Wake has a high impact on wind turbine performance and durability. Its impact, without a doubt, should be considered in wind resource assessment. However, wakes in the forest is a niche that is only examined by a couple of countries which area has a significant per cent land covered in forests. In this thesis, the wake over a homogenous forest is analysed, using the realisable k-e model. Simulations were performed using OpenFOAM software. Firstly, simulations were performed for one wind turbine to examine if RANS is a reliable tool for wake calculation. Secondly, the power production of two wind turbines in tandem are examined ,where one is in the wake of another one. Wind speed velocity analysis concluded that RANS credible predicts velocity deficit in the wake region and could be used in forested areas. For instance, the correlation coefficient for velocity mostly lies above 0.9. Also, the distance between wind turbine swhich would be erected in the forest could be reduced. The reduction could exceed up to 3D with only 35% power loss, which means that wind farms in forests could be more compact. Further studies could examine multiple wake interactions and how a combination of forest clearing, vegetation growth and snow cover affects wind farm performance over a lifespan.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:uu-469950 |
| Date | January 2022 |
| Creators | Zubov, Semion |
| Publisher | Uppsala universitet, Institutionen för geovetenskaper |
| Source Sets | DiVA Archive at Upsalla University |
| Language | English |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
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