A Framework for Fast CFD-based Aero-Servo-Thermo-Elastic Analysis
A Framework for Fast CFD-based Aero-Servo-Thermo-Elastic Analysis
A Framework for Fast CFD-based Aero-Servo-Thermo-Elastic Analysis
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Politecnico di Milano<br />
Dipartimento di Ingegneria <strong>Aero</strong>spaziale<br />
Dottorato di Ricerca di Ingegneria <strong>Aero</strong>spaziale (XXVI ciclo)<br />
A <strong>Framework</strong> <strong>for</strong> <strong>Fast</strong> <strong>CFD</strong>-<strong>based</strong><br />
<strong>Aero</strong>-<strong>Servo</strong>-<strong>Thermo</strong>-<strong>Elastic</strong> <strong>Analysis</strong><br />
PhD student: Matteo Ripepi<br />
Advisor: Prof. Paolo Mantegazza<br />
March 2, 2011
PhD research proposal PhD work planning<br />
Outline<br />
1 PhD research proposal<br />
Introduction<br />
Research project<br />
2 PhD work planning<br />
Courses<br />
Software<br />
Work planning<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Intro Multimodel ROM Mesh Implicit <strong>Thermo</strong><br />
Outline<br />
1 PhD research proposal<br />
Introduction<br />
Research project<br />
2 PhD work planning<br />
Courses<br />
Software<br />
Work planning<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Intro Multimodel ROM Mesh Implicit <strong>Thermo</strong><br />
Computational aeroservoelasticity<br />
Load factor<br />
3<br />
2<br />
1<br />
0<br />
Loads database prediction<br />
Flaps Down<br />
is fundamental in the overall aircraft design and development<br />
involves a large amount of aeroelastic analyses<br />
Flaps Up<br />
<strong>CFD</strong> mostly done<br />
near cruise point<br />
VEAS<br />
High-fidelity computational aeroservoelasticity<br />
still too computationally expensive <strong>for</strong> the preliminary design stage,<br />
and there<strong>for</strong>e used <strong>for</strong> a limited number of cases (e.g. flutter).<br />
high potential <strong>for</strong> the prediction of critical flight loads<br />
necessary to address new challenges in aircraft design<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Intro Multimodel ROM Mesh Implicit <strong>Thermo</strong><br />
Research project<br />
Purpose of the research<br />
Accelerate and improve the efficiency and accuracy of high-fidelity<br />
computational aeroservoelastic analysis<br />
Developments towards a faster CAE <strong>based</strong> loads analysis process:<br />
Variable fidelity multimodel multidomain coupling approach<br />
New reduced order modelling techniques<br />
Mesh motion enhancements<br />
Implicit solver <strong>for</strong> <strong>CFD</strong><br />
Thermal solver <strong>for</strong> aerothermoelasticity<br />
Accuracy/fidelity<br />
Area of<br />
interest<br />
Potential<br />
Methods<br />
Euler<br />
Methods<br />
Navier-Stokes<br />
Methods<br />
Computational resources (cost/time)<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Intro Multimodel ROM Mesh Implicit <strong>Thermo</strong><br />
Research project<br />
Developments towards a faster CAE <strong>based</strong> loads analysis process:<br />
Variable fidelity multimodel multidomain coupling approach<br />
New reduced order modelling techniques<br />
Mesh motion enhancements<br />
Implicit solver <strong>for</strong> <strong>CFD</strong><br />
Thermal solver <strong>for</strong> aerothermoelasticity<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Intro Multimodel ROM Mesh Implicit <strong>Thermo</strong><br />
Research project<br />
Developments towards a faster CAE <strong>based</strong> loads analysis process:<br />
Variable fidelity multimodel multidomain coupling approach<br />
New reduced order modelling techniques<br />
Mesh motion enhancements<br />
Implicit solver <strong>for</strong> <strong>CFD</strong><br />
Thermal solver <strong>for</strong> aerothermoelasticity<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Intro Multimodel ROM Mesh Implicit <strong>Thermo</strong><br />
Research project<br />
Variable fidelity multimodel multidomain coupling approach<br />
FSI <strong>based</strong> on a partitioned approach, coupling solvers with<br />
different levels of fidelity to speed-up full order aeroelastic analysis.<br />
Coupling in time ⇒ hierarchical approach<br />
Coupling in space ⇒ hybrid approach<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Intro Multimodel ROM Mesh Implicit <strong>Thermo</strong><br />
Research project<br />
Variable fidelity multimodel multidomain coupling approach<br />
FSI <strong>based</strong> on a partitioned approach, coupling solvers with<br />
different levels of fidelity to speed-up full order aeroelastic analysis.<br />
Coupling in time ⇒ hierarchical approach<br />
Coupling in space ⇒ hybrid approach<br />
Switch during the simulation between full/low order model and<br />
