Results 11 to 20 of about 314,370 (260)
Aerodynamic Performance of a Coaxial Hex-Rotor MAV in Hover
Aerospace, 2021 Micro aerial vehicles (MAVs) usually suffer from several challenges, not least of which are unsatisfactory hover efficiency and limited fly time. This paper discusses the aerodynamic characteristics of a novel Hex-rotor MAV with a coaxial rotor capable ...
Yao Lei, Jiading Wang, Wenjie Yang
doaj +3 more sources
Axial Spacing Effects on Rotor-Rotor Interaction Noise and Vibration in a Contra-Rotating Fan
International Journal of Aerospace Engineering, 2019 Because of the potential technical advantages, the contra-rotation technology has become a renewed interest in aviation and other applications. Contra-rotation increases efficiency in comparison with the single-rotor design, but this advantage is not ...
Hengxuan Luan +4 more
doaj +2 more sources
Aeroacoustic analysis of main rotor and tail rotor interaction [PDF]
, 2008 The increased restrictions placed on helicopter noise levels over recent decades have encouraged manufacturers to better understand tail rotor noise and its aerodynamic sources.
Fletcher, Timothy M. +5 more
core +13 more sources
Kicked rotor in Wigner phase space [PDF]
Fortschritte der Physik, 2003 AbstractWe develop the Wigner phase space representation of a kicked particle for an arbitrary but periodic kicking potential. We use this formalism to illustrate quantum resonances and anti‐resonances.
Bienert, M. +3 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. +5 more
core +10 more sources
Kicked-rotor quantum resonances in position space [PDF]
Physical Review A, 2008 5 figures, format RevTeX ...
Lepers, Maxence +2 more
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Simulating wind turbine interactions using the vorticity transport equations [PDF]
, 2009 The aerodynamic interactions that can occur within a wind farm result in the constituent turbines generating a lower power output than would be possible if each of the turbines were operated in isolation.
Fletcher, Timothy M., Brown, R.E.
core +3 more sources
Optimization of aerodynamic performance for co-axial rotors with different rotor spacings [PDF]
International Journal of Micro Air Vehicles, 2018 In this article, attempts are made to study the aerodynamic performance of co-axial rotors with different rotor spacings in hover. A custom-designed experimental platform with seven rotor spacings ( z/D = 0.16, 0.19, 0.23, 0.26, 0.29, 0.33 and 0.38) is applied to measure the hover performance, i.e.
Yao Lei, Yuxia Ji, Changwei Wang
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New inequalities for rotor frames in Hilbert space [PDF]
Journal of Mathematical Inequalities, 2020 Authors study the rotor frames in a Hilbert space. They use the rotation operator and establish an identity in case of a Weyl-Heisenberg frame. They provide a characterization of such a frame using the rotation operator and a reconstruction technique of a signal is provided too.
Pillai, K. Raju, Palaniammal, S.
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Influence of lateral rotor spacing on the benefits in power generated by multi-rotor configurations
Journal of Physics: Conference Series, 2022 In this work, an analysis of the rotor wakes interaction for different array configurations of onshore wind turbines, has been made using CENER’s in-house aerodynamic module, called AeroVIEW. The study focuses on how the distance between rotors affects the increases in power and thrust obtained by configurations with more than one laterally aligned ...
Raquel Martín-San-Román +3 more
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