Results 21 to 30 of about 4,258 (219)
Computational studies of the rotors aerodynamic characteristics of multirotor drones
Научный вестник МГТУ ГА, 2021 The article presents the results of computational studies of aerodynamic characteristics for unmanned lift-generating multi-rotor drones of various configurations. The distinctive features of rotors flow were characterized.
K. G. Kosushkin +2 more
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Design Aspects of Conical Coaxial Magnetic Gears
Energies, 2023 In this paper, a new design of a conical coaxial magnetic gear was proposed. Conical magnetic gears are considered a logical link between the radial- and axial-field coaxial designs.
Valentin Mateev +2 more
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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
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An Analytical Method for Coaxial Helicopter Ground Resonance [PDF]
MATEC Web of Conferences, 2020 A time-frequency analytical method is presented to analyze physical mechanism of coaxial helicopter ground resonance. Eigenvalue calculation and numerical integration of disturbance equations of motions are used to obtain modal characters and time-domain
Liu Xiangyi +4 more
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Applied Sciences, 2023 In this paper, a computational fluid dynamics simulation method is developed to study the influence of the rotor overlapping azimuth on the aerodynamic performance of compound coaxial helicopter.
Liang Li +4 more
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Unsteady loads for coaxial rotors in forward flight computed using a vortex particle method [PDF]
, 2018 Recent advances in coaxial rotor design have shown benefits of this configuration. Nevertheless, issues related to rotor-head drag, aerodynamic performance, wake interference, and vibration should also be considered.
Barakos, George +2 more
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Torque ripple investigation in coaxial magnetic gears [PDF]
MATEC Web of Conferences, 2022 Magnetic gears offer significant advantages such as low noise and vibration level, lower maintenance and higher reliability compared to mechanical gears and are suitable for many applications in the industry.
Tzouganakis Panteleimon +5 more
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Aviation, 2022 Due to its compactness, agility, good hover performance, and ease of carriage, coaxial rotor Mini UAV is apt for various military and civilian applications in mountain terrain.
Ramesh P. S., Jeyan J. V. Muruga Lal
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Aerodynamic analysis and modeling of coaxial ducted fan aircraft with the ceiling effect
Engineering Applications of Computational Fluid Mechanics, 2021 In this study, a novel coaxial ducted aircraft structure is considered, based on which the flow field with the ceiling effect under different vertical velocities and heights is obtained by exploiting the CFD (Computational Fluid Dynamics) numerical ...
Tianfu Ai +5 more
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Aerospace, 2023 A numerical method is used to evaluate the influence of propeller parameters on the aerodynamic performance of shrouded coaxial dual rotors in hover. Compared with the open-rotor configuration, the shrouded rotors reduce the tip vortex, resulting in a ...
Hangwen Zhang +3 more
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