This volume entitled "EUROPT - A European Initiative on Optimum Design in Aerodynamics" contains the results of the contributors during a workshop which took place in Barcelona in June 1992. This workshop was organized in the framp work of the Brite/Euram Aeronautics project "Optimum Design in Aerodynamics" (AERO-89-0026). The project brought together nine European partners from Acade my and Industry with big experience in numerical optimization techniques applif'd to automated optimum design. The manuscript is directed to the optimization field and its goal is to provide the reader with useful numerical optimization techniques for optimum design in aerody namIcs. The field of numerical optimization techniques has been growing since the early 50's. But only recently, with the recent advent of powerful computers. it has yielded real-life applications that demonstrate industrial potential for design purposes. Nowadays, optimization is at the stage where those scientists and engineers who have worked in the field are to be paid to apply numerical optimization to automated design of real problems, namely aerodynamic shapes in Aerospace Engineering. For the above reasons, it was evident that a Workshop on numerical optimization techniques for the validation of optimum design methods would be of interest to most of the partners involved in the AERO-S9-0026 project in order to compare in terms of accuracy and efficiency several optimization soft wares performed on the same selected flow problems.

Internationales Forschungsprogramm

Autorentext

Die Herausgeber arbeiten an den verschiedenen Partnerinstituten des Projekts.

Klappentext

This volume contains a set of different methodologies and solutions for a number of selected optimum design problems in Aerospace Engineering. The methodologies for the solution of these problems cover optimization and inverse problems, external and internal flows, subsonic and transsonic regimes, different flow solvers and different discretizations schemes. These were presented in a workshop during the EUROPT BRITE/ EURAM project. This book will be of interest to a wide range of readers, including engineers and scientists working in computing, optimization and control theory. Undergraduate and graduate students in computer science and aerospace engineering will also find the contents of this book a valuable reference. Dieser Band enthält Methoden und Lösungen für Probleme desoptimalen Designs in der Luftfahrt. Sie umfassen Fragestellung aus der Optimierung, der inversen Probleme, der inneren und äußeren Flüsse, Unter- und Überschall sowie verschiedene Diskretisierungsschemata. Die Beiträge stammen von einem Workshop, der während des BRIETE/ EURAM-Projekts EUROPT abgehalten wurde.

Inhalt

Introduction.- 2. Definition of the Problems for the Analysis.- 2.1 Test Case T1: Inverse Problem for a Nozzle.- 2.2 Test Case T2: Subsonic Optimization Problem for a Nozzle.- 2.3 Test Case T3: Transonic Optimization Problem for a Nozzle.- 2.4 Test Case T4: Inverse Problem for a 2D Single Airfoil.- 2.5 Test Case T6: Optimization Problem for a 2D Single Airfoil.- 2.6 Test Case T8: Test Case for Multi-Point 2D Airfoil Design.- 2.7 Test Case T10: Reconstruction Problem for a 2D Multi-Element Airfoil.- 2.8 Test Case T14: Design and Reconstruction Test Case for Single-Point 3D Wing Design.- 2.9 Test Case T17: Reconstruction Problem for a 3D Nozzle.- 3. Contributions to the Resolution of the Workshop Test Cases.- Contribution to problems T4 and T6 finite element GMRES and conjugate gradient solvers.- Wing design with a 3D-subsonic inverse panel method.- Direct optimization of transonic airfoils.- A residual correction method applied to 2D multi-point airfoil design and 3D single-point wing design.- Comparison of some optimization methods and their application in the shape optimization of lifting airfoils.- Shape optimization of an Euler flow in a nozzle.- Aerodynamic shape optimization using automatic adaptive remeshing.- Single-pass method for the solution of the 2D & 3D inverse potential problem.- 4. Description of the Graphic Software Used for the Workshop.- 5. Synthesis of the Workshop Test Cases.- 6. Conclusions and Further Comments.