## Aerodynamics of a Lifting System in Extreme Ground EffectThis book is dedicated to the memory of a distinguished Russian engineer, Rostislav E. Alexeyev, who was the first in the world to develop the largest ground effect machine - Ekranoplan. One of Alexeyev's design concepts with the aerodynamic configuration of a jlying wing can be seen on the front page. The book presents a description of a mathematical model of flow past a lifting system, performing steady and unsteady motions in close proximity to the underlying solid surface (ground). This case is interesting for practical purposes because both the aerodynamic and the economic efficiency of the system near the ground are most pronounced. Use of the method of matched asymptotic expansions enables closed form solutions for the aerodynamic characteristics of the wings-in-ground effect. These can be used for design, identification, and processing of experimental data in the course of developing ground effect vehicles. The term extreme ground effect, widely used through out the book, is associated with very small relative ground clearances of the order of 10% or less. The theory of a lifting surface, moving in immediate proximity to the ground, represents one of the few limiting cases that can be treated analytically. The author would like to acknowledge that this work has been influenced by the ideas of Professor Sheila E. Widnall, who was the first to apply the matched asymptotics techniques to treat lifting flows with the ground effect. Saint Petersburg, Russia February 2000 Kirill V. Rozhdestvensky Contents 1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |

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### Contents

I | 1 |

II | 4 |

III | 7 |

IV | 17 |

V | 19 |

VI | 20 |

VII | 23 |

VIII | 25 |

XLIV | 224 |

XLV | 227 |

XLVI | 229 |

XLVII | 231 |

XLIX | 234 |

L | 237 |

LI | 239 |

LII | 241 |

IX | 28 |

X | 29 |

XI | 36 |

XII | 43 |

XIII | 45 |

XIV | 47 |

XVI | 51 |

XVII | 58 |

XVIII | 63 |

XIX | 73 |

XX | 79 |

XXI | 85 |

XXII | 95 |

XXIII | 101 |

XXIV | 112 |

XXVI | 114 |

XXVII | 121 |

XXIX | 124 |

XXX | 127 |

XXXI | 133 |

XXXII | 137 |

XXXIII | 146 |

XXXIV | 155 |

XXXV | 158 |

XXXVI | 166 |

XXXVII | 171 |

XXXVIII | 183 |

XXXIX | 200 |

XL | 205 |

XLI | 214 |

XLII | 221 |

XLIII | 223 |

### Other editions - View all

Aerodynamics of a Lifting System in Extreme Ground Effect Kirill V. Rozhdestvensky Limited preview - 2013 |

Aerodynamics of a Lifting System in Extreme Ground Effect Kirill V. Rozhdestvensky No preview available - 2010 |

Aerodynamics of a Lifting System in Extreme Ground Effect Kirill V. Rozhdestvensky No preview available - 2012 |

### Common terms and phrases

aerodynamic centers aerodynamic derivative amplitude angle of pitch asymptotic expansion auxiliary plane boundary conditions calculated channel flow clearance h Coanda effect compressible flow corresponding curvature deflection determined distribution downwash effective gap efficiency ekranoplans extreme ground effect finite flat plate flow past flow potential flow problem flow velocity foil formula function ground effect versus heave induced drag coefficient infinite aspect ratio integral equation jet flap leading edge lift coefficient lift-to-drag ratio lifting surface lifting system linear longitudinal lower surface matching motion nondimensional nonlinear obtain the following optimal parameters pitch angle planform pressure coefficient rectangular wing reentrant jet relative ground clearance respect root chord Rozhdestvensky small aspect ratio solution spanwise static stability Strouhal number suction force Taking into account tandem theory tips trailing edge two-dimensional unsteady upper flow velocity potential versus the Strouhal vortex wake wave wave-induced wing with endplates wing-in-ground-effect vehicles wing's zero

### Popular passages

Page 339 - An Analytic Solution for Two and Three-Dimensional Wings in Ground Effect," Journal of Fluid Mechanics, Vol.

Page 345 - Effect of Gaps on the Loading Distribution of Planar Lifting Surfaces,

Page 343 - Advanced method for computing flow around wings with rear separation and ground effect.

Page 347 - Symposium on Fluid Dynamics Problems of Vehicles Operating near or in the Air-Sea Interface, Amsterdam, the Netherlands, 26-1-26-10.

Page 339 - Unsteady motion of a wing of finite aspect ratio at vanishing distances from the ground', Trudy Leningradskogo Korablestroitelnogo Instituta, Vol 80, pp 69-76, Leningrad (1972).

Page 347 - The Influence of the Form of the Foil upon its Aerodynamic Characteristics Near the Ground,