Design and Experimental Results for the S809 Airfoil

Design and Experimental Results for the S809 Airfoil

Research output: NREL › Subcontract Report

Abstract

A 21% thick, laminar-flow airfoil, the S809, for horizontal-axis wind turbine applications, has been designed and analyzed theoretically and verified experimentally in the low-turbulence wind tunnel of Delft University of Technology Low Speed Laboratory, The Netherlands. The two primary objectives of restrained maximum lift, insensitive to roughness, and low profile drag have been achieved. Theairfoil also exhibits a docile stall. Comparisons of the theoretical and experimental results show good agreement. Comparisons with other airfoils illustrate the restrained maximum lift coefficient as well as the lower profile-drag coefficients, thus confirming the achievement of the primary objectives.

Original language	American English
Number of pages	103
State	Published - 1997

Bibliographical note

Work performed by Airfoils, Incorporated, State College, Pennsylvania

NREL Publication Number

NREL/SR-440-6918

Keywords

horizontal-axis wind-turbine airfoil

Access to Document

https://www.nrel.gov/docs/legosti/old/6918.pdf

Cite this

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title = "Design and Experimental Results for the S809 Airfoil",

abstract = "A 21% thick, laminar-flow airfoil, the S809, for horizontal-axis wind turbine applications, has been designed and analyzed theoretically and verified experimentally in the low-turbulence wind tunnel of Delft University of Technology Low Speed Laboratory, The Netherlands. The two primary objectives of restrained maximum lift, insensitive to roughness, and low profile drag have been achieved. Theairfoil also exhibits a docile stall. Comparisons of the theoretical and experimental results show good agreement. Comparisons with other airfoils illustrate the restrained maximum lift coefficient as well as the lower profile-drag coefficients, thus confirming the achievement of the primary objectives.",

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AB - A 21% thick, laminar-flow airfoil, the S809, for horizontal-axis wind turbine applications, has been designed and analyzed theoretically and verified experimentally in the low-turbulence wind tunnel of Delft University of Technology Low Speed Laboratory, The Netherlands. The two primary objectives of restrained maximum lift, insensitive to roughness, and low profile drag have been achieved. Theairfoil also exhibits a docile stall. Comparisons of the theoretical and experimental results show good agreement. Comparisons with other airfoils illustrate the restrained maximum lift coefficient as well as the lower profile-drag coefficients, thus confirming the achievement of the primary objectives.

KW - horizontal-axis wind-turbine airfoil

M3 - Subcontract Report

ER -

Design and Experimental Results for the S809 Airfoil

Abstract

Bibliographical note

NREL Publication Number

Keywords

Access to Document

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Cite this