As a continuation of authors’ previous work, this work extends and hackles the numerical method for wind turbine wakes based on vortex method, proposes Lagrangian actuator model (LAM) which is used representation rotor under Lagarangian framework. This paper provides two examples LAM, line (LAL) disc (LAD) model, constructs matching methods wake predictions respectively. Those have high computa...

Wind velocity distribution and the vortex around the wind turbine present a significant challenge in the development of straight-bladed vertical axis wind turbines (VAWTs). This paper is intended to investigate influence of tip vortex on wind turbine wake by Computational Fluid Dynamics (CFD) simulations. In this study, the number of blades is two and the airfoil is a NACA0021 with chord length...

This paper studies the relationship between unsteady flow features and instantaneous torque and power performance of straight bladed vertical axis wind turbine at variable tip speed ratios. The rotor unsteady flow field simulation was carried out by using computational fluid dynamics method. The flow physics and the principle of changing flow filed acting on torque performance and power perform...

An inviscid double wake model based on a steady two-dimensional panel method has been developed to predict aerodynamic loads of wind turbine airfoils in the deep stall region. The separated flow is modelled using two constant vorticity sheets which are released at the trailing edge and at the separation point. A calibration of the code through comparison with experiments has been performed usin...

Wind farm micro-siting is a complex process that requires multidisciplinary analysis and optimization. The problem consists not only of positioning the wind turbines in the locations within the site that have the most wind energy potential, but also it has to minimize wake interference between turbines. This means that usually the sum of the expected isolated turbines is less than the actual pe...

Abstract. In this paper we investigate symmetry-preserving boundary conditions for a fourth-order symmetry-preserving finite volume method, to able to do accurate turbulence simulations for wind-turbine wake applications. It is found that the use of Dirichlet conditions limits the fourth-order method to (at most) second order. However, on properly chosen non-uniform grids, fourth-order behavior...

Abstract In recent years dynamic induction control has shown great potential in reducing wake-to-turbine interaction by increasing the mixing wake. With these wake methods thrust force will vary time. If applied to a floating offshore wind turbine, it cause platform move. this paper effect of Helix approach on DTU10MW turbine TripleSpar and its is evaluated. When at Strouhal equal 0.25, yaw mov...

Wind energy is a rapidly expanding source of renewable energy, but is highly intermittent. The performance of a wind farm, composed of a collection of wind turbines, depends not only on the placement of wind turbines in a farm, but also control actions taken by individual turbines. The wind turbine placement (layout) design problem involves adjusting turbine locations within a given area to imp...