Results 91 to 100 of about 7,948 (233)

Development of an aeroelastic stability boundary for a rotor in autorotation [PDF]

, 2008
<p>For the present study, a mathematical model AMRA was created to simulate the aeroelastic behaviour of a rotor during autorotation. Our model: Aeroelastic Model of a Rotor in Autorotation (AMRA) captures transverse bending and teeter ...
Gillies, E.A., Thomson, D.G., Trchalík, J.   +2 more
core  

A comparison of coaxial and conventional rotor performance

, 2009
The performance of a coaxial rotor in hover, in steady forward flight, and in level, coordinated turns is contrasted with that of an equivalent, conventional rotor with the same overall solidity, number of blades, and blade aerodynamic properties.
Brown, R.E., Kim, Hyo Wan, Brown, Richard E., Kim, Hyo Won   +3 more
core   +1 more source

Modelling and simulation of a quad-rotor helicopter [PDF]

, 2012
Small size quad-rotor helicopters are often used due to the\ud simplicity of their construction and maintenance, their ability\ud to hover and also to take-off and land vertically.
A. Bousbaine, Wu, Mian Hong, G.T. Poyi, Poyi, Gwangtim Timothy, Bousbaine, Amar, M.H. Wu   +5 more
core   +1 more source

Simulation study of helicopter ship landing procedures incoporating measured flow data [PDF]

, 2005
The aim of this article is to investigate the use of inverse simulation to help identify those regions of a ship's flight deck which provide the safest locations for landing a rotorcraft in various atmospheric conditions.
Galbraith, R., Thomson, D.G., Coton, F., D G Thomson, R Galbraith, Coton, F.N., Galbraith, R.A.M., F Coton   +7 more
core   +1 more source

GENERATION OF AN ADVANCED HELICOPTER EXPERIMENTAL AERODYNAMIC DATABASE

, 2009
The GOAHEAD-consortium was created in the frame of an EU-project in order to create an experimental database for the validation of 3D-CFD and comprehensive aeromechanics methods for the prediction of unsteady viscous flows including rotor dynamics for ...
Sheng, W., de Groot, Klaus, van der Wall, Berend G., Gibertini, G., Seraudie, A., Raffel, Markus, de Gegorio, Fabrizio   +6 more
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Measurements of a rotor flow in ground effect and visualization of the brown-out phenomenon [PDF]

, 2008
Quantitative and qualitative results of a series of experiments conducted on a rotor in ground effect at low forward speeds are presented. The velocity over a wide area of the ground effect wake was measured using Particle Image Velocimetry (PIV), and ...
Green, R., Nathan, N.
core  

Development of an Active Flap Rotor Model

, 2004
The research organizations ONERA and DLR initiated a common programme supported by Eurocopter (EC) and Eurocopter Deutschland (ECD) as industry partners within the Active Blade Concept (ABC).
Höfinger, Marc T., Leconte, Philippe
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Aeroacoustics of a coaxial rotor in level flight [PDF]

, 2008
The aeroacoustic characteristics of a coaxial system with teetering rotors in level forward °ight are com- pared to those of an equivalent articulated single rotor with the same solidity.
Brown, R.E., Kim, Hyo Wan, Duraisamy, K., Kim, H.W., Duraisamy, Karthikeyan, Brown, Richard   +5 more
core  

A VORTEX MODEL OF A HELICOPTER ROTOR

INCAS BULLETIN, 2009
A vortex model of a helicopter rotor is presented. Each blade of the rotor has three degrees of freedom: flapping, lagging and feathering. The motions after each degree of freedom are also known for all blades. The blade is modelled as a thin vortex surface. The wakes are free fluid surfaces.
openaire   +2 more sources

Model predictive control architecture for rotorcraft inverse simulation [PDF]

, 2013
A novel inverse simulation scheme is proposed for applications to rotorcraft dynamic models. The algorithm adopts an architecture that closely resembles that of a model predictive control scheme, where the controlled plant is represented by a high-order ...
AVANZINI, Giulio, Torasso A., Avanzini, G., Thomson, D., Torasso, A., Thomson D   +5 more
core   +1 more source