Peinke - Wind Energy (Springer, 2007).pdf - wiatraki - j_czaja1

Wind Energy

Proceedings of the Euromech Colloquium

Joachim Peinke, Peter Schaumann

and Stephan Barth (Eds.)

Wind Energy

Proceedings of the Euromech

Colloquium

With 199 Figures and 14 Tables

123

Prof. Dr. Joachim Peinke

Dr. Stephan Barth

ForWind - Center for Wind Energy Research

Institute of Physics

Carl- von- ssietzky University ldenburg

Carl-von- ssietzky University ldenburg

26111 Oldenburg

Germany

stephan.barth@uni-oldenburg.de

Germany

peinke@uni-oldenburg.de

Prof. Dr.-Ing. Peter Schaumann

ForWind - Center for Wind Energy Research

University of Hannover

Institute for Steel Construction

Appelstrasse 9a

30167 Hannover

schaumann stahl.uni-hannover.de

LibraryofCongressControlNumber:

2006932261

ISBN-10 3-540-33865-9 Springer Berlin Heidelberg New York

ISBN-13 978-3-540-33865-9 Springer Berlin Heidelberg New York

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Preface

Wind energy is one of the prominent renewable energy sources on earth.

During the last decade there has been a tremendous growth, both in size

and power of wind energy converters (WECs). The global installed power has

increased from 7.5 GW in 1997 to more than 50 GW in 2005 (WWEA – March

2005). At the same time, turbines have grown from kW machines to 5 MW

turbines with rotor diameters of more than 100 m. This enormous develop-

ment and the more recent use in oﬀshore application made high demands on

design, construction and operation of WECs. Thus not only a new major in-

dustry has been established but also a new interdisciplinary ﬁeld of research

aﬀecting scientists from engineering, physics and meteorology.

In order to tackle the problems and reservations in this interdiscipli-

nary community of wind energy scientists, ForWind, the Center for Wind

Energy Research of the Universities of Oldenburg and Hanover, arranged the

EUROMECH Colloquium 464b – Wind Energy, which was held from October

4, 7, 2005, at the Carl von Ossietzky University of Oldenburg, Germany. The

central aim of this colloquium was to bring together the up to then separate

communities of wind energy scientists and those who do fundamental research

in mechanics. Wind energy is a challenging task in mechanics and many of

future progress will ﬁnd relevant applications in wind energy conversion.

More than 100 experts coming from 16 countries from all over the world

attended the meeting, conﬁrming the need and the concept of this colloquium.

The 46 oral and 28 poster presentations were grouped in the following topics:

– Wind climate and wind ﬁeld

– Gusts, extreme events and turbulence

– Power production and ﬂuctuations

– Rotor aerodynamics

– Wake eﬀects

– Materials, fatigue and structural health monitoring

Phenomenological approaches mainly based on experimental and empirical

data as well as advanced fundamental mathematical scientiﬁc approaches have

Preface

been presented, spanning the range from reliability investigations to new CFD

codes for turbulence models or Levy statistics of wind ﬂuctuations.

During this meeting it became clear, which fundamental scientiﬁc tasks

will have essential importance for future developments in wind energy:

– A better understanding of the marine atmospheric boundary layer, ranging

from mean wind proﬁles to high resolved inﬂuences of turbulence. These

questions need further measurements as well as genuine simulations and

models. A proper and detailed wind ﬁeld description is indispensable for

correct power and load modeling.

– CFD simulations for wind proﬁles and rotor aerodynamics with advanced

methods (aeroelastic codes) that include experimental details on the

dynamic stall phenomenon as well as near and far ﬁeld rotor wakes.

– A site independent description of wind power production taking into

account turbulence induced ﬂuctuations.

– Material loads of diﬀerent components of a WEC and the fatigue recog-

nition of which due to the high number of lifecycles of such complex

machines.

– To establish an advanced numerical hybrid model for a 3D simulation of

a WEC, taking into account wind and wave loads as well as all eﬀects of

operation in a so-called ‘integrated’ model.

Many intensive discussions on these and other topics took place between

participants from diﬀerent disciplines during coﬀee and lunch breaks and

also during the social evening events reception of the city at the “ehema-

lige Exerzierhalle” and the conference dinner on the nightly lake of Bad

Zwischenahn.

The positive feedback for the meeting’s scientiﬁc and social aspects encour-

aged the scientiﬁc committee to decide to have follow-up meetings alternately

organized by Duwind, Risø and ForWind. All participants shared the opinion

that the scientiﬁc interdisciplinary cooperation and international collabora-

tion shall be intensiﬁed.

The organizers want to thank the scientiﬁc committee members Martin

Kuhn, Gijs van Kuik, Soeren E. Larsen, Ramgopal Puthli and Daniel Schertzer

for helping to organize this conference and establishing this book. Further-

more, we are grateful for the ﬁnancial support of the Federal Ministry of Edu-

cation and Research, the City of Oldenburg and the EWE company. Special

thanks go to Margret Warns, Elke Seidel, Moses Karn, Martin Grosser, Frank

Bottcher for organizing all technical and administrative concerns.

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