Schröder / Radespiel / Rossow Hermann Schlichting - 100 Years

Scientific Colloquium Celebrating the Anniversary of His Birthday, Braunschweig, Germany 2007
1. Auflage 2009
ISBN: 978-3-540-95998-4
Verlag: Springer-Verlag
Format: PDF
Kopierschutz: Adobe DRM (»Systemvoraussetzungen)

E-Book, Englisch, 189 Seiten

Hermann Schlichting is one of the internationally leading scientists in the field of th fluid mechanics during the 20 century. He contributed largely to modern theories of viscous flows and aircraft aerodynamics. His famous monographies Boundary Layer Theory and Aerodynamics of Aircraft are known worldwide and they appeared in six languages. He held Chairs of Aerodynamics and Fluid Mechanics at Technische U- versität Braunschweig during 37 years and directed the Institute of Aerodynamics of the Deutsche Forschungsanstalt für Luftfahrt in Braunschweig. He also directed the Aerodynamische Versuchsanstalt Göttingen and served in the Executive Board of the German Aerospace Center (DFVLR). Hermann Schlichting played a leading role in the rebuilding of aerospace research in Germany after the Second World War. th The occasion of his 100 birthday in the year 2007 was an excellent opportunity to acknowledge important ideas and accomplishments that Hermann Schlichting c- tributed to science. The editors of this volume are the present successors of Hermann Schlichting in his role as director of the two research institutes in Braunschweig. We were glad to host a scientific colloquium in his honor on 28 September 2007. Invited former scholars of Hermann Schlichting reviewed his work in boundary layer theory and in aircraft aerodynamics followed by presentations of important research results of his institutes today.

Autoren/Hrsg.

