Large eddy simulation study of a fully developed thermal wind-turbine array boundary layer

Marc Calaf, Charles Meneveau, Marc Parlange

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

6 Citations (Scopus)

Abstract

When wind turbines are arranged in large wind farms, their efficiency decreases significantly due to wake effects and to complex turbulence interactions with the atmospheric boundary layer (ABL) (Frandsen et al., 2006). For large wind farms whose length exceeds the ABL height by over an order of magnitude, a “fully developed” flow regime may be established (Frandsen et al., 2006; Calaf et al., 2010; Cal et al., 2010). In this asymptotic regime, the changes in the stream-wise direction are small compared to the more relevant vertical exchange mechanisms. Such a fully developed wind-turbine array boundary layer (WTABL) has recently been studied (Calaf et al., 2010) using Large Eddy Simulations (LES) under neutral stability conditions. The simulations showed the existence of two log-laws, one above (characterized by: uhi∗,zhiou∗hi,zohi ) and one below ( ulo∗,zloou∗lo,zolo ) the wind turbine region. This enabled the development of more accurate parameterizations of the effective roughness scale for a wind farm. Now, a suite of Large Eddy Simulations, in which wind turbines are modeled as in (Calaf et al., 2010) using the classical drag disk concept are performed, again in neutral conditions but also considering temperature. Figure 1 shows a schematic of the geometry of the simulation.
Original languageEnglish
Title of host publicationDirect and Large-Eddy Simulation VIII
PublisherSpringer
Pages239-244
Number of pages6
Volume15
ISBN (Print)9789400724815
DOIs
Publication statusPublished - 2011
Externally publishedYes
Event8th International Conference on Direct and Large-Eddy Simulation, 2010 - Eindhoven, Netherlands
Duration: 7 Jul 20109 Jul 2010

Publication series

NameERCOFTAC Series
Volume15
ISSN (Print)1382-4309
ISSN (Electronic)2215-1826

Conference

Conference8th International Conference on Direct and Large-Eddy Simulation, 2010
CountryNetherlands
CityEindhoven
Period7/07/109/07/10

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