Results 111 to 120 of about 7,948 (233)
Modelling of tilt rotor mission performance to assess environmental impact [PDF]
, 2012 New technologies and new rotorcraft operations are being developed in order to meet new environmental requirements such as noise reduction and less pollutant emissions. In this project a parametric study was developed over a tilt rotor model in order to
Ruge Montilla, Jhonn Hamberth +1 more
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A rational approach to comparing the performance of coaxial and conventional rotors
, 2009 The merit, in terms of its efficiency and performance, of the twin, contrarotating coaxial rotor configuration over the more conventional single rotor system has long been a point of contention.
Brown, R.E., Kim, Hyo Wan
core +1 more source
Development of a rotor model for the numerical simulation of helicopter exterior flow-fields
, 2004 Includes bibliographical references (leaves 84-85).A numerical methodology is developed to model the effect of a rotor on the surrounding flow-field. The model calculates the time-averaged aerodynamic forces exerted on the air by the fan blades within ...
Hotchkiss, Paul
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Numerical study of the unsteady aerodynamics of helicopter rotor aerofoils
, 1999 A two-dimensional model of the aerodynamics of rotor blades in forward flight is proposed in which the motion of the blade is represented by periodical variations of the freestrearn velocity and incidence. A novel implicit methodology for the solution
Shaw, Scott, Shaw, S.T.
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The effect of blade aerodynamic modelling on the prediction of high-frequency rotor airloads
, 2009 Interactions between the blades and vortical structures within the wake of a helicopter rotor are a significant source of impulsive loading and noise, particularly in descending flight.
Kelly, Mary E. +3 more
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Applying rotorcraft modelling technology to renewable energy research
, 2009 The perceived need to reduce mankind's impact on the global climate motivates towards a future society in which a significant proportion of its energy needs will be extracted from the winds and the tides of the planet.
Kelly, Mary E. +5 more
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Empirical measurements of small unmanned aerial vehicle co-axial rotor systems
, 2011 Small unmanned aerial vehicles (SUAV) are beginning to dominate the area of intelligence, surveillance, target acquisition and reconnaissance (ISTAR) in forward operating battlefield scenarios.
Prior, Stephen D., Bell, Jonathon
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A Vectoring Thrust Coaxial Rotor for Micro Air Vehicle: Modeling, Design and Analysis [PDF]
, 2013 The growing interest of rotary wing UAVs, for military and civilian applications, has encouraged designers to consider miniaturized configurations, more efficient in terms of endurance, payload capability and maneuverability. The purpose of this paper is
Moschetta, Jean-Marc, Prothin, Sebastien
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GARTEUR Helicopter Cooperative Research
, 2010 This paper starts with an overview about the general structure of the Group for Aeronautical Research and Technology in EURope (GARTEUR). The focus is on the activities related to rotorcraft which are managed in the GARTEUR Helicopter Group of ...
Pahlke, Klausdieter
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