multigrid to accelerate the convergence of high fidelity subiterations.<br />
Adaptive ROM by basis enrichment<br />
During the RANS simulation ⇒ extract low-order subspace<br />
ROM used to continue the simulation while the solution error<br />
is sufficiently small.<br />
If error rises ⇒ return to a full order model initialised by ROM<br />
RANS simulation will continue and will update the subspace<br />
until the ROM can be used again.<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Intro Multimodel ROM Mesh Implicit <strong>Thermo</strong><br />
Research project<br />
Variable fidelity multimodel multidomain coupling approach<br />
FSI <strong>based</strong> on a partitioned approach, coupling solvers with<br />
different levels of fidelity to speed-up full order aeroelastic analysis.<br />
Coupling in time ⇒ hierarchical approach<br />
Coupling in space ⇒ hybrid approach<br />
Switch during the simulation between full/low order model and<br />
multigrid to accelerate the convergence of high fidelity subiterations.<br />
Low-fidelity on coarse mesh<br />
prolongation<br />
⇄<br />
restriction<br />
High-fidelity on fine mesh<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Intro Multimodel ROM Mesh Implicit <strong>Thermo</strong><br />
Research project<br />
Variable fidelity multimodel multidomain coupling approach<br />
FSI <strong>based</strong> on a partitioned approach, coupling solvers with<br />
different levels of fidelity to speed-up full order aeroelastic analysis.<br />
Coupling in time ⇒ hierarchical approach<br />
Coupling in space ⇒ hybrid approach<br />
Low/full order domain decomposition<br />
Criterion <strong>for</strong> the distance between interface and wall boundary<br />
Interface operator (conservative, stability, robustness, . . . )<br />
Numerical scheme to solve the low-full order coupled model<br />
Far field<br />
POTENTIAL/ROM<br />
Ω<br />
out Γ<br />
Ω<br />
in<br />
Near field<br />
RANS<br />
ROM used locally where the<br />
solution error is sufficiently small.<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Intro Multimodel ROM Mesh Implicit <strong>Thermo</strong><br />
Research project<br />
Developments towards a faster CAE <strong>based</strong> loads analysis process:<br />
Variable fidelity multimodel coupling approach<br />
New reduced order modelling techniques<br />
Mesh motion enhancements<br />
Implicit solver <strong>for</strong> <strong>CFD</strong><br />
Thermal solver <strong>for</strong> aerothermoelasticity<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Intro Multimodel ROM Mesh Implicit <strong>Thermo</strong><br />
Research project<br />
Developments towards a faster CAE <strong>based</strong> loads analysis process:<br />
Variable fidelity multimodel coupling approach<br />
New reduced order modelling techniques<br />
Mesh motion enhancements<br />
Implicit solver <strong>for</strong> <strong>CFD</strong><br />
Thermal solver <strong>for</strong> aerothermoelasticity<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Intro Multimodel ROM Mesh Implicit <strong>Thermo</strong><br />
Research project<br />
New reduced order modelling techniques<br />
ROM requires a set of instantaneous flow solutions (snapshots)<br />
Projection of onto a reduced subspace<br />
Direct identification of a system of the required <strong>for</strong>m<br />
Hilbert-Huang Trans<strong>for</strong>m decomposition of aeroelastic system<br />
adaptive data analysis <strong>for</strong> nonlinear and nonstationary processes.<br />
Subspace-<strong>based</strong> identification methods<br />
identify a state-space model directly from input-output data<br />
Global aeroelastic ROM<br />
parametric input space<br />
interpolation of flight data<br />
(full/low order simulations)<br />
Polinomial response surface<br />
Kriging/Co-Kriging<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Intro Multimodel ROM Mesh Implicit <strong>Thermo</strong><br />
Research project<br />
Developments towards a faster CAE <strong>based</strong> loads analysis process:<br />
Variable fidelity multimodel coupling approach<br />
New reduced order modelling techniques<br />
Mesh motion enhancements<br />
Implicit solver <strong>for</strong> <strong>CFD</strong><br />
Thermal solver <strong>for</strong> aerothermoelasticity<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Intro Multimodel ROM Mesh Implicit <strong>Thermo</strong><br />
Research project<br />
Developments towards a faster CAE <strong>based</strong> loads analysis process:<br />
Variable fidelity multimodel coupling approach<br />
New reduced order modelling techniques<br />
Mesh motion enhancements<br />
Implicit solver <strong>for</strong> <strong>CFD</strong><br />
