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Title: Overspeed spoilers for vertical axis wind turbine

Abstract

An overspeed spoiler is described for vertical axis wind turbines of the type having straight or curved airfoil blades attached to a vertical shaft formed by a relatively thin flat blade shaped spoiler element hinge mounted on the trailing edge, leading edge, or at a central position of a portion of the airfoil section. The element has two portions one of which is held flush or against a surface by spring means with a surface of the blade towards the turbine rotor axis and the other lies substantially parallel to the chordline of the airfoil. The weight and configuration of the element is such that at a predetermined turbine rotor speed the element rotates against the spring force because of centrifugal action and takes up a position generally transverse to the air flow direction such as to cause much increased drag and control overspeeding of the rotor.

Inventors:
;
Publication Date:
OSTI Identifier:
6748226
Patent Number(s):
US 4082479
Assignee:
Canadian Patents and Development Ltd.
Resource Type:
Patent
Resource Relation:
Patent Priority Date: Priority date 25 Sep 1975, Canada
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY; DARRIEUS ROTORS; AIRFOILS; BRAKES; TURBINE BLADES; VERTICAL AXIS TURBINES; MACHINE PARTS; ROTORS; WIND TURBINES; 170602* - Wind Energy Engineering- Turbine Design & Operation

Citation Formats

Rangi, R S, and South, P. Overspeed spoilers for vertical axis wind turbine. United States: N. p., 1978. Web.
Rangi, R S, & South, P. Overspeed spoilers for vertical axis wind turbine. United States.
Rangi, R S, and South, P. Tue . "Overspeed spoilers for vertical axis wind turbine". United States.
@article{osti_6748226,
title = {Overspeed spoilers for vertical axis wind turbine},
author = {Rangi, R S and South, P},
abstractNote = {An overspeed spoiler is described for vertical axis wind turbines of the type having straight or curved airfoil blades attached to a vertical shaft formed by a relatively thin flat blade shaped spoiler element hinge mounted on the trailing edge, leading edge, or at a central position of a portion of the airfoil section. The element has two portions one of which is held flush or against a surface by spring means with a surface of the blade towards the turbine rotor axis and the other lies substantially parallel to the chordline of the airfoil. The weight and configuration of the element is such that at a predetermined turbine rotor speed the element rotates against the spring force because of centrifugal action and takes up a position generally transverse to the air flow direction such as to cause much increased drag and control overspeeding of the rotor.},
doi = {},
url = {https://www.osti.gov/biblio/6748226}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1978},
month = {4}
}