Results 11 to 20 of about 4,258 (219)
A comparison of coaxial and conventional rotor performance [PDF]
Journal of the American Helicopter Society, 2009 The performance of a coaxial rotor in hover, in steady forward flight, and in level, coordinated turns is contrasted with that of an equivalent, conventional rotor with the same overall solidity, number of blades, and blade aerodynamic properties.
Brown, Brown, Kim, Landgrebe, Newman
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Investigation of Rotor Efficiency with Varying Rotor Pitch Angle for a Coaxial Drone
Drones, 2022 Coaxial rotor systems are appealing for multirotor drones, as they increase thrust without increasing the vehicle’s footprint. However, the thrust of a coaxial rotor system is reduced compared to having the rotors in line.
Knut Erik Teigen Giljarhus +2 more
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Aeroacoustics of a coaxial rotor in level flight [PDF]
, 2008 The aeroacoustic characteristics of a coaxial system with teetering rotors in level forward °ight are com- pared to those of an equivalent articulated single rotor with the same solidity.
Brown, R.E., Duraisamy, K., Kim, H.W.
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ROCK FORMATION MILLING, USING COAXIAL ROTORS
Литьë и металлургия, 2012 The article describes the known and suggests a fundamentally new arrangements of the rotor’s central cutters.
A. S. Konoplyanik, V. V. Romanenya
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Loads Transfer Principles of Coaxial Helicopter Rotors [PDF]
Journal of the American Helicopter Society, 2023 The load transfer principles of coaxial rotors are analyzed from a theoretical point of view. The theoretical expressions of hub forces and moments are derived by summing the Fourier series of the root forces and moments from all the blades of a coaxial rotor system with the assumption that the rotor loads are identical between the two rotors.
Han, Dong, Barakos, George N.
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Aerodynamic Characteristics of a Hex-Rotor MAV With Three Coaxial Rotors in Hover [PDF]
IEEE Access, 2020 In order to study the aerodynamic characteristics of a Hex-rotor micro aerial vehicle (MAV) with different rotor spacing, both experiments and numerical simulations are performed in this paper. First of all, a series of aerodynamic parameters to characterize the hover performance of the Hex-rotor MAV are analyzed theoretically.
Yao Lei, Yiqiang Ye
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Development and justification of parameters of a microwave convective hop dryer [PDF]
E3S Web of Conferences, 2023 To solve the problem of low energy efficiency and the absence of small-sized hop dryers, a microwave convective continuous-flow hop dryer has been developed with reasonable parameters that allow preserving the consumer properties of hops.
Novikova G.V. +5 more
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Vibration loads analysis of coaxial rigid rotor in rotor interaction
Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University, 2021 A vibration load computing method for a coaxial rigid rotor was developed and applied to analyzing its vibration load in rotor interference. The structural dynamics model based on the medium-size deformation beam theory and the double-rotor aerodynamics model that contains unsteady free wake were jointly used to develop the coaxial rigid rotor's ...
Yu Zhihao +3 more
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Aerospace, 2023 This study develops a hybrid solver with reversed overset assembly technology (ROAT), a viscous vortex particle method (VVPM), and a CFD program based on the URNS method, in order to study the aerodynamic and acoustic characteristics of coaxial rigid ...
Yucheng Yang +3 more
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Comparative Study of Coaxial Main Rotor Aerodynamics in the Hover with the Usage of Two Methods of Computational Fluid Dynamics [PDF]
Journal of Aerospace Technology and Management, 2021 The paper is focused on numerical modeling of the aerodynamic characteristics of a full-scale coaxial main rotor in hover. The simulation was performed using two approaches of computational fluid dynamics (CFD): the original free wake model (FWM ...
Sergey Gennadievich Konstantinov +3 more
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