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A Hybrid Boundary Element-Finite Volume Method for Unsteady Transonic Airfoil FlowsA hybrid boundary element finite volume method for unsteady transonic flow computation has been developed. In this method, the unsteady Euler equations in a moving frame of reference are solved in a small embedded domain (inner domain) around the airfoil using an implicit finite volume scheme. The unsteady full-potential equation, written in the same frame of reference and in the form of the Poisson equation. is solved in the outer domain using the integral equation boundary element method to provide the boundary conditions for the inner Euler domain. The solution procedure is a time-accurate stepping procedure, where the outer boundary conditions for the inner domain are updated using the integral equation -- boundary element solution over the outer domain. The method is applied to unsteady transonic flows around the NACA0012 airfoil undergoing pitching oscillation and ramp motion. The results are compared with those of an implicit Euler equation solver, which is used throughout a large computational domain, and experimental data.
Document ID
19960020980
Acquisition Source
Langley Research Center
Document Type
Reprint (Version printed in journal)
Authors
Hu, Hong
(Hampton Univ. VA United States)
Kandil, Osama A.
(Old Dominion Univ. Norfolk, VA United States)
Date Acquired
August 17, 2013
Publication Date
February 1, 1996
Publication Information
Publication: Aeroelastic, CFD, and Dynamic Computation and Optimization for Buffet and Flutter Applications
Publisher: Elsevier Science Publishers Ltd.
Subject Category
Aerodynamics
Accession Number
96N24485
Distribution Limits
Public
Copyright
Public Use Permitted.
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