Results 81 to 90 of about 66,325 (272)
Wind Energy, Volume 28, Issue 5, May 2025.ABSTRACT A thorough understanding of turbine wakes is essential for various aspects of wind energy, including turbine siting, load evaluation, and wind farm control. However, high‐fidelity time‐domain computational fluid dynamics (CFD) simulations that consider all possible turbulent inflow wind conditions are computationally expensive and impractical ...
Wenhao Xu, Gaohua Li, Feng Guo, Zhen Gao
wiley +1 more source
Thrust pulsation of coaxial main rotor, caused by the blades relative position
Научный вестник МГТУ ГА, 2020 The influence of reciprocal position of the upper rotor blades in respect to the lower rotor blades is characteristic for coaxial main rotor. It is established that the initial azimuth of the blade, for example, of the upper rotor’s which does not ...
B. S. Kritsky +3 more
doaj +1 more source
Helicopter low-speed yaw control [PDF]
, 1993 A system for improving yaw control at low speeds consists of one strake placed on the upper portion of the fuselage facing the retreating rotor blade and another strake placed on the lower portion of the fuselage facing the advancing rotor blade.
Crowell, Cynthia A. +2 more
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Review on Icephobicity of Materials Surface Enhanced by Interface Action Force
Advanced Materials Interfaces, Volume 12, Issue 6, March 16, 2025.As ‘energy‐free’ passive anti‐icing strategies have not yet been effectively implemented, a comprehensive understanding of the mechanisms through which mechanical forces influence the evolution of solid‐liquid, solid‐liquid/ice interfaces, and solid‐ice interfaces, as well as the integration of mechanical forces with various types of active/passive ...
Lingfeng Zhao +5 more
wiley +1 more source
The effectiveness of the EPNL procedure in quantifying helicopter blade slap and tail rotor noise heard on approach some distance from the flyover position is addressed.
Leverton, J. W. +2 more
core +1 more source
Smart actuation for helicopter rotorblades [PDF]
, 2012 Successful rotorcrafts were only achieved when the differences between hovering flight conditions and a stable forward flight were understood. During hovering, the air speed on all helicopter blades is linearly distributed along each blade and is the ...
Akkerman, Remko +6 more
core +5 more sources
Recycled tire rubber as reinforcement for erosion‐resistant epoxy composites
Polymer Engineering &Science, Volume 65, Issue 3, Page 1386-1403, March 2025.Recycled tire rubber as reinforcement for erosion‐resistant epoxy composites. Abstract The aim of the study was to develop environmentally friendly, low‐cost, and highly erosion‐resistant composites using rubber particles recycled from waste tires as reinforcement.
Orkan Baran Korkusuz +2 more
wiley +1 more source
The use of active controls to augment rotor/fuselage stability [PDF]
, 1985 The use of active blade pitch control to increase helicopter rotor/body damping is studied. Control is introduced through a conventional nonrotating swashplate. State variable feedback of rotor and body states is used.
Straub, F. K., Warmbrodt, W.
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Estimation of rotor aerodynamics using blade element theory [PDF]
INCAS BulletinThis paper presents a detailed analysis of the Blade Element Theory (BET) as applied to the aerodynamic performance of propellers and rotor systems. BET, a low-fidelity but widely used method, models the rotor blade as a series of independent elements ...
Andra-Ana-Maria GHEORGHIU +4 more
doaj +1 more source
A Case of Penetrating Head Wound Due to Helicopter Rotor Blade Injury in a 34-Year-Old Naval Helicopter Pilot Who Returned to Active Service 5 Years Later. [PDF]
Am J Case Rep, 2021 Hsieh CC +6 more
europepmc +1 more source