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Numerical prediction of vortex cores of the leading and trailing edges of delta wingsThe purpose of the present paper is to predict the roll-up of the vortex sheets emanating from the leading- and trailing-edges of delta wings with emphasis on the interaction of vortex cores beyond the trailing edge. The motivation behind the present work is the recent experimental data published by Hummel. The Nonlinear Discrete-Vortex method (NDV-method) is modified and extended to predict the leading- and trailing-vortex cores beyond the trailing edge. The present model alleviates the problems previously encountered in predicting satisfactory pressure distributions. This is accomplished by lumping the free-vortex lines during the iteration procedure. The leading- and trailing-edge cores and their feeding sheets are obtained as parts of the solution. The numerical results show that the NDV-method is successful in confirming the formation of a trailing-edge core with opposite circulation and opposite roll-up to those of the leading-edge core. This work is a breakthrough in the high angle of attack aerodynamics and moreover, it is the first numerical prediction done on this problem
Document ID
19810030071
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kandil, O. A.
(Old Dominion University Norfolk, Va., United States)
Date Acquired
August 11, 2013
Publication Date
October 1, 1980
Subject Category
Aerodynamics
Meeting Information
Meeting: Congress of the International Council of the Aeronautical Sciences
Location: Munich
Country: Germany
Start Date: October 12, 1980
End Date: October 17, 1980
Sponsors: International Council of the Aeronautical Sciences
Accession Number
81A14475
Funding Number(s)
CONTRACT_GRANT: NSG-1560
Distribution Limits
Public
Copyright
Other

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