Formulation of Aerodynamic Forces on Helicopters in Non Uniform Flow with Scale Model Tests : Ground Effects. - ONERA - Office national d'études et de recherches aérospatiales Access content directly
Conference Papers Year : 2014

Formulation of Aerodynamic Forces on Helicopters in Non Uniform Flow with Scale Model Tests : Ground Effects.

Abstract

The simulation of helicopter recovery on a frigate is a very complex problem due to the non uniform flow around the frigate deck and the aeroelastic characteristics of the rotor. Small scale tests with helicopters are generally not in complete similarity and might be expensive. The number of state variables influencing the aerodynamic forces are too numerous so it is not possible to characterize all the configurations. So these tests with a small scale radio controlled helicopter attached to a balance and not flying are done as an attempt to measure the differences on the aerodynamic torque due to the non uniform flow around a frigate. To validate the experimental procedure, measurements are done with and without a ground, and flow visualizations are carried out. The forces measurements of the ground effects correspond to known results and the trajectories of vortices shed at the blade tips are extracted from the visualizations.
Fichier principal
Vignette du fichier
DAAP14011.1392908464.pdf (1.08 Mo) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-01059055 , version 1 (29-08-2014)

Identifiers

  • HAL Id : hal-01059055 , version 1

Cite

J.B. Paquet, J.P. Bourez, S. Morgand. Formulation of Aerodynamic Forces on Helicopters in Non Uniform Flow with Scale Model Tests : Ground Effects.. 49th International Symposium of Applied Aerodynamics, Mar 2014, LILLE, France. ⟨hal-01059055⟩

Collections

ONERA
99 View
557 Download

Share

Gmail Facebook X LinkedIn More