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Title: Airfoils for wind turbine

Abstract

Airfoils for the tip and mid-span regions of a wind turbine blade have upper surface and lower surface shapes and contours between a leading edge and a trailing edge that minimize roughness effects of the airfoil and provide maximum lift coefficients that are largely insensitive to roughness effects. The airfoil in one embodiment is shaped and contoured to have a thickness in a range of about fourteen to seventeen percent, a Reynolds number in a range of about 1,500,000 to 2,000,000, and a maximum lift coefficient in a range of about 1.4 to 1.5. In another embodiment, the airfoil is shaped and contoured to have a thickness in a range of about fourteen percent to sixteen percent, a Reynolds number in a range of about 1,500,000 to 3,000,000, and a maximum lift coefficient in a range of about 0.7 to 1.5. Another embodiment of the airfoil is shaped and contoured to have a Reynolds in a range of about 1,500,000 to 4,000,000, and a maximum lift coefficient in a range of about 1.0 to 1.5.

Inventors:
 [1];  [2]
  1. (Boulder, CO)
  2. (State College, PA)
Issue Date:
Research Org.:
Midwest Research Institute
OSTI Identifier:
873012
Patent Number(s):
6068446
Assignee:
Midwest Research Institute (Kansas City, MO) NREL
DOE Contract Number:  
AC36-83CH10093
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
airfoils; wind; turbine; tip; mid-span; regions; blade; upper; surface; shapes; contours; leading; edge; trailing; minimize; roughness; effects; airfoil; provide; maximum; lift; coefficients; insensitive; embodiment; shaped; contoured; thickness; range; fourteen; seventeen; percent; reynolds; 500; 000; coefficient; sixteen; lift coefficient; maximum lift; leading edge; wind turbine; upper surface; turbine blade; trailing edge; provide maximum; roughness effects; surface shape; /416/

Citation Formats

Tangler, James L., and Somers, Dan M. Airfoils for wind turbine. United States: N. p., 2000. Web.
Tangler, James L., & Somers, Dan M. Airfoils for wind turbine. United States.
Tangler, James L., and Somers, Dan M. Sat . "Airfoils for wind turbine". United States. https://www.osti.gov/servlets/purl/873012.
@article{osti_873012,
title = {Airfoils for wind turbine},
author = {Tangler, James L. and Somers, Dan M.},
abstractNote = {Airfoils for the tip and mid-span regions of a wind turbine blade have upper surface and lower surface shapes and contours between a leading edge and a trailing edge that minimize roughness effects of the airfoil and provide maximum lift coefficients that are largely insensitive to roughness effects. The airfoil in one embodiment is shaped and contoured to have a thickness in a range of about fourteen to seventeen percent, a Reynolds number in a range of about 1,500,000 to 2,000,000, and a maximum lift coefficient in a range of about 1.4 to 1.5. In another embodiment, the airfoil is shaped and contoured to have a thickness in a range of about fourteen percent to sixteen percent, a Reynolds number in a range of about 1,500,000 to 3,000,000, and a maximum lift coefficient in a range of about 0.7 to 1.5. Another embodiment of the airfoil is shaped and contoured to have a Reynolds in a range of about 1,500,000 to 4,000,000, and a maximum lift coefficient in a range of about 1.0 to 1.5.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {1}
}

Patent:

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