Coupled simulations and comparison with multi-lidar measurements of the wind flow over a double-ridge

The Science of Making Torque from Wind

Rodrigues, C. Veiga^1 ; Palma, J.M.L.M.^1 ; Vasiljevi, N.^2 ; Courtney, M.^2 ; Mann, J.^2

Departamento de Engenharia Mecânica, Faculdade de Engenharia, Universidade Do Porto, Portugal^1

DTU Wind Energy, Risø Campus, Roskilde, Denmark^2

关键词: Central portugal;    Chain coupling;    Coupled simulation;    Field measurement;    Horizontal resolution;    Lidar measurements;    Rough terrains;    Wave activity;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/753/3/032025/pdf
DOI  :  10.1088/1742-6596/753/3/032025

来源: IOP

【 摘 要 】

The wind flow over a double-ridge site has been numerically simulated with a nested model- chain coupling, down to horizontal resolutions of 40 m. The results were compared with field measurements attained using a triple-lidar instrument, the long-range WindScanner system, which allowed measurements up to 500 m height and the mapping of the wind speed onto a two-dimensional transect crossing the valley. The site, known as Serra do Perdigão, is located in central Portugal and consists of two parallel ridges 1.4 km apart with height differences of 200 m in between, being characterized by rough terrain and forested areas. The analysis was restricted to June 10th2015, for which measurements and simulations both predicted gravity wave activity, the later showing formation of rotors in the lee of both ridges and some events of wave breaking above the ridge top.