Subsonic Aerodynamics

ISBN9782553011306 EditeurPresses internationales Polytechnique pages534 Parution2003-11-14
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The field of aeronautics constantly impresses us with its high-flying technology. To this end, the artisans in the field, most notably engineers, must be familiar with the basics of aerodynamics which are vital to the success of these vast enterprises. This book presents the theory from its most basic principles to the notion of experimental aerodynamics while emphasizing the in-depth study of aerodynamic profiles in subsonic regime and the finite-wing span in two and three dimensions. In addition, to the benefit of all concerned, this work is a complement to the theoretical part as it offers a multitude of practical applications related to the physical phenomena characteristic to aerodynamics.
Subsonic Aerodynamics is both theoretical and practical. It is intended for students and engineers specializing in the field of aeronautics and aerodynamic phenomena. This book contains a wealth of practical examples and should be of particular interest to those students and mechanical engineers hungry for knowledge regarding new advancements in this area of application


This book presents the foundations of theory and practice related to aerodynamic phenomena and is intended for students and engineers specializing in the field of aeronautics. It is also of interest to students and engineers in mechanical engineering desiring to advance in this field.

The aerospace industry recognizes that a significant advancement and fondamental understanding of aerodynamics are necessary for the formation of engineers in this field. This work complements the theoretical part and a multitude of applications related to the physical phenomena.

After having presented the basic principles of aerodynamics and the general equations of fluid motion, the author describes the irrotational flows and axisymmetric flows of an ideal fluid. The detailed study of aerodynamic profiles/airfoils in subsonic regime and the finite-wing span in two and three dimensions constitutes the core of the work. Finally, the author dedicates the last chapters to the theory of propulsive propellers, the aerodynamics of the helicopter and experimental aerodynamics. Every chapter includes exercises with answers in Appendix. The book consists of several appendices to complement mathematical developments and to present the aerodynamic characteristics of certain airfoils.
Ion Paraschivoiu is a professor in the Department of Mechanical Engineering and also holds the J-A. Bombardier Aeronautical Chair at École Polytechnique de Montréal. He specializes in aerodynamics of wind turbines and his research interests include aircraft icing as well as optimization and drag prediction.
Chapter 1 - General principles and basics
Introduction. Aerodynomics: definition and objectives. Theoretical and experimental methods in aerodynomics. Basic concepts. General equations for the movement of a fluid. Parficular flows. Dimensionless numbers and similarity. Fundamental variables in aerodynamics. Aerodynamic forces and moments

Chapter 2 - Irrotational flows of the ideal fluid
Definition of irrotational flow. Plane irrotational flow. Helmholtz's equation. Laplace equation. Circulation. Simple irrotational flows in two dimensions. Method of superposition of several flows. Blasius laws. Circle theorem. Example applications. Method of images. Exercises

Chapter 3 - Axis-symmetric flows
Irrotational flow in three dimensions. Flow around simple bodies of revolution. Potential flow around bodies. Considerations for bodies having simple geometry. Exercises

Chapter 4 - Airfoils in subsonic flow
Geometric features of airfoils. Coefficient of pressure. Complex variables and conformal transformations for the study of airfoils. Mechanism of lift (Kutta-Joukowski theorem). Thin airfoil theory. Numerical methods for the calculation of flow around airfoils. Panel methods for the calculation of flow around airfoils. Exercises

Chapter 5 - Finite-span wing
Geometric features. Aerodynamic features. Laws of vortex motion. Schematic of flow around a wing of finite span. Theory of finite-span wing based on the method of distribution of vortices. Exercises

Chapter 6 - Panel method in three dimensions applied to finite-span wings
Panel method using a line-distribution of doublets. Internal singularity method. Surface singularity method for a wing. Calculation of potential on Sp. Distribution of panels on the wing. Velocity induced by a distribution of sources. Velocity induced by a horseshoe-shaped vote and a uniform line of sources

Chapter 7 - Propeller Theory
Geometry of the helix and the blade element. Aerodynamic working of the propulsive propellers. Theory of Froude.
Blade element theory. Vortex theory of propellers. Corrections for camber and thickness of the blade. Exercices

Chapter 8 - Aerodynamics of the helicopter
Principle of helicopter flight. Aerodynamics of the rotor. Exercises

Chapter 9 - Notions of experimental aerodynamics
Aim of experiments and the principle of reciprocity. Means of tests. Convergent nozzles of subsonic wind tunnels. Force measurement and the aerodynamic balances. Pressure measurement. Velocity measurement. Observation of flows by visualization. Exercices

Appendix A: Algebra and vector analysis
Appendix B: Equations of motion in different reference frames
Appendix C: Complex numbers
Appendix D: Aerodynamic profiles
Appendix E: Equivalence between doublet and vortex
Appendix F: Physical dimensions and units of measurement
Appendix G: Butterfly wings and wind turbines

Answers to the exercises
Supplementary exercises