Free wake analysis of wind turbine aerodynamics. Wind energy conversion. ASRL-TR-184-14

Technical Report · Fri Sep 01 00:00:00 EDT 1978

DOI:https://doi.org/10.2172/5428795· OSTI ID:5428795

Gohard, J. C.

The underlying theory is presented for determining blade and rotor/tower vibration and dynamic stability characteristics as well as the basic dynamic (as opposed to aerodynamic) operating loads. Starting with a simple concept of equivalent hinged rotors, the equations of motion for the blade including pitch, flap and lag motions are developed. The nonlinear equations are derived first and linearized about a finite displacement of the blade out of the plane of rotation. This is important since wind turbines tend to operate at relatively high coning angles. The effect of distributed flexibility, as opposed to the equivalent hinge concept, is then discussed.

• Research Organization: Massachusetts Inst. of Tech., Cambridge (USA). Aeroelastic and Structures Research Lab.
• DOE Contract Number: EY-76-S-02-4131
• OSTI ID: 5428795
• Report Number(s): COO-4131-T1(Vol.8)
• Country of Publication: United States
• Language: English

Related Subjects

17 WIND ENERGY
WIND TURBINES
AERODYNAMICS
STRESSES
MATHEMATICAL MODELS
MECHANICAL STRUCTURES
MECHANICAL VIBRATIONS
STABILITY
TURBULENCE
FLUID MECHANICS
MECHANICS
170602* - Wind Energy Engineering- Turbine Design & Operation