28 citations · 53 across the 7 of their papers we have counts for
6 papers · 1 filter
Linear dynamics of over-expanded annular supersonic jets
Vincent Jaunet, Guillaume Lehnasch
This article delves into the dynamics of inviscid annular supersonic jets, akin to those exiting converging-diverging nozzles in over-expanded regimes. It focuses on the first azim…
Perturbation amplification near the stagnation point of blunt bodies
Eduardo Martini, Clement Caillaud, Guillaume Lehnasch +2
Different transition to turbulence routes for the flow around blunt bodies are possible. Non-modal amplification of perturbations via the lift-up effect has recently been explored…
Effect of streaks on hypersonic boundary layer instability
Clément Caillaud, Guillaume Lehnasch, Eduardo Martini +1
Hypersonic boundary layers exhibit diverse transition pathways, influenced by various flow conditions and environments. Non-modal mechanisms, such as the lift-up effect, are recogn…
Multigrid sequential data assimilation for the large-eddy simulation of a massively separated bluff-body flow
Gabriel Moldovan, Alessandro Mariotti, Laurent Cordier +3
The potential for data-driven applications to scale-resolving simulations of turbulent flows is assessed herein. Multigrid sequential data assimilation algorithms have been used to…
Optimized parametric inference for the inner loop of the Multigrid Ensemble Kalman Filter
Gabriel Moldovan, Guillaume Lehnasch, Laurent Cordier +1
Essential features of the Multigrid Ensemble Kalman Filter (G. Moldovan, G. Lehnasch, L. Cordier, M. Meldi, A multigrid/ensemble Kalman filter strategy for assimilation of unsteady…
Jet resonance in truncated ideally contoured nozzle
Florian Bakulu, Guillaume Lehnasch, Vincent Jaunet +2
An overexpanded jet in a truncated ideally contoured nozzle is found to feature a tonal behavior. The flow field is investigated to understand its origin and show how it modifies s…