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Numerical simulation of the effects of variation of angle of attack and sweep angle on vortex breakdown over delta wingsIn the present investigation of the vortical flowfield structure over delta wings at high angles of attack, three-dimensional Navier-Stokes numerical simulations were conducted to predict the complex leeward flowfield characteristics; these encompass leading-edge separation, secondary separation, and vortex breakdown. Attention is given to the effect on solution accuracy of circumferential grid-resolution variations in the vicinity of the wing leading edge, and well as to the effect of turbulence modeling on the solutions. When a critical angle-of-attack was reached, bubble-type vortex breakdown was found. With further angle-of-attack increase, a change from bubble-type to spiral-type vortex breakdown was predicted by the numerical solution.
Document ID
19900058795
Document Type
Conference Paper
Authors
Ekaterinaris, J. A. (NASA Ames Research Center; Navy-NASA Joint Institute of Aeronautics Moffett Field, CA, United States)
Schiff, Lewis B. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Subject Category
AERODYNAMICS
Report/Patent Number
AIAA PAPER 90-3000
Meeting Information
AIAA Applied Aerodynamics Conference(Portland, OR)
Distribution Limits
Public
Copyright
Other