Highly resolved measurements of atmospheric turbulence with the new 2d-Atmospheric Laser Cantilever Anemometer

The Science of Making Torque from Wind 2012

Jeromin, A.^1 ; Schaffarczyk, A.P.^2 ; Puczylowski, J.^3 ; Peinke, J.^3 ; Hölling, M.^3

Forschungs- und Entwicklungszentrum FH Kiel GmbH, Schwentinestraße 24, Kiel

24149, Germany^1

University of Applied Sciences Kiel, Grenzstr. 3, Kiel

24149, Germany^2

ForWind-Center for Wind Energy Research, Institute of Physics, Carl von Ossietzky University, Oldenburg, Ammerlaender Heerstraße 136, Oldenburg

26129, Germany^3

关键词: Above ground level;    Atmospheric laser;    Atmospheric turbulent flow;    Operating environment;    Spatial resolution;    Temporal resolution;    Turbulent structures;    Wind field characteristics;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/555/1/012054/pdf
DOI  :  10.1088/1742-6596/555/1/012054

来源: IOP

【 摘 要 】

For the investigation of atmospheric turbulent flows on small scales a new anemometer was developed, the so-called 2d-Atmospheric Laser Cantilever Anemometer (2d-ALCA). It performs highly resolved measurements with a spatial resolution in millimeter range and temporal resolution in kHz range, thus detecting very small turbulent structures. The anemometer is a redesign of the successfully operating 2d-LCA for laboratory application. The new device was designed to withstand hostile operating environments (rain and saline, humid air). In February 2012, the 2d-ALCA was used for the first time in a test field. The device was mounted in about 53 m above ground level on a lattice tower near the German North Sea coast. Wind speed was measured by the 2d-ALCA at 10 kHz sampling rate and by cup anemometers at 1 Hz. The instantaneous wind speed ranged from 8 m/s to 19 m/s at an average turbulence level of about 7 %. Wind field characteristics were analyzed based on cup anemometer as well as 2d-ALCA. The combination of both devices allowed the study of atmospheric turbulence over several magnitudes in turbulent scales.