Independent Two-Fields Solution for Full-Potential Unsteady Transonic Flows
The paper introduces a new approach for the numerical solution of full-potential unsteady flows based on an independent approximation of the density and velocity potential fields. The solution procedure relies on an unstructured, node-based, finite volume approximation, with linear shape functions a...
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| Veröffentlicht in: | AIAA journal 2010-07, Vol.48 (7), p.1391-1402 |
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| creator | Parrinello, A Mantegazza, P |
| description | The paper introduces a new approach for the numerical solution of full-potential unsteady flows based on an independent approximation of the density and velocity potential fields. The solution procedure relies on an unstructured, node-based, finite volume approximation, with linear shape functions and nonreflecting farfield boundary conditions. An improved upwind density biasing allows us to stabilize the solution in supersonic regions. In view of linearized aeroelastic stability and response analyses, unsteady boundary conditions are accounted for by means of a density flow transpiration. Time marching solutions are dealt using first/second-order implicit schemes, whose unconditional linearized stability properties are demonstrated. A few applications are presented to validate the method. [PUBLICATION ABSTRACT] |
| doi_str_mv | 10.2514/1.J050013 |
| format | Article |
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The solution procedure relies on an unstructured, node-based, finite volume approximation, with linear shape functions and nonreflecting farfield boundary conditions. An improved upwind density biasing allows us to stabilize the solution in supersonic regions. In view of linearized aeroelastic stability and response analyses, unsteady boundary conditions are accounted for by means of a density flow transpiration. Time marching solutions are dealt using first/second-order implicit schemes, whose unconditional linearized stability properties are demonstrated. A few applications are presented to validate the method. 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| fulltext | fulltext |
| identifier | ISSN: 0001-1452 |
| ispartof | AIAA journal, 2010-07, Vol.48 (7), p.1391-1402 |
| issn | 0001-1452 1533-385X |
| language | eng |
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| source | Alma/SFX Local Collection |
| subjects | Aerodynamics Applied fluid mechanics Approximation Boundary conditions Compressible flows shock and detonation phenomena Computational methods in fluid dynamics Density Exact sciences and technology Far fields Flow control Flow velocity Fluid dynamics Fundamental areas of phenomenology (including applications) Laminar flows Mathematical analysis Mathematical models Physics Potential fields Potential flows Shape functions Stability Supersonic aircraft Time marching Transonic flow Transonic flows Transpiration Unsteady Unsteady flow Validation studies |
| title | Independent Two-Fields Solution for Full-Potential Unsteady Transonic Flows |
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