Comparison of a coupled near- and far-wake model with a free-wake vortex code [PDF]
Wind Energy Science, 2017 This paper presents the integration of a near-wake model for trailing vorticity, which is based on a prescribed-wake lifting-line model proposed by Beddoes(1987), with a blade element momentum (BEM)-based far-wake model and a 2-D shed vorticity model.
G. Pirrung +4 more
doaj +4 more sources
Free-vortex models for wind turbine wakes under yaw misalignment – a validation study on far-wake effects [PDF]
Wind Energy Science, 2023 Near-wake effects of wind turbine models using the free-vortex wake have been studied extensively, but there is a lack of validation for such predictions in the mid to far wake.
M. J. van den Broek +5 more
doaj +6 more sources
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
Adjoint optimisation for wind farm flow control with a free-vortex wake model
Renewable Energy, 2022 Wind farm flow control aims to improve wind turbine performance by reducing aerodynamic wake interaction between turbines. Dynamic, physics-based models of wind farm flows have been essential for exploring control strategies such as wake redirection and dynamic induction control.
Maarten J van den Broek +2 more
exaly +5 more sources
A Simplified Free Vortex Wake Model of Wind Turbines for Axial Steady Conditions
Applied Sciences, 2018 A simplified free vortex wake (FVW) model called the vortex sheet and ring wake (VSRW) model was developed to rapidly calculate the aerodynamic performance of wind turbines under axial steady conditions.
Bofeng Xu +4 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
Comparative Study of Coaxial Main Rotor Aerodynamics at Forward Flight Based on Free Wake Model and Unsteady ReynoldsAveraged Navier–Stokes Method [PDF]
Journal of Aerospace Technology and Management, 2022 This paper is dedicated to the numerical modeling of the aerodynamic characteristics of the full-scale coaxial main rotor. The modes of forward flight in the range of values V = 30−60 m∙s–1 (108−216 km∙h–1) have been under consideration.
Sergey Gennadievich Konstantinov +4 more
doaj +1 more source
AerospaceThe aim of the present work is the improvement of a free-wake model for the analysis of a small-scale two-bladed propeller in hover. The simulations are carried out using a BEM approach implemented in the medium-fidelity solver RAMSYS.
Manuel Iannotta +5 more
doaj +3 more sources
Comparative Study of Coaxial Main Rotor Aerodynamics in the Hover with the Usage of Two Methods of Computational Fluid Dynamics [PDF]
Journal of Aerospace Technology and Management, 2021 The paper is focused on numerical modeling of the aerodynamic characteristics of a full-scale coaxial main rotor in hover. The simulation was performed using two approaches of computational fluid dynamics (CFD): the original free wake model (FWM ...
Sergey Gennadievich Konstantinov +3 more
doaj +1 more source
Numerical Study of Coaxial Main Rotor Aerodynamics in Steep Descent
Aerospace, 2022 Numerical studies of the aerodynamic characteristics of the coaxial main rotor of the Kamov Ka-32 helicopter in steep descent modes, including the area of the vortex ring state (VRS) modes, have been performed.
Pavel Makeev +2 more
doaj +1 more source