Thermal solver <strong>for</strong> aerothermoelasticity<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Intro Multimodel ROM Mesh Implicit <strong>Thermo</strong><br />
Research project<br />
Mesh motion enhancements<br />
Robust dynamic mesh handling <strong>for</strong> aeroservoelastic simulation<br />
purposes, trough the use of a mesh motion solver and topological<br />
optimization (e.g smoothing, refinement, edge/face swapping).<br />
Mesquite library<br />
[Menon et al.,2010]<br />
Large structural de<strong>for</strong>mations/motions keeping mesh quality<br />
Control surfaces motion<br />
Dual-mesh: cell-centered (CC) ⇄ cell-vertex (CV) discretization<br />
accuracy in the computation of derivatives<br />
direct computation of the pressure on the wall<br />
problem: may create non-convex cells near the boundary<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Intro Multimodel ROM Mesh Implicit <strong>Thermo</strong><br />
Research project<br />
Developments towards a faster CAE <strong>based</strong> loads analysis process:<br />
Variable fidelity multimodel coupling approach<br />
New reduced order modelling techniques<br />
Mesh motion enhancements<br />
Implicit solver <strong>for</strong> <strong>CFD</strong><br />
Thermal solver <strong>for</strong> aerothermoelasticity<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Intro Multimodel ROM Mesh Implicit <strong>Thermo</strong><br />
Research project<br />
Developments towards a faster CAE <strong>based</strong> loads analysis process:<br />
Variable fidelity multimodel coupling approach<br />
New reduced order modelling techniques<br />
Mesh motion enhancements<br />
Implicit solver <strong>for</strong> <strong>CFD</strong><br />
Thermal solver <strong>for</strong> aerothermoelasticity<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Intro Multimodel ROM Mesh Implicit <strong>Thermo</strong><br />
Research project<br />
Implicit solver <strong>for</strong> <strong>CFD</strong><br />
Numerical scalability is required to take full advantage of parallel<br />
computing techniques.<br />
Newton-Krylov methods<br />
standard <strong>for</strong> solvers of implicit, large-scale, nonlinear systems<br />
fast convergence<br />
ability to effectively use scalable preconditioners.<br />
Preconditioner<br />
multigrid techniques<br />
approximate factorization of Jacobian (Jacobian-Free method)<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Intro Multimodel ROM Mesh Implicit <strong>Thermo</strong><br />
Research project<br />
Developments towards a faster CAE <strong>based</strong> loads analysis process:<br />
Variable fidelity multimodel coupling approach<br />
New reduced order modelling techniques<br />
Mesh motion enhancements<br />
Implicit solver <strong>for</strong> <strong>CFD</strong><br />
Thermal solver <strong>for</strong> aerothermoelasticity<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Intro Multimodel ROM Mesh Implicit <strong>Thermo</strong><br />
Research project<br />
Developments towards a faster CAE <strong>based</strong> loads analysis process:<br />
Variable fidelity multimodel coupling approach<br />
New reduced order modelling techniques<br />
Mesh motion enhancements<br />
Implicit solver <strong>for</strong> <strong>CFD</strong><br />
Thermal solver <strong>for</strong> aerothermoelasticity<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Intro Multimodel ROM Mesh Implicit <strong>Thermo</strong><br />
Research project<br />
Thermal solver <strong>for</strong> aerothermoelasticity<br />
Thermal solver <strong>for</strong> <strong>CFD</strong>-<strong>based</strong> aerodynamic heating<br />
aero-thermo-elasticity<br />
hypersonic aeroelastic stability problems<br />
aeroelastic analysis that accounts <strong>for</strong> the effect of thermal<br />
stresses and material degradation.<br />
<strong>Aero</strong>thermoelasticity will also take advantage of ROM tecniques.<br />
q aero<br />
q strd<br />
q cond<br />
q rad<br />
wing<br />
structure<br />
Exposed<br />
surface/TPS<br />
Heat<br />
transfer<br />
<strong>Aero</strong>dynamic<br />
<strong>for</strong>ces<br />
Structural<br />
displacements<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis<br />
Inertial<br />
effects
PhD research proposal PhD work planning Intro Multimodel ROM Mesh Implicit <strong>Thermo</strong><br />
Research project<br />
Thermal solver <strong>for</strong> aerothermoelasticity<br />
Thermal solver <strong>for</strong> <strong>CFD</strong>-<strong>based</strong> aerodynamic heating<br />
aero-thermo-elasticity<br />
hypersonic aeroelastic stability problems<br />
aeroelastic analysis that accounts <strong>for</strong> the effect of thermal<br />
stresses and material degradation.<br />
<strong>Aero</strong>thermoelasticity will also take advantage of ROM tecniques.<br />
q aero<br />
q strd<br />
q cond<br />
q rad<br />
wing<br />
