Journal ArticleDOI
Wind-tunnel and field investigation of the effect of local wind direction on speed-up over hills
TLDR
In this article, the authors measured flow past simulated sinusoidal hills in an ABLWT that modeled typical full-scale complex terrain for many wind turbine locations in the Altamont Pass, California, USA.About:
This article is published in Journal of Wind Engineering and Industrial Aerodynamics.The article was published on 2007-08-01. It has received 69 citations till now. The article focuses on the topics: Wind direction & Wind profile power law.read more
Citations
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Journal ArticleDOI
Wind speed parameters sensitivity analysis based on fractals and neuro-fuzzy selection technique
TL;DR: The neuro-fuzzy approach was used to detect the most important variables which affect the wind speed according to the fractal dimensions and the main goal was to investigate the influence of terrain roughness length and different heights of theWind speed prediction.
Journal ArticleDOI
Estimation of fractal representation of wind speed fluctuation by artificial neural network with different training algorothms
TL;DR: Artificial neural network with different training algorithms were used in order to estimate the wind speed fluctuation based on the fractal interpolation to improve the windspeed fluctuation estimation by soft computing methods.
Journal ArticleDOI
Cross axis wind turbine: Pushing the limit of wind turbine technology with complementary design
Wen Tong Chong,W.K. Muzammil,W.K. Muzammil,Kok Hoe Wong,Chin-Tsan Wang,Mohammed Gwani,Yung-Jeh Chu,S.C. Poh +7 more
TL;DR: In this paper, a cross-axis wind turbine with a 45° deflector was proposed to increase the power output and rotational speed of a conventional vertical axis wind turbine by 2.8 times higher than a conventional straight-bladed vertical axis turbine.
Journal ArticleDOI
Wind tunnel simulation of terrain effects on wind farm siting
Kjersti Røkenes,Per-Åge Krogstad +1 more
TL;DR: In this article, the turbulent flow above a generic terrain model has been investigated in a wind tunnel, where the rather large terrain model was split up into a set of smaller modules, which could be combined in various ways and consisted of features inspired by the mountainous terrain along the Norwegian coastline.
Journal ArticleDOI
On the exergetic capacity factor of a wind – solar power generation system
TL;DR: In this article, a detailed exergetic analysis aiming to identify the overall Exergetic Capacity Factor (ExCF) for a wind-solar power generation system was done.
References
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Book
Atmospheric Boundary Layer Flows: Their Structure and Measurement
J. C. Kaimal,John Finnigan +1 more
TL;DR: In this paper, Spectra and cospectra over flat uniform terrain, Flow over plant canopies and Flow over changing terrain are used to observe the boundary layer of a plant canopy.
Journal ArticleDOI
Turbulent wind flow over a low hill
P. S. Jackson,J. C. R. Hunt +1 more
TL;DR: In this article, an analytical solution for the flow of an adiabatic turbulent boundary layer on a uniformly rough surface over a two-dimensional hump with small curvature was presented for the limit L/y 0 → ∞ when h/L 2k2/ln(δ/y0) where L and h are the characteristic length and height of the hump, y0 the roughness length of the surface and δ the thickness of the boundary layer.
Journal ArticleDOI
Turbulent shear flows over low hills
TL;DR: In this paper, a general analysis is developed for turbulent shear flows over two and three-dimensional hills with low-slopes which allows for a wide range of upwind velocity profiles, such as those caused by wakes of up-wind hills, roughness changes, or changes in stratification.
Journal ArticleDOI
The Askervein Hill project: Overview and background data
Peter A. Taylor,H. W. Teunissen +1 more
TL;DR: The Askervein Hill project as mentioned in this paper was a collaborative study of boundary-layer flow over low hills carried out under the auspices of the International Energy Agency Programme of R & D on Wind Energy Conversion Systems.
Journal ArticleDOI
Flow over an isolated hill of moderate slope
P. J. Mason,R. I. Sykes +1 more
TL;DR: In this paper, a two-dimensional theory of Jackson and Hunt for turbulent flow over a shallow ridge is extended to three-dimensional topography and compared both with theoretical results for a ridge and with surface wind observations from a nearly circular isolated hill.
Related Papers (5)
Experimental study on roughness effects on turbulent boundary layer flow over a two-dimensional steep hill
Shuyang Cao,Tetsuro Tamura +1 more