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Three-dimensional unsteady Euler equations solutions on dynamic gridsA method is presented for solving the three-dimensional unsteady Euler equations on dynamic grids based on flux vector splitting. The equations are cast in curvilinear coordinates and a finite volume discretization is used for handling arbitrary geometries. The discretized equations are solved using an explicit upwind second-order predictor corrector scheme that is stable for a CFL of 2. Characteristic variable boundary conditions are developed and used for unsteady impermeable surfaces and for the far-field boundary. Dynamic-grid results are presented for an oscillating air-foil and for a store separating from a reflection plate. For the cases considered of stores separating from a reflection plate, the unsteady aerodynamic forces on the store are significantly different from forces obtained by steady-state aerodynamics with the body inclination angle changed to account for plunge velocity.
Document ID
19850058627
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Belk, D. M.
(USAF, Armament Laboratory, Eglin AFB FL, United States)
Janus, J. M.
(U.S. Naval Coastal Systems Center Panama City, FL, United States)
Whitfield, D. L.
(Mississippi State University Mississippi State, United States)
Date Acquired
August 12, 2013
Publication Date
July 1, 1985
Subject Category
Fluid Mechanics And Heat Transfer
Report/Patent Number
AIAA PAPER 85-1704
Accession Number
85A40778
Funding Number(s)
CONTRACT_GRANT: NAG1-226
CONTRACT_GRANT: F08635-82-K-0409
Distribution Limits
Public
Copyright
Other

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