Results 21 to 30 of about 75,283 (262)
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
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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 +2 more
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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
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Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2017 The most primitive control method of wind turbines used to generate electric energy from wind is the fixed speed control method. With this method, it is not possible that turbine input power is transferred to grid at maximum rate.
Murat Karabacak +4 more
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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 +2 more
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Understanding the effects of rotation on the wake of a wind turbine at high Reynolds number
FlowThe 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 +2 more
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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 +5 more
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Wind-tunnel modelling of the tip-speed ratio influence on the wake evolution
Journal of Physics: Conference Series, 2016 Wind-tunnel measurements on the near-wake evolution of a three bladed horizontal axis wind turbine model (HAWT) in the scale 1:O(350) operating in uniform flow conditions and within a turbulent boundary layer at different tip speed ratios are presented.
Victor P. Stein, Hans-Jakob Kaltenbach
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Effects of the Shock Wave Structure on the Tip Clearance Leakage Flow in Transonic Compressor Rotors
International Journal of Aerospace Engineering, 2023 The interaction between shock waves and the tip clearance flow in a transonic compressor rotor has important effects on the tip clearance flow and the rotor aerodynamic performance.
Xinlong Ye, Zhenggui Zhou
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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
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