Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Lehnasch, Guillaume"'
Autor:
Jaunet, Vincent, Lehnasch, Guillaume
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 azimuthal Fourier mode of flow fluctuations and examines their behavior wi
Externí odkaz:
http://arxiv.org/abs/2406.00677
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 to explain transition near the stagnation point in axisymmetric bodies
Externí odkaz:
http://arxiv.org/abs/2311.02486
Hypersonic boundary layers exhibit diverse transition pathways, influenced by various flow conditions and environments. Non-modal mechanisms, such as the lift-up effect, are recognized as pivotal contributors to transition, particularly over complex
Externí odkaz:
http://arxiv.org/abs/2311.02463
Autor:
Moldovan, Gabriel, Mariotti, Alessandro, Cordier, Laurent, Lehnasch, Guillaume, Salvetti, Maria - Vittoria, Meldi, Marcello
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 calibrate solvers for Large Eddy Simulation for the analysis of the h
Externí odkaz:
http://arxiv.org/abs/2212.13831
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 flows, Journal of Computational Physics 443-110481) recently proposed
Externí odkaz:
http://arxiv.org/abs/2210.10157
Autor:
Moldovan, Gabriel-Ionut, Mariotti, Alessandro, Cordier, Laurent, Lehnasch, Guillaume, Salvetti, Maria-Vittoria, Meldi, Marcello
Publikováno v:
In Computers and Fluids 30 August 2024 281
Autor:
Bakulu, Florian, Lehnasch, Guillaume, Jaunet, Vincent, da Silva, Eric Goncalves, Girard, Steve
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 side-load properties. The temporal and spatial organization of wall pre
Externí odkaz:
http://arxiv.org/abs/2007.04704
Publikováno v:
In Combustion and Flame May 2022 239
Autor:
LEHNASCH, Guillaume
Cette étude est inspirée en particulier par le besoin, lors de la phase d'intégration d'un moteur aéronautique, de maîtriser a priori les risques d'endommagements liés à la possible décharge d'un écoulement de gaz brûlés à haute pression
Externí odkaz:
http://tel.archives-ouvertes.fr/tel-00010669
http://tel.archives-ouvertes.fr/docs/00/04/86/42/PDF/tel-00010669.pdf
http://tel.archives-ouvertes.fr/docs/00/04/86/42/PDF/tel-00010669.pdf
Publikováno v:
In International Journal of Hydrogen Energy 26 April 2018 43(17):8488-8505