Results 1 to 10 of about 66 (50)

Seismic response of floating wind turbines due to seaquakes

open access: yesWind Energy, Volume 26, Issue 2, Page 145-162, February 2023., 2023
Abstract Vertical seismic waves, which are primarily due to pressure waves in the ground, can propagate with the same intensity in the seawater and impact floating bodies such as floating wind turbines (FWTs). Part of this wave can further propagate in the tower and generate large vertical accelerations in the nacelle. This paper presents a methodology
Amir M. Kaynia   +3 more
wiley   +1 more source

Fault‐tolerant individual pitch control of floating offshore wind turbines via subspace predictive repetitive control

open access: yesWind Energy, Volume 24, Issue 9, Page 1045-1065, September 2021., 2021
Abstract Individual pitch control (IPC) is an effective and widely used strategy to mitigate blade loads in wind turbines. However, conventional IPC fails to cope with blade and actuator faults, and this situation may lead to an emergency shutdown and increased maintenance costs.
Yichao Liu   +5 more
wiley   +1 more source

Numerical simulation of acoustic scattering and flow-induced noise with sharp interface immersed boundary method

open access: yes, 2020
High efficient and quiet propulsion of flying and swimming animals promotes the investigations on acoustic scattering and flow-induced noise.
Zhang T, Zhao C, Dong HB, Yang Y(杨焱)
core   +2 more sources

Prediction and control of sound propagation in turbofan engine bypass ducts [PDF]

open access: yes, 2007
This thesis contains original research into the propagation of sound in acoustically lined ductswith flow. The motivation for this work is the requirement to predict the sound attenuation ofacoustic liners in the bypass duct of modern turbofan ...
Brooks, Christopher James
core   +1 more source

Multi-Size-Mesh, Multi-Time-Step Algorithm for Noise Computation on Curvilinear Meshes [PDF]

open access: yes, 2013
Aeroacoustic problems are often multi-scale and a zonal refinement technique is thus desirable to reduce computational effort while preserving low dissipation and low dispersion errors from the numerical scheme.
CORRE, Christophe   +3 more
core   +1 more source

The acoustics of curved and lined cylindrical ducts with mean flow [PDF]

open access: yes, 2010
This thesis considers linear perturbations to the steady flow of a compressible inviscid perfect gas along a cylindrical or annular duct. Particular consideration is given to the model of the duct boundary, and to the effect of curvature of the duct ...

core   +2 more sources

A: Universality in Vortex Formation. B: Evaluation of Mach Wave Radiation Mechanisms in a Supersonic Jet [PDF]

open access: yes, 2000
In this thesis two distinct features of coherent structures are investigated. In Part I a model for the pinch-off process in vortex ring formation is developed.
Mohseni, Kamran
core   +1 more source

A Structured Techno‐Economic and Socio‐Regulatory Comparison of Onshore, Fixed‐Bottom Offshore, and Floating Offshore Wind Energy Systems

open access: yesInternational Journal of Energy Research, Volume 2026, Issue 1, 2026.
Onshore, fixed‐bottom offshore, and floating offshore wind turbines (FOWTs) represent distinct technological pathways for large‐scale wind energy deployment, yet comparative assessments often emphasize descriptive characteristics rather than quantified performance trade‐offs.
Mohsin Ali Koondhar   +7 more
wiley   +1 more source

Shape Morphing Programmable Systems for Enhanced Control in Low‐Velocity Flow Applications

open access: yesAdvanced Intelligent Systems, Volume 7, Issue 11, November 2025.
A soft, Lorentz‐force‐driven programmable surface enables rapid, reversible shape morphing for active flow control. Integrating experimental, numerical, and modeling approaches, the system demonstrates effective modulation of near‐wall flow and momentum at low velocities, offering pathways for bio‐inspired aerodynamics and natural locomotion emulation.
Jin‐Tae Kim   +16 more
wiley   +1 more source

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