structure<br />
Exposed<br />
surface/TPS<br />
Control<br />
Heat<br />
transfer<br />
<strong>Aero</strong>dynamic<br />
<strong>for</strong>ces<br />
Structural<br />
displacements<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis<br />
Inertial<br />
effects
PhD research proposal PhD work planning Intro Multimodel ROM Mesh Implicit <strong>Thermo</strong><br />
Research project<br />
Developments towards a faster CAE <strong>based</strong> loads analysis process:<br />
Variable fidelity multimodel coupling approach<br />
New reduced order modelling techniques<br />
Mesh motion enhancements<br />
Implicit solver <strong>for</strong> <strong>CFD</strong><br />
Thermal solver <strong>for</strong> aerothermoelasticity<br />
<strong>Aero</strong>elastic applications<br />
highly nonlinear flow phenomena arising in critical loads conditions<br />
transonic flutter<br />
LCO involving nonlinear aerodynamics<br />
buffeting<br />
transonic flow with shocks<br />
and flow separation<br />
gust response<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Courses Tools Planning<br />
Outline<br />
1 PhD research proposal<br />
Introduction<br />
Research project<br />
2 PhD work planning<br />
Courses<br />
Software<br />
Work planning<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Courses Tools Planning<br />
PhD work planning<br />
Courses<br />
Credits<br />
Functional <strong>Analysis</strong> and PDEs (F. Gazzola) 5<br />
Dynamics of Multibody Systems (P. Masarati, F. Cheli) 10<br />
Computational Gasdynamics (L. Quartapelle) 5<br />
Model Identification and Data <strong>Analysis</strong> (S. Bittanti) 5<br />
Dynamic of Nonlinear Systems (S. Rinaldi) 5<br />
Other activities<br />
Summer schools, seminars, publications on journals, presentations<br />
at international conferences and exchange periods at <strong>for</strong>eign<br />
universities.<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Courses Tools Planning<br />
PhD work planning<br />
Tools<br />
High-fidelity <strong>CFD</strong> solver <strong>Aero</strong>Foam (<strong>based</strong> on OpenFOAM)<br />
[Romanelli, Serioli, Mantegazza, 2010].<br />
In-house potential flow solver [Parinello, Mantegazza, 2010]<br />
Finite element solver Code-Aster<br />
MultiBody Dynamics (MBDyn)<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
PhD research proposal PhD work planning Courses Tools Planning<br />
PhD work planning<br />
Bibliographic research<br />
Familiarization with C++, PETSc, <strong>Aero</strong>Foam, CodeAster, MBDyn<br />
Development and implementation of dynamic mesh motion solver<br />
Development and implementation of model order reduction techniques<br />
Development and implementation of low/high fidelity aeroelastic coupling<br />
Development and implementation of implicit solver <strong>for</strong> <strong>CFD</strong><br />
Development and implementation of thermal solver <strong>for</strong> aero-thermo-elasticity<br />
Validation and assessment through the application to test cases and real cases<br />
Courses<br />
Bibliography<br />
Codes tutorial<br />
Multi-model solvers<br />
Mesh solver<br />
ROMs techniques<br />
Implicit solver<br />
Thermal solver<br />
Applications<br />
Doctoral thesis<br />
2010 2011 2012<br />
1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
Bibliography<br />
Dowell, E.H. and Hall, K.C., “Modeling of Fluid-Structure Interaction”,<br />
Annual Reviews of Fluid Mechanics, 33:445-490, 2001.<br />
Schuster, D.M, Liu, D.D, Huttsell, L.J., “Computational aeroelasticity:<br />
success, progress, challenge”, J. Aircraft, 40(5):843-56, 2003.<br />
Lucia, D.J., Beran, P.S., Silva, W.A., “Reduced-order modeling: New<br />
approaches <strong>for</strong> computational physics”, Progress in <strong>Aero</strong>space Sciences, Vol.<br />
40, no. 1-2, pp. 51-117. Feb. 2004.<br />
A. Parinello, P. Mantegazza, “Independent Two-Fields Solution <strong>for</strong><br />
Full-Potential Unsteady Transonic Flows”, AIAA Journal, vol.48 no.7<br />
(1391-1402), 2010.<br />
Romanelli, G., Serioli, E., Mantegazza, P., “A “Free” Approach to<br />
Computational <strong>Aero</strong>elasticity”, 48th AIAA <strong>Aero</strong>space Sciences Meeting<br />
Including the New Horizons Forum and <strong>Aero</strong>space Exposition. Orlando, Florida,<br />
Jan. 4-7, 2010.<br />
Culler, A.J. and McNamara, J.J., “Studies on Fluid-Thermal-Structural<br />
Coupling <strong>for</strong> <strong>Aero</strong>thermoelasticity in Hypersonic Flow”, AIAA Journal, Vol.<br />
48, No. 8, August 2010, pg. 1721-1738.<br />
<strong>Aero</strong>Foam; http://www.aero.polimi.it/freecase/<br />
MultiBody Dynamics (MBDyn); http://www.mbdyn.org/<br />
Matteo Ripepi <strong>Fast</strong> high-fidelity aero-servo-thermo-elastic analysis
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