Results 101 to 110 of about 7,948 (233)

Numerical Investigation of Vibration Reduction Through IBC for a 20to Helicopter Rotor Model

, 2002
This paper presents theoretical results of vibration reduction through IBC (Individual Blade Control) for a 20to helicopter rotor model which are based on numerical computations.
van der Wall, Berend G., Auspitzer, Thomas, Höfinger, Marc T., Fürst, Daniel   +3 more
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Ground effect on a rotor wake. [PDF]

, 1985
The effect of the ground on a rotor wake in forward flight has been investigated experimentally in the working section of an 8ft x Oft straight-through wind tunnel.
Kusmarwanto, I.
core  

Interactional aerodynamics and acoustics of a propeller-augmented compound coaxial helicopter

, 2008
The aerodynamic and acoustic characteristics of a generic hingeless coaxial helicopter with a tail-mounted propulsor and stabiliser have been simulated using Brown's Vorticity Transport Model.
Kim, Hyo Wan, Kenyon, Adam R., Duraisamy, Karthikeyan, Brown, Richard   +3 more
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Influence of blade aerodynamic model on the prediction of helicopter high-frequency airloads

, 2011
Brown’s vorticity transport model has been used to investigate the influence of the blade aerodynamic model on the accuracy with which the high-frequency airloads associated with helicopter blade–vortex interactions can be predicted.
Kelly, Mary E., Mary E. Kelly, Richard E. Brown, Brown, Richard   +3 more
core   +1 more source

NUMERICAL ANALYSIS OF HUB AND FUSELAGE INTERFERENCE TO REDUCE HELICOPTER DRAG

, 2012
A numerical investigation was carried out to predict the mutual interference between helicopter components. The investigation was based on the solution of RANS equations in three dimensions using unstructured grids.
Khier, Walid
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High-Fidelity Optimization Framework for Helicopter Rotors

, 2009
An optimization framework for helicopter rotors based on high-fidelity coupled CFD/CSM analyses is presented. For this purpose the optimization software DAKOTA has been linked to a parametric geometry unit, a mesh generation unit and a fluid-structure ...
Imiela, Manfred
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Implementation of a trim routine in a rotor model for the numerical simulation of helicopter flow-fields

, 2006
Includes bibliographical references (p. 82-83)The aim of the current project is to develop, validate and implement a trim routine for a numerical rotor model, developed for the use in simulations of a helicopter exterior flow-field. In this investigation
Naidoo, Vaneshen
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CHANCE: A FRENCH-GERMAN HELICOPTER CFD-PROJECT

, 2006
The paper gives an overview of the CHANCE research project (partly supported by the French DPAC and DGA and the German BMWA) which was started in 1998 between the German and French Aerospace Research Centres DLR and ONERA, the University of Stuttgart and
Pahlke, Klausdieter, Costes, Michel, Castellin, Christophe, Altmikus, Andree, D'Alascio, Alessandro   +4 more
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Preliminary design of small distributed ducted electric tail rotor helicopter

Hangkong gongcheng jinzhan
To address the issues of complex transmission structure, low fault tolerance, and poor safety in traditional single-rotor helicopters with tail rotors(such as high accident rates due to tail rotor transmission system failures and collisions easily ...
LIU Chaofan, DENG Haoxuan, WANG Liangquan   +2 more
doaj   +1 more source

The flow physics of helicopter brownout

, 2010
The formation of the dust cloud that is associated with low-level helicopter operations in desert environments has been simulated using the Vorticity Transport Model together with a coupled model to represent the entrainment and subsequent transport of ...
Brown, R.E., Kim, Hyo Wan, Phillips, Catriona   +2 more
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