Results 11 to 20 of about 571,229 (299)
Modelling the helicopter rotor aerodynamics at forward flight with free wake model and URANS method
Aviation, 2020 The presented work is dedicated to the numerical study of the aerodynamic characteristics of the helicopter rotor. Two approaches to modeling of the rotor are applied: the free wake model developed by the Authors with using steady airfoil characteristics
Yuri Ignatkin +3 more
doaj +3 more sources
Validation of the near wake of a scaled X-Rotor vertical-axis wind turbine predicted by a free-wake vortex model [PDF]
Wind Energy ScienceVertical-axis wind turbines (VAWTs) are gaining research attention in offshore energy due to their ability to operate in omnidirectional wind, the simpler design characteristics, and the potential for faster wake recovery.
A. Giri Ajay +2 more
doaj +4 more sources
Unsteady Lifting-Line Free-Wake Aerodynamic Modeling for Morphing Wings
AerospaceA time-stepping, lifting-line solution algorithm for the prediction of the unsteady aerodynamics of morphing wings is presented. The velocity induced by the wake vorticity is determined through a free-wake vortex-lattice model, whereas the Küssner and ...
Gregorio Frassoldati +3 more
doaj +2 more sources
Energies, 2023 This paper discusses how the incorporation of high-resolution ground coverage dataset ESA WorldCover into a wind flow field and wake simulation calculation, as well as the use of the coupled wake model for wind farm output simulation, can improve the ...
Jing Zhang +6 more
doaj +1 more source
A numerical study of tilt‐based wake steering using a hybrid free‐wake method
Wind Energy, 2020 This study investigates the potential of using tilt‐based wake steering to alleviate wake shielding problems experienced by downwind turbines. Numerical simulations of turbine wakes have been conducted using a hybrid free‐wake analysis combining vortex ...
Keye Su, Donald Bliss
doaj +1 more source
The Theoretical Research for the Rotor/Fuselage Unsteady Aerodynamic Interaction Problem
Journal of Aerospace Technology and Management, 2016 Based on coupled unsteady panel/free-wake method, a universal analysis model was established, which provides a good prediction for the rotor/fuselage unsteady aerodynamic interaction.
Liu Dawei, Xin Ji, Huang Jun
doaj +2 more sources
Aeroelastic loads on a 10 MW turbine exposed to extreme events selected from a year-long large-eddy simulation over the North Sea [PDF]
Wind Energy Science, 2021 In this article the aeroelastic loads on a 10 MW turbine in response to extreme events (low-level jet, shear, veer and turbulence intensity) selected from a year-long large-eddy simulation (LES) on a site at the North Sea are evaluated.
G. Schepers +4 more
doaj +1 more source
Validating BEM, Direct and Inverse Free Wake Models with the MEXICO Experiment. [PDF]
48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, 2010 The primary objective of the MEXICO (Model Experiments in Controlled Conditions) project was to generate experimental data for validation of models for wind turbines. Kulite©pressure sensors were used for pressure measurements while Particle Image Velocimetry was used with the aim of tracking the tip vortex trajectory.
Micallef, Daniel +5 more
openaire +3 more sources
Flow and air-entrainment around partially submerged vertical cylinders [PDF]
, 2019 In this study, a partially submerged vertical cylinder is moved at constant velocity through water, which is initially at rest. During the motion, the wake behind the cylinder induces free-surface deformation. Eleven cylinders, with diameters from $D=1.4$
Ageorges, Valentin +2 more
core +8 more sources
Flow, 2023 The importance of buoyancy relative to free-stream flow is described using an adapted Froude number $Fr' = U/f_0^{1/3}$, where $U$ is the flow speed and $f_0$ is the exhaust buoyancy flux per unit length.
Samuel Charlwood +2 more
doaj +1 more source