Paint it black: Efficacy of increased wind turbine rotor blade visibility to reduce avian fatalities
Sign Up to like & getrecommendations! Published in 2020 at "Ecology and Evolution"
DOI: 10.1002/ece3.6592
Abstract: Abstract As wind energy deployment increases and larger wind‐power plants are considered, bird fatalities through collision with moving turbine rotor blades are expected to increase. However, few (cost‐) effective deterrent or mitigation measures have so… read more here.
Keywords: wind; paint black; visibility; rotor ... See more keywords
Shape optimization of energy storage flywheel rotor
Sign Up to like & getrecommendations! Published in 2017 at "Structural and Multidisciplinary Optimization"
DOI: 10.1007/s00158-016-1516-0
Abstract: A flywheel plays an important role in storing energy in modern machine systems. Flywheels can store rotational energy at a high rotating speed and have the ability to deliver a high output power if the… read more here.
Keywords: energy; energy storage; rotor; geometry ... See more keywords
On determining the optimal shape, speed, and size of metal flywheel rotors with maximum kinetic energy
Sign Up to like & getrecommendations! Published in 2021 at "Structural and Multidisciplinary Optimization"
DOI: 10.1007/s00158-021-02935-x
Abstract: Flywheel energy storage systems (FESS) are devices that are used in short duration grid-scale energy storage applications such as frequency regulation and fault protection. The energy storage component of the FESS is a flywheel rotor,… read more here.
Keywords: rotor; speed; energy storage; shape ... See more keywords
An asymptotic approximation of the magnetic field and forces in electrical machines with rotor eccentricity
Sign Up to like & getrecommendations! Published in 2017 at "Electrical Engineering"
DOI: 10.1007/s00202-017-0512-8
Abstract: In this contribution, a systematic asymptotic derivation of approximate solutions to the magnetic field problem in rotating electric machines with an eccentrically running rotor is proposed. It is consistent with the well-known permeance harmonic method… read more here.
Keywords: approximation magnetic; approximation; rotor; asymptotic approximation ... See more keywords
A survey on a novel double-rotor spoke-type permanent magnet induction generator employing bridged and bridgeless structures
Sign Up to like & getrecommendations! Published in 2021 at "Electrical Engineering"
DOI: 10.1007/s00202-021-01352-z
Abstract: Double-turbine systems offer a higher capability of wind energy conversion compared to single-turbine systems. Therefore, in order to improve the performance of double-turbine systems and eliminate mechanical gearbox systems by utilizing the direct-drive concept, a… read more here.
Keywords: rotor; permanent magnet; double turbine; generator ... See more keywords
Blade tip vortex measurements on actively twisted rotor blades
Sign Up to like & getrecommendations! Published in 2017 at "Experiments in Fluids"
DOI: 10.1007/s00348-017-2312-3
Abstract: Active rotor control concepts, such as active twist actuation, have the potential to effectively reduce the noise and vibrations of helicopter rotors. The present study focuses on the experimental investigation of active twist for the… read more here.
Keywords: vortex; rotor; blade tip; active twist ... See more keywords
Flowfield measurements of reverse flow on a high advance ratio rotor
Sign Up to like & getrecommendations! Published in 2018 at "Experiments in Fluids"
DOI: 10.1007/s00348-018-2638-5
Abstract: One challenge that plagues the high-speed operation of rotorcraft is the inherent increase in size of the reverse flow region on the retreating side of the rotor disk. The present work experimentally investigated a portion… read more here.
Keywords: reverse flow; flow region; rotor; flow ... See more keywords
Characterization of a canonical helicopter hub wake
Sign Up to like & getrecommendations! Published in 2018 at "Experiments in Fluids"
DOI: 10.1007/s00348-018-2655-4
Abstract: The current study investigates the long-age wake behind rotating helicopter hub models composed of geometrically simple, canonical bluff-body shapes. The models consisted of a 4-arm rotor mounted on a shaft above a 2-arm (scissor) rotor… read more here.
Keywords: helicopter hub; phase; revolution; rotor ... See more keywords
Bifurcation analysis of a rigid-rotor squeeze film damper system with unsymmetrical stiffness supports
Sign Up to like & getrecommendations! Published in 2017 at "Archive of Applied Mechanics"
DOI: 10.1007/s00419-017-1254-9
Abstract: This paper is focused on the relationship between rigid body translation and rigid body precession in a squeeze film damper–rigid-rotor system with unsymmetrical stiffness supports. Two cases are considered: the precession motion non-resonance and internal… read more here.
Keywords: motion; squeeze film; system; film damper ... See more keywords
New crack breathing mechanism under the influence of unbalance force
Sign Up to like & getrecommendations! Published in 2018 at "Archive of Applied Mechanics"
DOI: 10.1007/s00419-017-1312-3
Abstract: In this paper, a new analytical model (unbalanced one), which considers the coupling effects of unbalance force, rotor weight, and rotor physical and dimensional properties, is developed to study the actual breathing mechanisms of the… read more here.
Keywords: crack breathing; model; rotor; unbalance force ... See more keywords
Nonlinear dynamic behaviors of a bolted joint rotor system supported by ball bearings
Sign Up to like & getrecommendations! Published in 2019 at "Archive of Applied Mechanics"
DOI: 10.1007/s00419-019-01585-2
Abstract: A dynamic model of the rotor-bearing system with bolted joint structure is set up based on the Lagrange’s equations, which considers the bearing clearance, the gyroscopic effect and the initial deformation due to the non-uniform… read more here.
Keywords: rotor; system; bearing clearance; rotor system ... See more keywords