Navier-Stokes solutions for an oscillating double-delta wing
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Authors
Ekaterinaris, John A.
Schiff, Lewis B.
Subjects
COMPUTATIONAL FLUID DYNAMICS
DELTA WINGS
UNSTEADY FLOW
VORTEX BREAKDOWN
WING OSCILLATIONS
ANGLE OF ATTACK
GRID GENERATION (MATHEMATICS)
LEADING EDGES
NAVIER-STOKES EQUATION
STEADY STATE
DELTA WINGS
UNSTEADY FLOW
VORTEX BREAKDOWN
WING OSCILLATIONS
ANGLE OF ATTACK
GRID GENERATION (MATHEMATICS)
LEADING EDGES
NAVIER-STOKES EQUATION
STEADY STATE
Advisors
Date of Issue
1991-06
Date
Jun 01, 1991
Publisher
Language
Abstract
An upwind-biased implicit scheme is used to investigate steady-state and unsteady Navier-Stokes solutions of the vortical flow over a double-delta wing configuration. The governing equations are solved numerically with a fully upwind, implicit, iterative, and factorized numerical scheme. Steady-state solutions for fixed angles of attack and unsteady solutions for a sinusoidal oscillatory motion are obtained. The steady-state solutions on the baseline grid are in agreement with the experiment, and grid refinements show some improvements of the predictions. The higher-order accuracy of the present scheme yields equivalent solutions on smaller grid densities compared to solutions obtained with a second-order accurate method on larger grids. As the angle of attack increases, the grid resolution requirements for adequate resolution of the leeward-side vortical flowfield become very severe. The unsteady solutions are in general agreement with the measurements and show a qualitative correlation with the experiment.
Type
Preprint
Description
Series/Report No
Department
Organization
Ames Research Center
Identifiers
NPS Report Number
Sponsors
Funding
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.