Results 1 to 10 of about 787 (150)

Characterization of Terrain-Induced Turbulence by Large-Eddy Simulation for Air Safety Considerations in Airport Siting

open access: yesAtmosphere, 2022
Topography-induced turbulence poses a potential hazard for aviation safety, in particular during the final approach and landing. In this context, it is essential to assure that the impact of topography-induced turbulence on the flight paths during take ...
Sai Wang   +3 more
doaj   +3 more sources

LES Investigation of Terrain-Induced Turbulence in Complex Terrain and Economic Effects of Wind Turbine Control

open access: yesEnergies, 2018
In the present study, numerical wind simulation was conducted by reproducing the realistic topography near wind turbine sites with high spatial resolutions and using the Large-Eddy Simulation (LES) technique. The topography near wind turbine sites serves
Takanori Uchida
doaj   +3 more sources

New Assessment Scales for Evaluating the Degree of Risk of Wind Turbine Blade Damage Caused by Terrain-Induced Turbulence

open access: yesEnergies, 2019
The present study scrutinized the impacts of terrain-induced turbulence on wind turbine blades, examining measurement data regarding wind conditions and the strains of wind turbine blades. Furthermore, we performed a high-resolution large-eddy simulation
Takanori Uchida, Yasushi Kawashima
doaj   +3 more sources

Numerical Investigation of Terrain-Induced Turbulence in Complex Terrain by Large-Eddy Simulation (LES) Technique

open access: yesEnergies, 2018
In the present study, field observation wind data from the time of the wind turbine blade damage accident on Shiratakiyama Wind Farm were analyzed in detail.
Takanori Uchida
doaj   +3 more sources

Reconstructing fine-scale 3D wind fields with terrain-informed machine learning [PDF]

open access: yesNature Communications
Fine-scale near-surface wind field prediction is essential for a wide range of applications. However, most operational and AI-based weather models operate at kilometer-scale resolution, where terrain-induced wind features such as slope jets, flow ...
Chensen Lin   +6 more
doaj   +2 more sources

A Large-Eddy Simulation-Based Assessment of the Risk of Wind Turbine Failures Due to Terrain-Induced Turbulence over a Wind Farm in Complex Terrain

open access: yesEnergies, 2019
The first part of the present study investigated the relationship among the number of yaw gear and motor failures and turbulence intensity (TI) at all the wind turbines under investigation with the use of in situ data.
Takanori Uchida, Susumu Takakuwa
doaj   +3 more sources

Numerical Investigation of Terrain-Induced Turbulence in Complex Terrain Using High-Resolution Elevation Data and Surface Roughness Data Constructed with a Drone

open access: yesEnergies, 2019
Using the method based on unmanned aerial vehicle (UAV) imagery, two kinds of data can be obtained: the digital elevation model (DEM) for the digital expression of terrain, and the digital surface model (DSM) for the digital expression of the surface of ...
Takanori Uchida
doaj   +3 more sources

Spatiotemporal evolution and physical mechanism analysis of boundary layer wind characteristics of typhoon Saola [PDF]

open access: yesScientific Reports
This study investigated the spatiotemporal evolution of boundary-layer wind characteristics during Typhoon Saola over the Shenzhen and Hong Kong regions and its underlying physical mechanisms.
Jing Liang   +5 more
doaj   +2 more sources

Long-range transport of terrain-induced turbulence from high-resolution numerical simulations [PDF]

open access: yesAtmospheric Chemistry and Physics, 2011
Over complex terrain, an important question is how various topographic features may generate or alter wind turbulence and how far the influence can be extended downstream.
M. Katurji, S. Zhong, P. Zawar-Reza
doaj   +1 more source

Turbulence intensity footprints of built and natural environment as measured by anemometers at Hong Kong International Airport

open access: yesMeteorologische Zeitschrift, 2022
Terrain and building-induced low-level turbulence is studied in this paper. Data from six anemometers, respectively along the North and South Runways of Hong Kong International Airport, are analysed over the period of 2012 to 2018.
Henk W. Krüs   +2 more
doaj   +1 more source

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