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Wind resource assessment in heterogeneous terrain

Vanderwel, C., Placidi, M. and Ganapathisubramani, B. (2017) Wind resource assessment in heterogeneous terrain Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 375 (2091). pp. 1-14.

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High-resolution particle image velocimetry data obtained in rough-wall boundary layer experiments are re-analysed to examine the influence of surface roughness heterogeneities on wind resource. Two different types of heterogeneities are examined: (i) surfaces with repeating roughness units of the order of the boundary layer thickness (Placidi & Ganapathisubramani. 2015 J. Fluid Mech. 782, 541–566. (doi:10.1017/jfm.2015.552)) and (ii) surfaces with streamwise-aligned elevated strips that mimic adjacent hills and valleys (Vanderwel & Ganapathisubramani. 2015 J. Fluid Mech. 774, 1–12. (doi:10.1017/jfm.2015.228)). For the first case, the data show that the power extraction potential is highly dependent on the surface morphology with a variation of up to 20% in the available wind resource across the different surfaces examined. A strong correlation is shown to exist between the frontal and plan solidities of the rough surfaces and the equivalent wind speed, and hence the wind resource potential. These differences are also found in profiles of Ū2 and Ū3 (where U is the streamwise velocity), which act as proxies for thrust and power output. For the second case, the secondary flows that cause low- and high-momentum pathways when the spacing between adjacent hills is beyond a critical value result in significant variations in wind resource availability. Contour maps of Ū2 and Ū3

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
Vanderwel, C.
Ganapathisubramani, B.
Date : 13 April 2017
Funders : European Research Council (ERC), European Commission
DOI : 10.1098/rsta.2016.0109
Copyright Disclaimer : © 2017 The Author(s). Published by the Royal Society. All rights reserved.
Additional Information : This article is part of the themed issue ‘Wind energy in complex terrains’.
Depositing User : Clive Harris
Date Deposited : 17 Oct 2018 10:43
Last Modified : 17 Dec 2018 15:10

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