Vortical flows over delta wings and numerical prediction of vortex breakdown
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Authors
Ekaterinaris, J.A.
Schiff, Lewis B.
Subjects
COMPUTATIONAL FLUID DYNAMICS
COMPUTATIONAL GRIDS
DELTA WINGS
NUMERICAL FLOW VISUALIZATION
VORTEX BREAKDOWN
VORTICITY
ANGLE OF ATTACK
BOUNDARY LAYER SEPARATION
FLOW CHARACTERISTICS
FLOW DISTRIBUTION
COMPUTATIONAL GRIDS
DELTA WINGS
NUMERICAL FLOW VISUALIZATION
VORTEX BREAKDOWN
VORTICITY
ANGLE OF ATTACK
BOUNDARY LAYER SEPARATION
FLOW CHARACTERISTICS
FLOW DISTRIBUTION
Advisors
Date of Issue
1990-01
Date
Jan 01, 1990
Publisher
Language
Abstract
Navier-Stokes solutions of subsonic vortical flow over a 75 deg sweep delta wing with a sharp leading edge are presented. The sensitivity of the solution to the numerical scheme is examined using both a partially upwind scheme and a scheme with central differencing in all directions. At moderate angles of attack, no vortex breakdown is observed, whereas the higher angle-of-attack cases exhibit breakdown. The effect of numerical grid density is investigated, and solutions that are obtained with various grid densities are compared with experimental data. An embedded grid approach is implemented to enable higher resolution in selected isolated flow regions, such as the leeward-side surface, the leading-edge vortical flow, and the vortex breakdown region.
Type
Preprint
Description
Series/Report No
Department
Organization
Ames Research Center
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.