On Space-Time Resolution of Inflow Representations for Wind Turbine Loads Analysis

Energies

Chungwook Sim²  Sukanta Basu¹ 

[1] Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, NC 27695, USA; E-Mail:;School of Civil Engineering, Purdue University, West Lafayette, IN 47907, USA; E-Mail:

关键词: large-eddy simulation;    stochastic simulation;    wind turbine loads;   

DOI  :  10.3390/en5072071

来源: mdpi

【 摘 要 】

Efficient spatial and temporal resolution of simulated inflow wind fields is important in order to represent wind turbine dynamics and derive load statistics for design. Using Fourier-based stochastic simulation of inflow turbulence, we first investigate loads for a utility-scale turbine in the neutral atmospheric boundary layer. Load statistics, spectra, and wavelet analysis representations for different space and time resolutions are compared. Next, large-eddy simulation (LES) is employed with space-time resolutions, justified on the basis of the earlier stochastic simulations, to again derive turbine loads. Extreme and fatigue loads from the two approaches used in inflow field generation are compared. On the basis of simulation studies carried out for three different wind speeds in the turbine’s operating range, it is shown that inflow turbulence described using 10-meter spatial resolution and 1 Hz temporal resolution is adequate for assessing turbine loads. Such studies on the investigation of adequate filtering or resolution of inflow wind fields help to establish efficient strategies for LES and other physical or stochastic simulation needed in turbine loads studies.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.