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Title:
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Prediction of unsteady flow over airfoils using a quasi-simultaneous interaction method
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Author(s):
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Bijleveld, H.; Veldman, A.E.P.
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Published by:
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Publication date:
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ECN
Wind Energy
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5-4-2011
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ECN report number:
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Document type:
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ECN-M--11-045
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Conference Paper
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Number of pages:
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Full text:
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10
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Download PDF
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Abstract:
The unsteady flow over airfoils is determined by splitting the flow field into a viscous and inviscid region.
Interaction between these two regions is established by applying the strong quasi-simultaneous interaction
method of Veldman [11]. In this method, the boundary-layer is solved together with the interaction
law after which an inviscid calculation is carried out. For laminar and turbulent boundary-layer flows
over two-dimensional dented plates it is shown analytically and numerically that the quasi-simultaneous
interaction method removes the singularity at separation. Also, using either primary or characteristic
variables in the sets of equations in simulations yields the same result. This means that the determination
and use of characteristic directions of the viscous flow is feasible in the method ROTORFLOW 2D
which is developed by ECN Wind Energy.
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