Skip to Main content Skip to Navigation
Theses

Etude du sillage de rotors d'hélicoptère en configuration de Vortex Ring State

Abstract : The Vortex Ring State has received recently a renewal of interest because of the definition of steeper approach trajectories for city landing that lead to flying condition closer to VRS boundaries. In past years, numerical aspects have been studied with empirical methods or analytical models, and experiments have been made in order to better understand the physics of the phenomenon. In this study, the CFD code elsA was used in order to solve the Euler equations. A sweep in vertical descent speed with different grids was performed with an aim to evaluate the capability of the solver to capture the Vortex Ring State. Firstly, the accuracy of the flowfield representation was evaluated according to numerical hypothesis (strategy and accuracy of the grids, ) and physical hypothesis (periodicity of the flow, kinematic of the rotor, ...). It allows to extract the options to realize, secondly, the most representative simulations of the VRS regime in order to study and describe the mechanism of appearance and evolution of this phenomenon.
Document type :
Theses
Complete list of metadatas

Cited literature [47 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00257413
Contributor : Eric Hoinville <>
Submitted on : Tuesday, February 19, 2008 - 12:18:44 PM
Last modification on : Friday, October 23, 2020 - 4:51:49 PM
Long-term archiving on: : Thursday, May 20, 2010 - 7:11:05 PM

Identifiers

  • HAL Id : tel-00257413, version 1

Citation

Eric Hoinville. Etude du sillage de rotors d'hélicoptère en configuration de Vortex Ring State. Modélisation et simulation. Université d'Orléans, 2007. Français. ⟨tel-00257413⟩

Share

Metrics

Record views

1005

Files downloads

18699