Effects of the water level on the flow topology over the Bolund island

The Science of Making Torque from Wind 2014

Cuerva-Tejero, A.^1 ; Yeow, T.S.^1 ; Gallego-Castillo, C.^2 ; Lopez-Garcia, O.^1

Institute Universitario de Microgravedad Ignacio da Riva, E.T.S.I. Aeronáuticos, Universidad Politécnica de Madrid, E-28040 Madrid, Spain^1

Departamento de Vehiculos Aeroespaciales, E.T.S.I. Aeronáuticos, Universidad Politecnica de Madrid, E-28040 Madrid, Spain^2

关键词: Atmospheric conditions;    Field statistics;    Flow topology;    Mean wind speed;    Recirculating flow;    Turbulent kinetic energy;    Velocity field;    Westerly winds;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/524/1/012111/pdf
DOI  :  10.1088/1742-6596/524/1/012111

来源: IOP

【 摘 要 】

We have analyzed the influence of the actual height of Bolund island above water level on different full-scale statistics of the velocity field over the peninsula. Our analysis is focused on the database of 10-minute statistics provided by Risø-DTU for the Bolund Blind Experiment. We have considered 10-minut.e periods with near-neutral atmospheric conditions, mean wind speed values in the interval [5,20] m/s, and westerly wind directions. As expected, statistics such as speed-up, normalized increase of turbulent kinetic energy and probability of recirculating flow show a large dependence on the emerged height of the island for the locations close to the escarpment. For the published ensemble mean values of speed-up and normalized increase of turbulent kinetic energy in these locations, we propose that some ammount of uncertainty could be explained as a deterministic dependence of the flow field statistics upon the actual height of the Bolund island above the sea level.