This volume contains the contributions to the scientific anniversary colloquium in honor of the 100th birthday of Hermann Schlichting, Braunschweig, September 2007. His outstanding achievements in boundary layer theory and aircraft aerodynamics are reviewed by invited scholars. Contributions of current leading research by the institutes formerly lead by Hermann Schlichting, the Institute of Fluid Mechanics of the Technische Universität Braunschweig and the Institute of Aerodynamics and Flow Technology of German Aerospace Center, in the fields of numerical flow simulation, experimental techniques, wing aerodynamics and turbomachinery highlight the lasting impact of his work until today.

Zusammenfassung
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.

Inhalt
Biography of Professor Hermann Schlichting.- Hermann Schlichting and the Boundary-Layer Theory.- Hermann Schlichting's Work and Wake in Airplane-Aerodynamics.- Numerical Simulation Complementing Theory and Experiment as the Third Pillar in Aerodynamics.- Modern Wind Tunnel Techniques for Unsteady Testing Development of Dynamic Test Rigs.- Principle and Perspective of Optical Multipoint Methods for Aerodynamic Investigations.- The Second International Vortex Flow Experiment (VFE-2).- Aerodynamic Wing Design for Transport Aircraft Today.- Passive and Active Methods to Enhance Axial-Flow Compressor Aerodynamics.- Flow Analysis of Augmented High-Lift Systems.- 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.- 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.