Results 1 to 10 of about 152,300 (313)

Design and initial testing of a one-bladed 30-meter-diameter rotor on the NASA/DOE mod-O wind turbine [PDF]

open access: yes
The concept of a one-bladed horizontal-axis wind turbine has been of interest to wind turbine designers for many years. Many designs and economic analyses of one-bladed wind turbines have been undertaken by both United States and European wind energy ...
Corrigan, R. D., Ensworth, C. B. F.
core   +1 more source

Markovian Behaviour and Constrained Maximization of the Entropy in Chaotic Quantum Systems

open access: yes, 2003
The separation of the Schr\"{o}dinger equation into a Markovian and an interference term provides a new insight in the quantum dynamics of classically chaotic systems.
A. Romanelli   +20 more
core   +1 more source

Tiltrotor CFD part I: validation [PDF]

open access: yes, 2017
This paper presents performance analyses of the model-scale ERICA and TILTAERO tiltrotors and of the full-scale XV-15 rotor with high-fidelity computational fluids dynamics.
Barakos, George N.   +2 more
core   +1 more source

Study on the Mechanism of Tooth Breakage Fault in Gear Rotor System Under Load Excitation

open access: yesJixie chuandong, 2020
The dynamics mechanism of the first-order gearbox and its connected two-span rotor system under load excitation and broken tooth fault is studied. Because of the time-varying meshing stiffness of gears and the unbalance of the rotor system, the coupling ...
Haihan Zhang, Fang Ren, Jinhao Feng
doaj  

A CFD study of tilt rotor flowfields [PDF]

open access: yes
The download on the wing produced by the rotor wake of a tilt rotor vehicle in hover is of major concern because of its severe impact on payload-carrying capability.
Fejtek, Ian, Roberts, Leonard
core   +1 more source

Modeling and analysis of nonlinear rotordynamics due to higher order deformations in bending [PDF]

open access: yes, 2011
A mathematical model incorporating the higher order deformations in bending is devel- oped and analyzed to investigate the nonlinear dynamics of rotors. The rotor system con- sidered for the present work consists of a flexible shaft and a rigid disk. The
Berlioz, Alain   +2 more
core   +3 more sources

Alternative Framework for Generator Coherency Analysis and Controlled-Islanding for Grids with High Penetration Levels of Inverter-Based Renewables

open access: yesABUAD Journal of Engineering Research and Development
The increasing integration of inverter-based renewable energy sources has significantly altered power system dynamics and reduced inertia. Identifying coherent generators in such low-inertia systems remains a major challenge due to the dynamic influence
Mbey Vincent   +3 more
doaj   +1 more source

A Brief Review on Dynamics of a Cracked Rotor

open access: yesInternational Journal of Rotating Machinery, 2009
Fatigue crack is an important rotor fault, which can lead to catastrophic failure if undetected properly and in time. Study and Investigation of dynamics of cracked shafts are continuing since last four decades.
Chandan Kumar, Vikas Rastogi
doaj   +1 more source

A study of helicopter stability and control including blade dynamics [PDF]

open access: yes
A linearized model of rotorcraft dynamics has been developed through the use of symbolic automatic equation generating techniques. The dynamic model has been formulated in a unique way such that it can be used to analyze a variety of rotor/body coupling ...
Curtiss, H. C., Jr., Zhao, Xin
core   +1 more source

Computational fluid dynamics model of a quad-rotor helicopter for dynamic analysis [PDF]

open access: yes, 2016
The control and performance of a quad-rotor helicopter UAV is greatly influenced by its aerodynamics, which in turn is affected by the interactions with features in its remote environment. This paper presents details of Computational Fluid Dynamics (CFD)
Bousbaine, Amar   +2 more
core   +2 more sources

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