Aerodynamic Design Optimization of Unstructured Grid with a Continuous Adjoint Formulation PDF Download
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Author: W. Kyle Anderson
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: W. Kyle Anderson
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: W. Kyle Anderson
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 52
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Book Description
Author: Dominique Thévenin
Publisher: Springer Science & Business Media
ISBN: 3540721533
Category : Technology & Engineering
Languages : en
Pages : 301
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Book Description
The numerical optimization of practical applications has been an issue of major importance for the last 10 years. It allows us to explore reliable non-trivial configurations, differing widely from all known solutions. The purpose of this book is to introduce the state-of-the-art concerning this issue and many complementary applications are presented.
Author: Bijoyendra Nath
Publisher:
ISBN:
Category :
Languages : en
Pages : 162
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Book Description
For the optimization process, a constrained nonlinear programming package which uses a sequential quadratic programming algorithm is used. This study presents the process of analytically obtaining the exact discrete sensitivity derivatives and computationally cost-effective algorithms to efficiently use them in a design environment. Storage issues are circumvented by developing algorithms which perform matrix-vector operations during the construction itself. To validate the unstructured shape optimization procedure, an arbitrary symmetrical airfoil is optimized in an inviscid transonic flow regime.
Author: W. Kyle Anderson
Publisher:
ISBN:
Category :
Languages : en
Pages : 14
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Book Description
Author: D. Keyes
Publisher: Elsevier
ISBN: 008053838X
Category : Mathematics
Languages : en
Pages : 477
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Book Description
Contributed presentations were given by over 50 researchers representing the state of parallel CFD art and architecture from Asia, Europe, and North America. Major developments at the 1999 meeting were: (1) the effective use of as many as 2048 processors in implicit computations in CFD, (2) the acceptance that parallelism is now the 'easy part' of large-scale CFD compared to the difficulty of getting good per-node performance on the latest fast-clocked commodity processors with cache-based memory systems, (3) favorable prospects for Lattice-Boltzmann computations in CFD (especially for problems that Eulerian and even Lagrangian techniques do not handle well, such as two-phase flows and flows with exceedingly multiple-connected demains with a lot of holes in them, but even for conventional flows already handled well with the continuum-based approaches of PDEs), and (4) the nascent integration of optimization and very large-scale CFD. Further details of Parallel CFD'99, as well as other conferences in this series, are available at http://www.parcfd.org
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781725072091
Category :
Languages : en
Pages : 28
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Book Description
An aerodynamic design algorithm for turbulent flows using unstructured grids is described. The current approach uses adjoint (costate) variables for obtaining derivatives of the cost function. The solution of the adjoint equations is obtained using an implicit formulation in which the turbulence model is fully coupled with the flow equations when solving for the costate variables. The accuracy of the derivatives is demonstrated by comparison with finite-difference gradients and a few example computations are shown. In addition, a user interface is described which significantly reduces the time required for setting up the design problems. Recommendations on directions of further research into the Navier Stokes design process are made. Anderson, W. Kyle and Bonhaus, Daryl L. Langley Research Center NASA-TM-112867, NAS 1.15:112867 RTOP 522-31-21-01...
Author: Nobuyuki Satofuka
Publisher: Springer Science & Business Media
ISBN: 9783540414599
Category : Gardening
Languages : en
Pages : 868
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Book Description
These proceedings contain a selection of refereed contributions as a source of reference for all those interested in the state of the art in computational fluid dynamics. The conference brings together physicists, mathematicians and engineers to review and share recent advances in the field.
Author: American Institute of Aeronautics and Astronautics
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1112
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Book Description
Author: Norbert Kroll
Publisher: Springer Science & Business Media
ISBN: 3642040934
Category : Technology & Engineering
Languages : en
Pages : 311
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Book Description
This volume contains results of the German CFD initiative MEGADESIGN which combines CFD development activities from DLR, universities and aircraft industry. Based on the DLR flow solvers FLOWer and TAU the main objectives of the four-years project is to ensure the prediction accuracy with a guaranteed error bandwidth for certain aircraft configurations at design conditions, to reduce the simulation turn-around time for large-scale applications significantly, to improve the reliability of the flow solvers for full aircraft configurations in the complete flight regime, to extend the flow solvers to allow for multidisciplinary simulations and to establish numerical shape optimization as a vital tool within the aircraft design process. This volume highlights recent improvements and enhancements of the flow solvers as well as new developments with respect to aerodynamic and multidisciplinary shape optimization. Improved numerical simulation capabilities are demonstrated by several industrial applications.
