Dresden 2003 – wissenschaftliches Programm

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DY: Dynamik und Statistische Physik

DY 46: Poster

DY 46.18: Poster

Donnerstag, 27. März 2003, 15:30–18:00, P1

Dynamical Features of Atmospheric Wind Gusts — •Frank Böttcher and Joachim Peinke — University of Oldenburg

By means of stochastic tools we describe wind gusts in a probabilistic way. In this sense gusts are defined as velocity changes over short time intervals. We show evidence that the phenomenon of gusts is strongly connected to intermittent statistics, i.e. anomalous high probability of finding large velocity fluctuations. As a further characteristic we investigate the waiting time statistics of successive gusts. Most interestingly we find power law statistics. On the basis of this statistics a forecast becomes very difficult.

Furthermore in this contribution we present an approach how to extract stochastic models from wind measurements. In particular we extract the deterministic and noisy contributions to the time evolution of gusts. As a possible application stochastic modelling of loads of wind turbines or the power output will be discussed.