Results 231 to 240 of about 75,457 (257)

Evaluation of the MPPT performance in small wind turbines by estimating the tip-speed ratio

2013 48th International Universities' Power Engineering Conference (UPEC), 2013
In this paper, a method for online estimation of the tip speed ratio (TSR) of small wind turbines is presented, in order to evaluate the MPPT performance. Unlike obvious methods, for which an encoder or resolver is needed, the presented method only requires measurements of the wind speed and the generator current. Firstly, the accuracy of the presented
Louis F. M. Gevaert, Jeroen D. M. De Kooning, Tine L. Vandoorn, Jan Van de Vyver, Lieven Vandevelde   +4 more
openaire   +1 more source

Cylindrical Vortex Model of a Rotor of Finite or Infinite Tip-Speed Ratios

2017
A simple vortex model of a rotor with infinite number of blades and constant circulation is presented in this chapter. The model consists of a root vortex, a right semi-infinite vortex cylinder of tangential and longitudinal vorticity, and a bound vortex disk (actuator disk) of radial vorticity. This model was briefly presented in Sect. 5.2.3 The model
openaire   +1 more source

Experimental and Numerical Studies of a High Solidity, Low Tip Speed Ratio DAWT

48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, 2010
A numerical and experimental investigation of a Diffuser Augmented Wind Turbine (DAWT) has been conducted. Historically, the advantages of DAWT concept have been negated by higher material cost and less than stellar real world performance. The current configuration combines a duct augmentation concept with an optimized, high solidity, twisted flat ...
Michael Moeller, Kenneth Visser
openaire   +1 more source

Tool-tip dynamics in micromachining with arbitrary tool geometries and the effect of spindle speed

International Journal of Machine Tools and Manufacture, 2023
Burak Ozdoganlar, Bekir Bediz, Shivang Shekhar   +2 more
exaly  

515 The influence of tip speed ratio on a Savonius rotor wake

The Proceedings of Ibaraki District Conference, 2006
Hiroaki FUJISHIMA, Eizi KATO, Tsutomu TAGHIKAWA   +2 more
openaire   +1 more source

Innovative design method and experimental investigation of a small-scale and very low tip-speed ratio wind turbine

Experimental Thermal and Fluid Science, 2022
Florent Ravelet, Martin Bourhis
exaly  

Effect of tip-speed ratio on induced velocities near a lifting rotor

2017
A theoretical investigation of the asymmetry of induced flow in the vicinity of a lifting rotor in forward flight has been conducted. The analysis is based upon an asymmetric wake which is a logical extension of that used for previous investigations. Equations for the induced velocities at an arbitrary point in space are presented in a form suitable ...
openaire   +1 more source

Influence of rotating speed on tip leakage vortex in a mixed flow pump as turbine at pump mode

Renewable Energy, 2020
Lei Tan, Yadong Han
exaly  

Effects of Tip Speed Ratios on the Blade Forces of a Small H-Darrieus Wind Turbine

Energies, 2021
Sajid Ali, Choon-Man Jang
exaly  

Tip wear and tip breakage in high-speed atomic force microscopes

Ultramicroscopy, 2019
Gaoliang Dai
exaly