Compressible Flow Propulsion and Digital Approaches in Fluid Mechanics

This book aims to provide an efficient methodology of solving a fluid mechanics problem, based on an awareness of the physical. It meets different objectives of the student, the future engineer or scientist: Simple sizing calculations are required to master today's numerical approach for solving complex practical problems.

Table of Contents:
Preface ix Chapter 1 The Flow of Viscous Fluids Flow in the Vicinity of a Wall: Boundary Layers and Films 1 1.1 Introduction 1 1.2 Characteristics and classification of boundary layers 1 1.2.1 Boundary layers – various approaches 4 1.3 The outer boundary layers: an analytical approach 4 1.3.1 The laminar boundary layer developed by a flat plate in a uniform flow 4 1.3.2 The turbulent boundary layer 8 1.4 Examples of analytical approach: outer flows 13 1.5 Examples of analytical approach: inner flows 23 1.6 Outer boundary layers: integral methods 43 1.6.1 Principle of the integral method 43 1.6.2 Applications of integral methods 46 1.7 Channels and films 62 Chapter 2 One-dimensional Compressible Flows: Fully Reversible Flows 77 2.1 Introduction 77 2.2 One-dimensional adiabatic and reversible flows 78 2.2.1 Hypotheses adopted 78 2.2.2 Writing the laws 79 2.2.3 Other useful relations 79 2.2.4 Fundamental relations 85 2.2.5 Calculation of flow rate in a piping system 88 2.2.6 De Laval nozzle 92 2.3 Applications Reversible adiabatic flows 95 Chapter 3 One-dimensional Compressible Flows: Irreversible Flows 125 3.1 Introduction 125 3.2 Irreversible flow: straight shock wave 125 3.2.1 Establishing the fundamental relations 125 3.2.2 Applications 129 3.3 Partially irreversible flows: shock wave in a nozzle 144 3.3.1 Change of the generating state by the shock wave 144 3.3.2 Applications 146 3.4 Conclusion 156 Chapter 4 Modeling and Numerical Simulations 159 4.1 Introduction 159 4.2 Methodology description and simulation approach 160 4.3 Modeling and simulation of coupled systems 163 4.3.1 Mathematical formulation Behavior equations 163 4.3.2 Fluid–structure coupling conditions 164 4.4 Variational formulation 165 4.5 Finite element approximation 165 4.5.1 Approximation of physical unknowns 166 4.5.2 Integration of variational forms 166 4.6 The vibro-acoustic problem 166 4.7 The hydro-elastic problem 167 4.8 Applications 168 4.9 Conclusion 196 Chapter 5 Numerical Simulation of a Vertical-axis Wind Turbine 197 5.1 Introduction 197 5.2 Construction of the rotor geometry and definition of the computational domain 197 5.2.1 Mesh 199 5.2.2 Discretization scheme 202 5.2.3 System resolution and convergence 205 5.3 Analysis of the results 206 5.3.1 Validation of the CFD model 206 5.3.2 Influence of the characteristic parameters 210 5.4 Conclusion 216 Appendix 217 Bibliography 265 Index 269

About the Author :
Michel Ledoux is Professeur des universités. He was formerly Vice-President for Research at the University of Rouen in France, then Regional Delegate for the Ministry of Education in the region of High Normandy for Research and Technology. He is now retired from University, but is Counselor at the Conservatoire de Arts et Métiers in Normandy and still teaches physics to apprentice-engineers (Cnam and ITII). He was involved in reacting flows and spray systems research. Abdelkhalak El Hami is Professeur des universités at the Institut National des Sciences Appliquées (INSA-Rouen) in France and is in charge of the Normandy Conservatoire National des Arts et Metiers (CNAM) Chair of Mechanics, as well as several European pedagogical projects. He is an expert in fluid-structure interaction studies and reliability.