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Determination of 2D equivalent angles of attack for a non-rotating wind turbine rotor blade

Technical Report:

Abstract

For the investigation into models to compute the title subject use has been made of the Lanchester-Prandtl lifting line model. The inflow conditions are given by a uniform inflow velocity and the geometrical angles of attack at every spanwise position. A model using pressure measurements at the instrumented sections and a model using 2-dimensional C{sub L}-{alpha} data at certain spanwise positions were investigated. In section two the experimental setups of the experiments at ECN (Netherlands Energy Research Foundation) and FFA (the Aeronautical Research Institute of Sweden) are presented. In section three the theoretical background and the different methods to compute the 2D equivalent angles of attack are outlined. In section four the results of the computations of the downwash and the 2D equivalent angles of attack for the considered FFA wind tunnel experiment is presented. Finally, in section five the most important conclusions are summarized and a recommendation for the computation of the 2D equivalent angles of attack for the non-rotating blade experiments at ECN is formulated. 59 figs., 2 tabs., 3 appendices, 30 refs.
Authors:
Publication Date:
Nov 01, 1993
Product Type:
Technical Report
Report Number:
ECN-I-93-036
Reference Number:
SCA: 170602; 990200; PA: ECN-93:0E0973; EDB-94:017892; NTS-94:008657; ERA-19:006546; SN: 94001127550
Resource Relation:
Other Information: DN: This student`s report is part of the aerodynamic research programme of the Wind Energy Group at the business unit Renewable Energy of the Netherlands Energy Research Foundation ECN, Petten, Netherlands; PBD: Nov 1993
Subject:
17 WIND ENERGY; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; AIRFOILS; AERODYNAMICS; HORIZONTAL AXIS TURBINES; ROTORS; PRESSURE GRADIENTS; THEORETICAL DATA; EXPERIMENTAL DATA; TWO-DIMENSIONAL CALCULATIONS; RADIAL VELOCITY; ANGULAR DISTRIBUTION; INCIDENCE ANGLE; TEST FACILITIES; ALGORITHMS; COMPUTER CALCULATIONS; NUMERICAL ANALYSIS; WIND TUNNELS; PRESSURE MEASUREMENT; GEOMETRY; AIR FLOW; TURBULENT FLOW; 170602; 990200; TURBINE DESIGN AND OPERATION; MATHEMATICS AND COMPUTERS
OSTI ID:
10115976
Research Organizations:
Netherlands Energy Research Foundation (ECN), Petten (Netherlands)
Country of Origin:
Netherlands
Language:
English
Other Identifying Numbers:
Other: ON: DE94729861; CNN: Project ECN 4240.01; TRN: NL93E0973
Availability:
OSTI; NTIS; Available from the library of the Netherlands Energy Research Foundation (ECN), P.O. Box 1, 1755 ZG Petten (Netherlands)
Submitting Site:
ECN
Size:
128 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Maassen, W H. Determination of 2D equivalent angles of attack for a non-rotating wind turbine rotor blade. Netherlands: N. p., 1993. Web.
Maassen, W H. Determination of 2D equivalent angles of attack for a non-rotating wind turbine rotor blade. Netherlands.
Maassen, W H. 1993. "Determination of 2D equivalent angles of attack for a non-rotating wind turbine rotor blade." Netherlands.
@misc{etde_10115976,
title = {Determination of 2D equivalent angles of attack for a non-rotating wind turbine rotor blade}
author = {Maassen, W H}
abstractNote = {For the investigation into models to compute the title subject use has been made of the Lanchester-Prandtl lifting line model. The inflow conditions are given by a uniform inflow velocity and the geometrical angles of attack at every spanwise position. A model using pressure measurements at the instrumented sections and a model using 2-dimensional C{sub L}-{alpha} data at certain spanwise positions were investigated. In section two the experimental setups of the experiments at ECN (Netherlands Energy Research Foundation) and FFA (the Aeronautical Research Institute of Sweden) are presented. In section three the theoretical background and the different methods to compute the 2D equivalent angles of attack are outlined. In section four the results of the computations of the downwash and the 2D equivalent angles of attack for the considered FFA wind tunnel experiment is presented. Finally, in section five the most important conclusions are summarized and a recommendation for the computation of the 2D equivalent angles of attack for the non-rotating blade experiments at ECN is formulated. 59 figs., 2 tabs., 3 appendices, 30 refs.}
place = {Netherlands}
year = {1993}
month = {Nov}
}