Vertical axis wind turbine turbulent response model:

Technical Report · Mon Jan 01 00:00:00 EST 1990

OSTI ID:5163502

The dynamic response of Sandia National Laboratories' 34-m Darrieus rotor wind turbine at Bushland, Texas, is presented. The formulation used a double-multiple streamtube aerodynamic model with a turbulent airflow and included the effects of linear aeroelastic forces. The structural analysis used established procedures with the program MSC/NASTRAN. The effects of aeroelastic forces on the damping of natural modes agree well with previous results at operating rotor speeds, but show some discrepancies at very high rotor speeds. A number of alternative expressions for the spectrum of turbulent wind were investigated. The model loading represented by each does not differ significantly; a more significant difference is caused by imposing a full lateral coherence of the turbulent flow. Spectra of the predicted stresses at various locations show that without aeroelastic forces, very severe resonance is likely to occur at certain natural frequencies. Inclusion of aeroelastic effects greatly attenuates this stochastic response, especially in modes involving in-plane blade bending. 15 refs., 8 figs., 7 tabs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA); Indal Technologies, Inc., Mississauga, ON (Canada)
• Sponsoring Organization: DOE/CE
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5163502
• Report Number(s): SAND-89-7042; ON: DE90005721; CNN: 32-3044
• Country of Publication: United States
• Language: English

Related Subjects

17 WIND ENERGY
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
VERTICAL AXIS TURBINES
RESPONSE FUNCTIONS
A CODES
AERODYNAMICS
DYNAMIC LOADS
FORTRAN
MATHEMATICAL MODELS
STOCHASTIC PROCESSES
STRESSES
TURBULENT FLOW
COMPUTER CODES
FLUID FLOW
FLUID MECHANICS
FUNCTIONS
MACHINERY
MECHANICS
PROGRAMMING LANGUAGES
TURBINES
TURBOMACHINERY
WIND TURBINES
170600* - Wind Energy Engineering
990200 - Mathematics & Computers