To reduce the level of uncertainty associated with current rotor aerodynamics codes, improved understanding of rotor aerodynamics is required. Wind tunnel measurements on model rotors contribute to advancing our knowledge on rotor aerodynamics. The combined recording of blade loads and rotor wake is desired, because of the coupled blade and wake aerodynamics. In general, however, the small size of model rotors prohibits detailed blade load measurements; only the rotor wake is recorded. To estimate the experimental blade flow conditions, a measurement analysis tool is developed: the inverse vortex wake model. The rotor wake is approximated by a lifting line model, using rotor wake measurements to reconstruct the vortex wake. Conservation of circulation, combined with the Biot–Savart law, allows the induced velocity to be expressed in terms of the bound circulation. The unknown bound circulation can be solved for, since the velocity is known from rotor wake measurements. The inverse vortex wake model is subsequently applied to measurements on the near wake of a model rotor subject to both axial and yawed flow conditions, performed at a TUDelft open jet wind tunnel. The inverse vortex wake model estimates the unsteady experimental blade flow conditions and loads that otherwise would have remained obscured.
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e-mail: w.haans@lr.tudelft.nl
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August 2008
Research Papers
The Inverse Vortex Wake Model: A Measurement Analysis Tool
Wouter Haans,
Wouter Haans
Ph.D. student
Faculty of Aerospace Engineering,
e-mail: w.haans@lr.tudelft.nl
Delft University of Technology
, Kluyverweg 1, 2629 HS, Delft, The Netherlands
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Gijs van Kuik,
Gijs van Kuik
Professor
Faculty of Aerospace Engineering,
Delft University of Technology
, Kluyverweg 1, 2629 HS, Delft, The Netherlands
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Gerard van Bussel
Gerard van Bussel
Associate Professor
Faculty of Aerospace Engineering,
Delft University of Technology
, Kluyverweg 1, 2629 HS, Delft, The Netherlands
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Wouter Haans
Ph.D. student
Faculty of Aerospace Engineering,
Delft University of Technology
, Kluyverweg 1, 2629 HS, Delft, The Netherlandse-mail: w.haans@lr.tudelft.nl
Gijs van Kuik
Professor
Faculty of Aerospace Engineering,
Delft University of Technology
, Kluyverweg 1, 2629 HS, Delft, The Netherlands
Gerard van Bussel
Associate Professor
Faculty of Aerospace Engineering,
Delft University of Technology
, Kluyverweg 1, 2629 HS, Delft, The NetherlandsJ. Sol. Energy Eng. Aug 2008, 130(3): 031009 (14 pages)
Published Online: July 1, 2008
Article history
Received:
February 22, 2007
Revised:
October 30, 2007
Published:
July 1, 2008
Citation
Haans, W., van Kuik, G., and van Bussel, G. (July 1, 2008). "The Inverse Vortex Wake Model: A Measurement Analysis Tool." ASME. J. Sol. Energy Eng. August 2008; 130(3): 031009. https://doi.org/10.1115/1.2931508
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