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Gust structure and generation in canopy flows
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-3251-8328
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-1146-3241
2011 (English)In: European Wind Energy Conference and Exhibition 2011: EWEC 2011, 2011, 217-221 p.Conference paper, Published paper (Refereed)
Abstract [en]

Due to an increased demand to place wind turbines in forest areas it is of importance to know the details of the wind flow field over forest canopies. In this study we compare the flow characteristics of an atmospheric boundary layer over a forest canopy and a wind tunnel canopy model. Both the mean velocity distribution and the turbulence intensities were measured for both cases and the friction velocity was determined from the Reynolds shear stress above the edge of the canopy. The comparison between the two data sets is reasonably good, especially close to the canopy edge. The analysis of the time series of both measurement sets has highlighted that the turbulent canopy flow (in both wind tunnel and atmospheric data sets) is composed, beside the high frequency turbulence, by some flow structures detectable only through phase averages approaches.

Place, publisher, year, edition, pages
2011. 217-221 p.
Series
European Wind Energy Conference and Exhibition 2011, EWEC 2011
Keyword [en]
Atmospheric boundary layer, Canopy flow, Coherent structure, Wavelet analysis, Atmospheric data, Canopy model, Data sets, Flow characteristic, Forest area, Forest canopies, Friction velocity, High frequency, Mean velocity distribution, Measurement sets, Reynolds shear stress, Turbulence intensity, Exhibitions, Forestry, Wind power, Wind tunnels, Atmospheric movements, Forest Canopy, Power, Wind
National Category
Environmental Engineering
Identifiers
URN: urn:nbn:se:kth:diva-149760Scopus ID: 2-s2.0-84870152228ISBN: 9781618399915 (print)OAI: oai:DiVA.org:kth-149760DiVA: diva2:749279
Conference
European Wind Energy Conference and Exhibition 2011, EWEC 2011; Brussels; Belgium; 14 March 2011 through 17 March 2011
Note

QC 20140923

Available from: 2014-09-23 Created: 2014-08-27 Last updated: 2016-12-23Bibliographically approved

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Fransson, Jens H. M.Alfredsson, P. Henrik

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