hypersonic flow over a curved compression ramp is studied using
several stability analysis tools and direct numerical simulations (DNS). The free-stream …

Nonlinear interactions of global instabilities in hypersonic laminar flow over a double cone

J Fan, J Hao, CY Wen - Physics of Fluids, 2022 - pubs.aip.org
Hypersonic laminar flow over a canonical 25–55 double cone is studied using
computational fluid dynamics, bispectrum analysis, and dynamic mode decomposition …

Interpolatory input and output projections for flow control

B Herrmann, PJ Baddoo, STM Dawson… - Journal of Fluid …, 2023 - cambridge.org
Eigenvectors of the observability and controllability Gramians represent responsive and
receptive flow structures that enjoy a well-established connection to resolvent forcing and …

Unsteadiness of shock-boundary layer interactions in a Mach 2.0 supersonic turbine cascade

HFS Lui, TR Ricciardi, WR Wolf, J Braun, I Rahbari… - Physical Review …, 2022 - APS
The physics of shock-boundary layer interactions (SBLIs) in a supersonic turbine cascade at
Mach 2.0 and Reynolds number 395,000, based on the axial chord, is investigated through …

Global and local analyses of the Görtler instability in hypersonic flow

U Ken Chun Kit, J Hao, CY Wen - Physics of Fluids, 2023 - pubs.aip.org
The stationary Görtler instability in hypersonic flow over a concave wall is systematically
investigated across a range of geometric and flow parameters using resolvent analysis …

[HTML][HTML] Convective instabilities in a laminar shock-wave/boundary-layer interaction

SEM Niessen, KJ Groot, S Hickel, VE Terrapon - Physics of Fluids, 2023 - pubs.aip.org
Linear stability analyses are performed to study the dynamics of linear convective instability
mechanisms in a laminar shock-wave/boundary-layer interaction at Mach 1.7. In order to …