Understanding Wind-Turbine Wake Breakdown Using Computational Fluid Dynamics
| Autor: | S. Gomez-Iradi, George N. Barakos, Mark Woodgate, Xabier Munduate, Rene Steijl, M. Carrión |
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| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | AIAA Journal. 53:588-602 |
| ISSN: | 1533-385X 0001-1452 |
| Popis: | This work explores the breakdown of the wake downstream of the Model Experiments in Controlled Conditions Project (known as the MEXICO project) wind-turbine rotor and assesses the capability of computational fluid dynamics in predicting its correct physical mechanism. The wake is resolved on a fine mesh able to capture the vortices up to eight rotor radii downstream of the blades. At a wind speed of 15 m/s, the main frequency present in the computational fluid dynamics signals for up to four radii was the blade-passing frequency (21.4 Hz), where the vortex cores fall on a perfect spiral. Between four and five radii downstream, higher-frequency content was present, which indicated the onset of instabilities and results in vortex pairing. The effect of modeling a 120 deg azimuthally periodic domain and a 360 deg three-bladed rotor domain was studied, showing similar predictions for the location of the onset of instabilities. An increased frequency content was captured in the latter case. Empirical and wake... |
| Databáze: | OpenAIRE |
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