Yaw dynamics of horizontal axis wind turbines: First annual report

Technical Report · Mon Feb 01 04:00:00 EST 1988

OSTI ID:5322610

Xudong, C; Hansen, A; Siedschlag, N

Numerous problems associated with yaw exists on free-yaw and yaw-driven wind turbines. Yaw-driven machines experience failures in the yaw drive due to excessive loads, while free-yaw machines experience high yaw rates and frequent misalignment problems. This report describes a theoretical investigation of the yaw behavior of wind turbines, which was carried out by the University of Utah. The basic approach to this analysis was to develop a series of analytical and computer models such that each successive model added complexity and increased accuracy. These models are described and compared to results from other models and also to test data. Comments are made on the models' ability to predict yaw moments and response. Also, useful insight is presented regarding the free-yaw behavior of wind turbines as observed using these models. The most complex of these models is used to predict the coupled free-yaw and flap motions of a rotor. This model, ''YawDyn,'' is operational; however, experience with it is limited. Future plans, for further enhancing and validating this model, are also discussed. 20 refs., 36 figs., 3 tabs.

• Research Organization: Utah Univ., Salt Lake City (USA). Dept. of Mechanical Engineering
• DOE Contract Number: AC02-83CH10093
• OSTI ID: 5322610
• Report Number(s): SERI/STR-217-3309; ON: DE88001137
• Country of Publication: United States
• Language: English

Related Subjects

17 WIND ENERGY
170602* -- Wind Energy Engineering-- Turbine Design & Operation
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
COMPUTER CODES
COMPUTERIZED SIMULATION
DATA
DOCUMENT TYPES
DYNAMIC LOADS
HORIZONTAL AXIS TURBINES
INFORMATION
MACHINERY
MATHEMATICAL MODELS
NUMERICAL DATA
PROGRESS REPORT
SIMULATION
THEORETICAL DATA
TURBINES
TURBOMACHINERY
WIND LOADS
WIND TURBINES