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https://doi.org/10.1088/1742-6596/854/1/012052
Title: | Characterizing the coherent structures in large eddy simulations of aligned windfarms | Authors: | Zhang, M Stevens, R.J.A.M |
Keywords: | Atmospheric movements Large eddy simulation Principal component analysis Wakes Wind turbines Coherent structure Counter rotating POD analysis POD modes Proper orthogonal decomposition method Streamwise directions Wind farm Work study Atmospheric boundary layer |
Issue Date: | 2017 | Citation: | Zhang, M, Stevens, R.J.A.M (2017). Characterizing the coherent structures in large eddy simulations of aligned windfarms. Journal of Physics: Conference Series 854 (1) : 12052. ScholarBank@NUS Repository. https://doi.org/10.1088/1742-6596/854/1/012052 | Rights: | Attribution 4.0 International | Abstract: | The present work studies the large coherent structures in large eddy simulations of windfarms using proper orthogonal decomposition (POD) method. In order to evaluate the effect of wind turbines on coherent structures, we consider three cases. One is a reference flow of a neutral atmospheric boundary layer and the other two are periodic and developing aligned windfarms. The number of wind turbines is large, 16 × 12 for periodic windfarm, and 12 × 12 for developing windfarm. The simulations are run for a long time in order to generate a sufficient database for POD analysis. In all cases, elongated streamwise counter rotating roll structures, covering 1 or 2 turbines in spanwise direction, are identified as the dominant POD mode. Another pattern, varying in streamwise direction, also appears in all the three cases. © Published under licence by IOP Publishing Ltd. | Source Title: | Journal of Physics: Conference Series | URI: | https://scholarbank.nus.edu.sg/handle/10635/179484 | ISSN: | 17426588 | DOI: | 10.1088/1742-6596/854/1/012052 | Rights: | Attribution 4.0 International |
Appears in Collections: | Elements Staff Publications |
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