مورد إلكتروني
Spectral tensor parameters for wind turbine load modeling from forested and agricultural landscapes
| العنوان: | Spectral tensor parameters for wind turbine load modeling from forested and agricultural landscapes |
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| بيانات النشر: | KTH, Mekanik 2015 |
| تفاصيل مُضافة: | Chougule, A. Mann, J. Segalini, Antonio Dellwik, E. |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | A velocity spectral tensor model was evaluated from the single-point measurements of wind speed. The model contains three parameters representing the dissipation rate of specific turbulent kinetic energy, a turbulence length scale and the turbulence anisotropy. Sonic anemometer measurements taken over a forested and an agricultural landscape were used to calculate the model parameters for neutral, slightly stable and slightly unstable atmospheric conditions for a selected wind speed interval. The dissipation rate above the forest was nine times that at the agricultural site. No significant differences were observed in the turbulence length scales between the forested and agricultural areas. Only a small difference was observed in the turbulence anisotropy at the two sites, except near the surface, where the forest turbulence was more isotropic. The turbulence anisotropy remained more or less constant with height at the forest site, whereas the turbulence became more isotropic with height for the agricultural site. Using the three parameters as inputs, we quantified the performance of the model in coherence predictions for vertical separations. The model coherence of all the three velocity components was overestimated for the analyzed stability classes at both sites. As expected from the model approximations, the model performed better at both sites for neutral stability than slightly stable and unstable conditions. The model prediction of coherence of the along-wind and vertical components was better than that of the cross-wind component. No significant difference was found between the performance of the model at the forested and the agricultural areas. QC 20170119 |
| مصطلحات الفهرس: | spectral tensor, forest flow, dissipation rate, length scale, turbulence anisotropy, Energy Engineering, Energiteknik, Article in journal, info:eu-repo/semantics/article, text |
| DOI: | 10.1002.we.1709 |
| URL: | Wind Energy, 1095-4244, 2015, 18:3, s. 469-481 |
| الإتاحة: | Open access content. Open access content info:eu-repo/semantics/restrictedAccess |
| ملاحظة: | English |
| أرقام أخرى: | UPE oai:DiVA.org:kth-161102 0000-0001-8667-0520 doi:10.1002/we.1709 ISI:000348899700006 Scopus 2-s2.0-84921846223 1234775853 |
| المصدر المساهم: | UPPSALA UNIV LIBR From OAIster®, provided by the OCLC Cooperative. |
| رقم الأكسشن: | edsoai.on1234775853 |
| قاعدة البيانات: | OAIster |
| DOI: | 10.1002.we.1709 |
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