Results 11 to 20 of about 74,669 (264)
Effect of Blade Tip Configurations on the Performance and Vibration of a Lift-Offset Coaxial Rotor
Aerospace, 2023 This present study investigates the effect of blade tip configurations, such as the sweepback angle and anhedral angle, on the performance and hub vibratory loads for the lift-offset coaxial rotor of a 30,000-pound-class high-speed long-range utility ...
Yu-Been Lee, Jae-Sang Park
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Study on the Mechanism of the Variable-Speed Rotor Affecting Rotor Aerodynamic Performance
Applied Sciences, 2018 The variable-speed rotor has proven to be a promising means to improve helicopter performance. Previous investigations on the aeromechanics of the variable-speed rotor are scarce.
Jiayi Xie +3 more
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Shock and Vibration, 2011 An active control method utilizing the multiple trailing edge flap configuration for rotorcraft vibration suppression and blade loads control is presented.
Uğbreve;ur Dalli +1 more
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Performance Investigation of Savonius Hydrokinetic Rotor with Novel Blades Featuring Surface Square Collars and Rectangular Edge Waves [PDF]
Journal of Applied Fluid MechanicsThe current work's objective is to investigate how the Savonius rotor performs in relation to the surface square collars and rectangular waves. The experimental study was carried out for three different blade profiles: conventional semicircular blade ...
J. S. Patel, V. Rathod, V. Patel
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Dynamic Modeling and Vibration Characteristics for a High-Speed Aero-Engine Rotor with Blade Off
Applied Sciences, 2021 Blade off that occurs during operation will generate a sudden imbalance excitation and make the rotor become inertially asymmetric, which leads to large instantaneous impact load and induces more complex rotor dynamic phenomena.
Longkai Wang +4 more
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IET Networks, EarlyView., 2022 Abstract 3D scanning is rapidly becoming a key maintenance tool. Aerospace was a pioneer in adopting 3D scanning technology because aircraft manufacture and maintenance require precision. Monitoring deterioration, removing components for maintenance, and verifying covert operations are not practical or helpful without technology.
T. Nanthakumaran Thulasy +4 more
wiley +1 more source
Effects of blade section on performance of butterfly wind turbines as double-blade VAWTs
Journal of Fluid Science and Technology, 2015 A butterfly wind turbine (BWT) is a kind of vertical axis wind turbine (VAWT) with closed-loop blades. These blades form a double-blade structure, which is expected to improve self-starting properties and reduce energy costs because of their simple ...
Yutaka HARA +6 more
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Shock and Vibration, 2021 In the modern turbo-machinery, reducing the clearance between the blade tip and casing inner face is an effective method to improve the power performance, but the clearance reduction leads to increased risk of blade-casing rubbing. In this paper, a blade-
Xin Lu, Jie Tang, Liwen Wang
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Influence of blade aerodynamic model on prediction of helicopter rotor aeroacoustic signatures [PDF]
, 2011 Brown’s vorticity transport model has been used to investigate how the local blade aerodynamic model influences the quality of the prediction of the high-frequency airloads associated with blade–vortex interactions, and thus the accuracy with which the ...
Boyd D. D. +14 more
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Научный вестник МГТУ ГА, 2018 The efficiency of the helicopter main rotor in the hover mode is very important, because this mode essentially determines the performance characteristics of the helicopter.
Y. M. Ignatkin +2 more
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