Multidisciplinary Simulation of the Maneuvering of an Aircraft

A computational methodology for the simulation of the transient aeroelastic response of an unrestrained and flexible aircraft during high-G maneuvers is presented. The key components of this methodology are: (a) a three-field formulation for coupled fluid/structure interaction problems; (b) a second-order time-accurate and geometrically conservative flow solver for CFD computations on unstructured dynamic meshes; (c) a corotational finite element method for the solution of geometrically nonlinear and unrestrained structural dynamics problems; (d) a robust method for updating an unrestrained and unstructured moving fluid mesh; and (e) a second-order time-accurate staggered algorithm for time-integrating the coupled fluid/structure semi-discrete equations of motion. This computational methodology is illustrated with the simulation on a parallel processor of several three-dimensional high-G pullup maneuvers of the Langley Fighter in the transonic regime, using a detailed finite element aeroelastic model.

[1]  B. V. Leer,et al.  Towards the Ultimate Conservative Difference Scheme , 1997 .

[2]  Hans J. Stetter,et al.  The Defect Correction Approach , 1984 .

[3]  J. Hyvärinen,et al.  An Arbitrary Lagrangian-Eulerian finite element method , 1998 .

[4]  R. Quinn,et al.  Equations of motion for maneuvering flexible spacecraft , 1987 .

[5]  Charbel Farhat,et al.  Second-order time-accurate and geometrically conservative implicit schemes for flow computations on unstructured dynamic meshes , 1999 .

[6]  P. Roe.  Approximate Riemann Solvers, Parameter Vectors, and Difference Schemes , 1997 .

[7]  Charbel Farhat,et al.  Partitioned procedures for the transient solution of coupled aeroelastic problems , 2001 .

[8]  Hervé Guillard,et al.  A Second Order Defect Correction Scheme for Unsteady Problems , 1996 .

[9]  J. Batina.  Unsteady Euler airfoil solutions using unstructured dynamic meshes , 1989 .

[10]  Martin Goland,et al.  Principles of aeroelasticity , 1975 .

[11]  Charbel Farhat,et al.  Higher-Order Subiteration-Free Staggered Algorithm for Nonlinear Transient Aeroelastic Problems , 1998 .

[12]  C. Farhat,et al.  Mixed explicit/implicit time integration of coupled aeroelastic problems: Three‐field formulation, geometric conservation and distributed solution , 1995 .

[13]  R. D. Milne,et al.  Some remarks on the dynamics of deformable bodies. , 1968 .

[14]  Osama A. Kandil,et al.  Unsteady vortex-dominated flows around maneuvering wings over a wide range of Mach numbers , 1988 .

[15]  C. Rankin,et al.  An element independent corotational procedure for the treatment of large rotations , 1986 .

[16]  Charbel Farhat,et al.  Geometric conservation laws for flow problems with moving boundaries and deformable meshes, and their impact on aeroelastic computations , 1996 .

[17]  P. Tallec,et al.  Load and motion transfer algorithms for fluid/structure interaction problems with non-matching discrete interfaces: Momentum and energy conservation, optimal discretization and application to aeroelasticity , 1998 .

[18]  Charbel Farhat,et al.  Geometric conservation laws for aeroelastic computations using unstructured dynamic meshes , 1995 .

[19]  W. P. Rodden,et al.  Equations of motion of a quasisteady flight vehicle utilizing restrained static aeroelastic characteristics , 1985 .

[20]  Charbel Farhat,et al.  Matching fluid and structure meshes for aeroelastic computations : a parallel approach , 1995 .

[21]  C. Farhat,et al.  Torsional springs for two-dimensional dynamic unstructured fluid meshes , 1998 .

[22]  J. Halleux,et al.  An arbitrary lagrangian-eulerian finite element method for transient dynamic fluid-structure interactions , 1982 .

[23]  John A. Ekaterinaris,et al.  Computation of oscillating airfoil flows with one- and two-equation turbulence models , 1994 .

[24]  Charbel Farhat,et al.  A Minimum Overlap Restricted Additive Schwarz Preconditioner and Applications in 3D Flow Simulations , 1998 .