Jean Délery is a Supaero (French National Higher School of Aeronautics and Space) engineer who has worked at Onera (French national aerospace research center) since 1964. He has participated in several major French and European aerospace programs, is the author of many scientific publications, and has occupied various teaching positions particularly at Supaero, the University of Versailles-Saint-Quentin, Ecole polytechnique in France and “La Sapienza” University in Rome, Italy. He is currently emeritus adviser at Onera.

• INTRODUCTION ixCHAPTER 1. SKIN FRICTION LINES PATTERN AND CRITICAL POINTS 11.1. Basic properties of the three-dimensional boundary layer 11.2. Skin friction lines and surface flow pattern 51.3. Critical points of the skin friction line pattern 81.3.1. General solution and the eigenvalue problem 81.3.2. The different critical points 141.4. Critical points of the wall vorticity lines 24CHAPTER 2. SEPARATION STREAMSURFACES AND VORTEX STRUCTURES 272.1. Generalization to the flow field and three-dimensional critical points 272.2. Separation and attachment lines 322.3. Streamsurfaces of separation and attachment 362.4. Vortical structures 402.5. Some properties of a vortical structure 42CHAPTER 3. SEPARATED FLOW ON A BODY 473.1. Basic rules and definitions 473.2. General definition: the basic separated structures 493.3. Field associated with a separation with one saddle point and three nodes: the horseshoe vortex 563.4. Field associated with a separation with one point and two foci: the tornado-like vortex 62CHAPTER 4. VORTEX WAKE OF WINGS AND SLENDER BODIES 694.1. Vortical structures over a delta wing 694.2. Vortical flow over a slender body 774.3. Vortex wake of a classical wing 824.3.1. Topological description 824.3.2. A scenario for the origin of vortices on a wing 88CHAPTER 5. SEPARATION INDUCED BY AN OBSTACLE OR A BLUNT BODY 915.1. Separation in front of an obstacle 915.2. Flow induced by an obstacle of finite height or protuberance 975.4. The flow past an automobile 1105.4.1. The surface flow pattern 1105.4.2. Separation surfaces 116CHAPTER 6. RECONSIDERATION OF THE TWO-DIMENSIONAL SEPARATION 1216.1. Some definitions: a reminder 1216.2. Two-dimensional separation 1236.3. Special critical points 1236.4. Three-dimensional structure of a two-dimensional separated flow 1316.5. Axisymmetric afterbody 136CHAPTER 7. CONCLUDING REMARKS 143BIBLIOGRAPHY 147LIST OF SYMBOLS 151INDEX 153