National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

Nebulous Art of Using Wind-Tunnel Airfoil Data for Predicting Rotor Performance: Preprint.

DE200215000705

Publication Date	2002
Personal Author	Tangler, J. L.
Page Count	10
Abstract	The objective of this study was threefold: to evaluate different two-dimensional S809 airfoil data sets in the prediction of rotor performance; to compare blade-element momentum rotor predicted results to lifting-surface, prescribed-wake results; and to compare the NASA Ames combined experiment rotor measured data with the two different performance prediction methods. The S809 airfoil data sets evaluated included those from Delft University of Technology, Ohio State University, and Colorado State University. The performance prediction comparison with NASA Ames data documents shortcomings of these performance prediction methods and recommends the use of the lifting-surface, prescribed-wake method over blade-element momentum theory for future analytical improvements.
Keywords	Wind energy Predictions Wind tunnel tests Airfoils Data analysis Rotors Performance evaluation Rotor blades Wakes Lifting surfaces Wind research
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	National Renewable Energy Lab., Golden, CO.; Department of Energy, Washington, DC.
Document Type	Conference Proceedings
NTIS Issue Number	200225
Contract Number	AC36-99-GO10337

Nebulous Art of Using Wind-Tunnel Airfoil Data for Predicting Rotor Performance: Preprint.

Nebulous Art of Using Wind-Tunnel Airfoil Data for Predicting Rotor Performance: Preprint.
DE200215000705

Publication Date	2002
Personal Author	Tangler, J. L.
Page Count	10
Abstract	The objective of this study was threefold: to evaluate different two-dimensional S809 airfoil data sets in the prediction of rotor performance; to compare blade-element momentum rotor predicted results to lifting-surface, prescribed-wake results; and to compare the NASA Ames combined experiment rotor measured data with the two different performance prediction methods. The S809 airfoil data sets evaluated included those from Delft University of Technology, Ohio State University, and Colorado State University. The performance prediction comparison with NASA Ames data documents shortcomings of these performance prediction methods and recommends the use of the lifting-surface, prescribed-wake method over blade-element momentum theory for future analytical improvements.
Keywords	Wind energy Predictions Wind tunnel tests Airfoils Data analysis Rotors Performance evaluation Rotor blades Wakes Lifting surfaces Wind research
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	National Renewable Energy Lab., Golden, CO.; Department of Energy, Washington, DC.
Document Type	Conference Proceedings
NTIS Issue Number	200225
Contract Number	AC36-99-GO10337