Fundamentals of Modern Unsteady Aerodynamics Bearbeitet von Ülgen Gülçat 1. Auflage 2010. Buch. xii, 341 S. Hardcover ISBN 978 3 642 14760 9 Format (B x L): 15,5 x 23,5 cm Gewicht: 1490 g Weitere Fachgebiete > Technik > Werkstoffkunde, Mechanische Technologie > Aerodynamik Zu Leseprobe schnell und portofrei erhältlich bei Die Online-Fachbuchhandlung beck-shop.de ist spezialisiert auf Fachbücher, insbesondere Recht, Steuern und Wirtschaft. Im Sortiment finden Sie alle Medien (Bücher, Zeitschriften, CDs, ebooks, etc.) aller Verlage. Ergänzt wird das Programm durch Services wie Neuerscheinungsdienst oder Zusammenstellungen von Büchern zu Sonderpreisen. Der Shop führt mehr als 8 Millionen Produkte.
1 Introduction... 1 1.1 Definitions...................................... 2 1.1.1 Aerodynamics............................. 2 1.1.2 Aerodynamic Coefficients..................... 2 1.1.3 Center of Pressure (x cp )... 2 1.1.4 Aerodynamic Center (x ac )... 3 1.1.5 Steady Aerodynamics........................ 3 1.1.6 Unsteady Aerodynamics...................... 3 1.1.7 Compressible Aerodynamics................... 3 1.1.8 Vortex Aerodynamics........................ 3 1.2 Generation of Lift................................ 4 1.3 Unsteady Lifting Force Coefficient..................... 5 1.4 Steady Aerodynamics of Thin Wings................... 7 1.5 Unsteady Aerodynamics of Slender Wings............... 8 1.6 Compressible Steady Aerodynamics.................... 8 1.7 Compressible Unsteady Aerodynamics.................. 12 1.8 Slender Body Aerodynamics......................... 12 1.9 Hypersonic Aerodynamics........................... 13 1.10 The Piston Theory................................ 15 1.11 Modern Topics................................... 16 1.12 Questions and Problems............................ 20 References.......................................... 21 2 Fundamental Equations... 23 2.1 Potential Flow................................... 23 2.1.1 Equation of Motion......................... 23 2.1.2 Boundary Conditions........................ 27 2.1.3 Linearization.............................. 28 2.1.4 Acceleration Potential........................ 33 2.1.5 Moving Coordinate System.................... 35 ix
x 2.2 Real Gas Flow................................... 36 2.2.1 System and Control Volume Approaches.......... 37 2.2.2 Global Continuity and the Continuity of the Species... 37 2.2.3 Momentum Equation........................ 39 2.2.4 Energy Equation............................ 41 2.2.5 Equation of Motion in General Coordinates......... 42 2.2.6 Navier Stokes Equations...................... 44 2.2.7 Thin Shear Layer Navier Stokes Equations......... 47 2.2.8 Parabolized Navier Stokes Equations............. 49 2.2.9 Boundary Layer Equations.................... 50 2.2.10 Incompressible Flow Navier Stokes Equations....... 51 2.2.11 Aerodynamic Forces and Moments............... 52 2.2.12 Turbulence Modeling........................ 54 2.2.13 Initial and Boundary Conditions................. 55 2.3 Questions and Problems............................ 56 References.......................................... 57 3 Incompressible Flow About an Airfoil.... 59 3.1 Impulsive Motion................................. 59 3.2 Steady Flow..................................... 62 3.3 Unsteady Flow................................... 67 3.4 Simple Harmonic Motion........................... 74 3.5 Loewy s Problem: Returning Wake Problem.............. 81 3.6 Arbitrary Motion................................. 82 3.7 Arbitrary Motion and Wagner Function................. 82 3.8 Gust Problem, Küssner Function...................... 87 3.9 Questions and Problems............................ 92 References.......................................... 94 4 Incompressible Flow About Thin Wings... 95 4.1 Physical Model.................................. 95 4.2 Steady Flow..................................... 99 4.2.1 Lifting Line Theory......................... 101 4.2.2 Weissinger s L-Method....................... 105 4.2.3 Low Aspect Ratio Wings..................... 107 4.3 Unsteady Flow................................... 111 4.3.1 Reissner s Approach......................... 113 4.3.2 Numerical Solution.......................... 116 4.4 Arbitrary Motion of a Thin Wing...................... 119 4.5 Effect of Sweep Angle............................. 120 4.6 Low Aspect Ratio Wing............................ 121 4.7 Questions and Problems............................ 123 References.......................................... 127
xi 5 Subsonic and Supersonic Flows... 129 5.1 Subsonic Flow................................... 131 5.2 Subsonic Flow about a Thin Wing..................... 135 5.3 Subsonic Flow Past an Airfoil........................ 137 5.4 Kernel Function Method for Subsonic Flows.............. 139 5.5 Doublet Lattice Method............................ 142 5.6 Arbitrary Motion of a Profile in Subsonic Flow............ 144 5.7 Supersonic Flow.................................. 146 5.8 Unsteady Supersonic Flow.......................... 147 5.9 Supersonic Flow About a Profile...................... 152 5.10 Supersonic Flow About Thin Wings.................... 154 5.11 Mach Box Method................................ 157 5.12 Supersonic Kernel Method.......................... 160 5.13 Arbitrary Motion of a Profile in Supersonic Flow.......... 161 5.14 Slender Body Theory.............................. 162 5.15 Munk s Airship Theory............................. 163 5.16 Questions and Problems............................ 165 References.......................................... 168 6 Transonic flow... 171 6.1 Two Dimensional Transonic Flow, Local Linearization....... 171 6.2 Unsteady Transonic Flow, Supersonic Approach........... 176 6.3 Steady Transonic Flow, Non Linear Approach............. 177 6.4 Unsteady Transonic Flow: General Approach............. 180 6.5 Transonic Flow around a Finite Wing................... 184 6.6 Unsteady Transonic Flow Past Finite Wings.............. 187 6.7 Wing Fuselage Interactions at Transonic Regimes.......... 189 6.8 Problems and Questions............................ 190 References.......................................... 191 7 Hypersonic Flow... 193 7.1 Newton s Impact Theory............................ 194 7.2 Improved Newton s Theory.......................... 195 7.3 Unsteady Newtonian Flow........................... 198 7.4 The Piston Analogy............................... 200 7.5 Improved Piston Theory: M 2 s 2 = O(1)... 203 7.6 Inviscid Hypersonic Flow: Numerical Solutions............ 205 7.7 Viscous Hypersonic Flow and Aerodynamic Heating........ 213 7.8 High Temperature Effects in Hypersonic Flow............. 220 7.9 Hypersonic Viscous Flow: Numerical Solutions............ 231 7.10 Hypersonic Plane: Waverider......................... 236 7.11 Problems and Questions............................ 239 References.......................................... 242
xii 8 Modern Subjects... 245 8.1 Static Stall...................................... 247 8.2 Dynamic Stall................................... 251 8.3 The Vortex Lift (Polhamus Theory).................... 258 8.4 Wing Rock..................................... 264 8.5 Flapping Wing Theory............................. 274 8.6 Flexible Airfoil Flapping............................ 289 8.7 Finite Wing Flapping.............................. 297 8.8 Problems and Questions............................ 299 References.......................................... 304 9 Aerodynamics: The Outlook for the Future... 307 References.......................................... 311 Appendices... 313 Index... 337