AEROELASTIC TAILORING IN WINDTURBINE （气动弹性剪裁在下列）.pdfVIP

Presented at Windpower ’98, American Wind Energy Association Meeting and Exhibition, Bakersfield, California, April 28 – May 1, 1998 1 AEROELASTIC TAILORING IN WIND-TURBINE BLADE APPLICATIONS Paul Veers Gunjit Bir Sandia National Laboratories National Renewable Energy Laboratory Wind Energy Technology Department National Wind Technology Center Albuquerque, New Mexico, 87185-0708 Golden, Colorado, 80401-3393 Donald Lobitz Sandia National Laboratories Structural Dynamics Department Albuquerque, New Mexico, 87185-0439 Abstract This paper reviews issues related to the use of aeroelastic tailoring as a cost-effective, passive means to shape the power curve and reduce loads. Wind turbine blades bend and twist during operation, effectively altering the angle of attack, which in turn affects loads and energy production. There are blades now in use that have significant aeroelastic couplings, either on purpose or because of flexible and light-weight designs. Since aeroelastic effects are almost unavoidable in flexible blade designs, it may be desirable to tailor these effects to our advantage. Efforts have been directed at adding flexible devices to a blade, or blade tip, to passively regulate power (or speed) in high winds. It is also possible to build a small amount of desirable twisting into the load response of a blade with