Results 21 to 30 of about 372,323 (311)

A Magnus Wind Turbine Power Model Based on Direct Solutions Using the Blade Element Momentum Theory and Symbolic Regression [PDF]

, 2017
A model of the power coefficient of a mid-scale Magnus wind turbine using numerical solutions of the Blade Element Momentum Theory and symbolic regression is presented. A direct method is proposed for solving the nonlinear system of equations which govern
Calderón-Muñoz, William, Castillo, Pablo, LeBoeuf, Richard, Richmond-Navarro, Gustavo   +3 more
core   +1 more source

Analysis of Structural Responses of a Horizontal Axis Wind Turbine at Maximum Aerodynamic Performance [PDF]

Journal of Applied and Computational Mechanics
This numerical analysis investigates the interplay between fluid dynamics and structural mechanics within a horizontal axis wind turbine. Tip speeds ranging from 1 to 8.1 are explored, focusing on blade structural responses at maximum aerodynamic ...
Ahmed TAIBAOUI, Tahar BENMESSAOUD, Cheikh KEZRANE   +2 more
doaj   +1 more source

An Axial Hydro-Kinetic Turbine for Optimum Power Extraction Using Tidal Dams [PDF]

Iranica Journal of Energy and Environment, 2018
The present paper describes analytical optimization and numerical simulation of a modern hydro-kinetic turbine. It was a tidal turbine with twin elliptic-rotors. The turbines were installed within the twin ducts inside of a tidal dam.
A. Zahedi Nejad, P. Zahedi Nejad
doaj   +1 more source

On the ill-conditioning of the combined wind speed estimator and tip-speed ratio tracking control scheme

Journal of Physics: Conference Series, 2022
Abstract In recent years, industrial controllers for modern wind turbines have been designed as a combined wind speed estimator and tip-speed ratio (WSE-TSR) tracking control scheme. In contrast to the conventional and widely used Kω 2 torque control strategy, the WSE-TSR scheme provides flexibility in terms of ...
Brandetti, L. (author), Liu, Y. (author), Mulders, S.P. (author), Ferreira, Carlos (author), Watson, S.J. (author), van Wingerden, J.W. (author)   +5 more
openaire   +3 more sources

Effect of the Reynolds number on the performance and approximate modeling of the small straight-bladed vertical-axis wind turbine

Journal of Fluid Science and Technology, 2016
Effect of the Reynolds number on the torque and power characteristics of a small straight-bladed vertical axis wind turbine has been investigated experimentally under various wind velocity.
Seiji YAMADA, Tomohiro TAMURA, Shinsuke MOCHIZUKI   +2 more
doaj   +1 more source

General momentum theory for wind turbines at low tip speed ratios

Wind Energy, 2010
ABSTRACTGeneral momentum theory is used to study the behaviour of the ‘classical’ free vortex wake model of Joukowsky. This model has recently attained considerable attention as it shows the possibility of achieving a power performance that greatly exceeds the Lanchester‐Betz limit for rotors running at low tip speed ratios. This behaviour is confirmed
Jens N. Sørensen, Gijs A. M. van Kuik
openaire   +1 more source

The Effect of Leading-Edge Wavy Shape on the Performance of Small-Scale HAWT Rotors

Energies, 2023
The purpose of this experimental work was to investigate the role of the leading-edge wavy shape technique on the performance of small-scale HAWT fixed-pitch rotor blades operating under off-design conditions.
Riad Morina, Yahya Erkan Akansu
doaj   +1 more source

Study the effect of suction flow control on the aerodynamic performance of a wind turbine using 2D section numerical Results [PDF]

مهندسی مکانیک شریف, 2021
In the present work, the numerical investigation of a wind turbine airfoil with suction flow control is initially performed to find the relative improvement in its erodynamic efficiency. Consequently the study of turbine performance is accomplished using
M. Asghari, S. Karimian Aliabadi, M. Y. Hashemi   +2 more
doaj   +1 more source

Effect of Macroscopic Turbulent Gust on the Aerodynamic Performance of Vertical Axis Wind Turbine

Energies, 2023
Vertical Axis Wind Turbines (VAWTs) have proven to be suitable for changing wind conditions, particularly in urban settings. In this paper, a 2D URANS (Unsteady Reynolds-Averaged Navier Stokes) numerical analysis is employed for an H-Darrieus VAWT.
Lakshmi Srinivasan, Nishanth Ram, Sudharshan Bharatwaj Rengarajan, Unnikrishnan Divakaran, Akram Mohammad, Ratna Kishore Velamati   +5 more
doaj   +1 more source

Understanding the effects of rotation on the wake of a wind turbine at high Reynolds number

Flow
The wake of a horizontal-axis wind turbine was studied at a Reynolds number of $Re_D=4\times 10^6$ with the aim of revealing the effects of the tip speed ratio, $\lambda$ , on the wake.
Alexander Piqué, Mark A. Miller, Marcus Hultmark   +2 more
doaj   +1 more source