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

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Description

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 ... continued below

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Pages: 294

Creation Information

Gohard, J.C. September 1, 1978.

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Description

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.

Physical Description

Pages: 294

Notes

Dep. NTIS, PC A13/MF A01.

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  • Report No.: COO-4131-T1(Vol.8)
  • Grant Number: EY-76-S-02-4131
  • DOI: 10.2172/5428795 | External Link
  • Office of Scientific & Technical Information Report Number: 5428795
  • Archival Resource Key: ark:/67531/metadc1072649

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  • September 1, 1978

Added to The UNT Digital Library

  • Feb. 4, 2018, 10:51 a.m.

Description Last Updated

  • March 27, 2018, 7 p.m.

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Gohard, J.C. Free wake analysis of wind turbine aerodynamics. Wind energy conversion. ASRL-TR-184-14, report, September 1, 1978; United States. (digital.library.unt.edu/ark:/67531/metadc1072649/: accessed September 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.