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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, Kansas City, MO (United States)
OSTI Identifier:
873012
Patent Number(s):
6068446
Assignee:
Midwest Research Institute (Kansas City, MO)
Patent Classifications (CPCs):
F - MECHANICAL ENGINEERING F03 - MACHINES OR ENGINES FOR LIQUIDS F03D - WIND MOTORS
F - MECHANICAL ENGINEERING F05 - INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04 F05B - INDEXING SCHEME RELATING TO MACHINES OR ENGINES OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, TO WIND MOTORS, TO NON-POSITIVE DISPLACEMENT PUMPS, AND TO GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY
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}
}

Works referenced in this record:

Subsonic Natural-Laminar-Flow Airfoils
book, January 1992


Wing-section effects on the flight performance of a remotely pilotedvehicle
journal, October 1989


Thick airfoils for HAWTs
journal, January 1992