Schröder, Wolfgang

Radespiel, Rolf

Rossow, Cord-Christian

Inhaltsverzeichnis

1;Preface;6
2;Table of Contents;7
3;Biography of Professor Hermann Schlichting;9
4;Hermann Schlichting and the Boundary-Layer Theory;11
4.1;Boundary-Layer Theory;11
4.2;Schlichting’s Boundary-Layer Research;14
4.3;Tollmien Schlichting Waves;14
4.3.1;Points of Indifference (Transition Start);14
4.3.2;Points of Completed Transition;17
4.4;Equivalent Sand Roughness;20
4.5;Research Just after the War;22
4.5.1;Automobile Aerodynamics;22
4.5.2;Cascade Flows for Turbomachines;22
4.5.3;Book “Boundary-Layer Theory”;22
4.6;References;23
5;Hermann Schlichting’s Work and Wake in Airplane-Aerodynamics;26
5.1;An Approach;26
5.2;Scientific Acitivities in the 30ies and 40ies;27
5.3;Collapse and Reconstruction;34
5.4;Supervisor and Mentor in Aerodynamics;39
5.5;Schlichting Today;44
5.6;References;45
6;Numerical Simulation – Complementing Theory and Experiment as the Third Pillar in Aerodynamics;47
6.1;Introduction;47
6.2;Numerical Simulation in Science and Engineering;49
6.3;Basic Principles and Historical Development;51
6.3.1;Principle of Numerical Flow Simulation;52
6.3.2;Overview of Development of Computational Fluid Dynamics;53
6.4;Status of Numerical Flow Simulation at DLR;55
6.4.1;Civil Transport Aircraft at High-Lift Conditions;55
6.4.2;Unsteady Maneuver Simulation for Military Aircraft;58
6.4.3;Helicopter;59
6.5;Two Challenges;61
6.6;Perspectives;62
6.6.1;Center for Computer Applications in Aerospace Science and Engineering;63
6.7;References;64
7;Modern Wind Tunnel Techniques for Unsteady Testing – Development of Dynamic Test Rigs;67
7.1;Introduction;67
7.2;Criteria to Be Considered for Designing Dynamic Wind Tunnel Testing;68
7.3;Historical Development;69
7.4;Dynamic Testing Capabilities in Germany;71
7.5;Conclusion;83
7.6;References;84
8;Principle and Perspective of Optical Multipoint Methods for Aerodynamic Investigations;86
8.1;Introduction;86
8.2;Particle Image Velocimetry;87
8.2.1;Basic Principle;87
8.2.2;Evaluation;90
8.2.3;Application of PIV and Time-Resolved PIV;91
8.3;Extensions of the Particle Image Velocimetry;93
8.3.1;Stereoscopic Particle Image Velocimetry;93
8.3.2;Multi-plane Stereo Particle Image Velocimetry;94
8.3.3;Long-Range Microscopic Particle Image Velocimetry;94
8.3.4;Tomographic Particle Image Velocimetry;95
8.4;Background Oriented Schlieren Method;96
8.4.1;Basic Principle;96
8.4.2;Evaluation;97
8.4.3;Application;97
8.4.4;Tomographic Extension of BOS;98
8.5;Image Pattern Correlation Technique;99
8.5.1;Basic Principle of Translation Estimation;99
8.5.2;Basic Principle of 3D Deformation Estimation;100
8.6;Infrared Thermography;102
8.6.1;Basic Principle;102
8.6.2;Evaluation;102
8.6.3;Application;103
8.7;Pressure Sensitive Paint;105
8.7.1;Basic Principle;105
8.7.2;Evaluation;106
8.7.3;Application;107
8.8;Conclusion;108
8.9;References;109
9;The Second International Vortex Flow Experiment (VFE-2);113
9.1;Introduction;113
9.2;Test Configuration;114
9.3;Objectives for New Tests;115
9.4;Organization and Program of Work;116
9.5;Experimental Results for Partly Developed Vortical Flow (a < 18°);117
9.5.1;Vortex Formation on the Blunt Edged Configuration at a = 13°;117
9.5.2;Effects of Angle of Attack;120
9.5.3;Effects of Reynolds Number;122
9.5.4;Effects of Mach Number;123
9.5.5;Boundary Layers at a = 13°;123
9.6;Experimental Results for Fully Developed Vortical Flow without Vortex Breakdown (a = 18°);125
9.7;Experimental Results for Fully Developed Vortical Flow with Vortex Breakdown (a = 23°);128
9.8;Numerical Results for the VFE-2 Configuration;130
9.8.1;Numerical Results for Fully Developed Vortical Flows without Vortex Breakdown (a = 18°);131
9.8.2;Numerical Results for Fully Developed Vortical Flows with Vortex Breakdown (a = 23°);132
9.8.3;Numerical Results for the Partly Developed Vortical Flow Around the Configuration with Blunt Leading Edge (a = 13°);132
9.9;Outlook;134
9.10;References;135
10;Aerodynamic Wing Design for Transport Aircraft – Today;138
10.1;Introduction;138
10.2;Historical Mile Stones;138
10.3;Wing Technologies – An Aerodynamic Point of View;139
10.3.1;Swept Wing;141
10.3.2;Transsonic Wing Section;142
10.3.3;Laminar Wing;144
10.3.4;Forward Swept Wing;147
10.3.5;Elastic Wing;149
10.4;Perspectives;150
10.5;References;151
11;Passive and Active Methods to Enhance Axial-Flow Compressor Aerodynamics;153
11.1;Introduction;153
11.2;Passive Control of the Stator Hub Flow in a Highly Loaded Single-Stage Axial-Flow Low-Speed Compressor;154
11.2.1;Test Facility and Stage Design;154
11.2.2;Numerical Code, Computational Grid and Boundary Conditions;157
11.2.3;Results and Discussion;157
11.3;Active Control of the Tip Clearance Flow in Three Different Single-Stage Axial-Flow Low-Speed Compressors;162
11.3.1;Test Facility and Stage Design;162
11.3.2;Results and Discussion;163
11.4;Summary and Conclusion;171
11.5;References;173
12;Flow Analysis of Augmented High-Lift Systems;176
12.1;Introduction;176
12.2;Review of Circulation Control Technology;179
12.3;Numerical Flow Simulation Capability;183
12.3.1;Validation Experiment;183
12.3.2;Numerical Simulation Model;183
12.3.3;Comparison of Numerical and Experimental Results;184
12.4;Transport Wing Sections with High Blowing Gains;188
12.4.1;Geometry;189
12.4.2;Flow Analysis;190
12.4.3;Design Variants with Extended Lift Capability;194
12.5;Conclusion and Outlook;195
12.6;References;196
13;Dankesrede der Familie Schlichting zum Abschluss des wissenschaftlichen Kolloquiums am 28. Sept. 2007 aus Anlass des 100. Geburtstages von Prof. Dr. Hermann Schlichting in der Aula der TU Braunschweig;198
14;Vote of Thanks by the Family Schlichting, Terminating the Scientific Colloquium on September 28, 2007 at the Occasion of the 100th Anniversary of the Birthday of Prof. Dr. Hermann Schlichting;199
15;Author Index;200