LES Investigation of Terrain-Induced Turbulence in Complex Terrain and Economic Effects of Wind Turbine Control [PDF]
Energies, 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 +7 more sources
Numerical Investigation of Terrain-Induced Turbulence in Complex Terrain by Large-Eddy Simulation (LES) Technique [PDF]
Energies, 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 +6 more sources
New Assessment Scales for Evaluating the Degree of Risk of Wind Turbine Blade Damage Caused by Terrain-Induced Turbulence [PDF]
Energies, 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 +6 more sources
Characterization of Terrain-Induced Turbulence by Large-Eddy Simulation for Air Safety Considerations in Airport Siting [PDF]
Atmosphere, 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 +8 more sources
Numerical Investigation of Terrain-Induced Turbulence in Complex Terrain Using High-Resolution Elevation Data and Surface Roughness Data Constructed with a Drone [PDF]
Energies, 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 +6 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 [PDF]
Energies, 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 +6 more sources
Long-range transport of terrain-induced turbulence from high-resolution numerical simulations [PDF]
Atmospheric 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 +6 more sources
Effects of Terrain-Induced Turbulence on Wind Turbine Blade Fatigue Loads
Energy and Power Engineering, 2017 Recently, the issue has surfaced that the availability factors for wind farms built on complex terrain are lower than the originally projected values. In other words, problems have occurred such as extreme decreases in generation output, failures of components inside and outside wind turbines including yaw motors and yaw gears, and cracking on wind ...
Takanori Uchida
exaly +4 more sources
CFD analysis of terrain induced turbulence at Kristiansand airport, Kjevik
Aviation, 2013 The paper presents the finding of a study conducted in order to analyse the characteristics of flow in a real complex terrain in the vicinity of the Kristiansand Airport (Kjevik), Norway.
Adil Rasheed, Karstein Sørli
doaj +4 more sources
Reconstructing fine-scale 3D wind fields with terrain-informed machine learning [PDF]
Nature CommunicationsFine-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