Aircraft Propulsion

Explore the latest edition of a leading resource on sustainable aviation, alternative jet fuels, and new propulsion systemsThe newly revised Third Edition of Aircraft Propulsion delivers a comprehensive update to the successful Second Edition with a renewed focus on the integration of sustainable aviation concepts. The book tackles the impact of aviation on the environment at the engine component level, as well as the role of propulsion system integration on fuel burn. It also discusses combustion emissions, including greenhouse gases, carbon monoxide, unburned hydrocarbons (UHC), and oxides of nitrogen (NOx).Alternative jet fuels, like second generation biofuels and hydrogen, are presented. The distinguished author covers aviation noise from airframe to engine and its impact on community noise in landing and takeoff cycles. The book includes promising new technologies for propulsion and power, like the ultra-high bypass (UHB) turbofan and hybrid-electric and electric propulsion systems.Readers will also benefit from the inclusion of discussions of unsteady propulsion systems in wave-rotor combustion and pulse-detonation engines, as well as: A thorough introduction to the history of the airbreathing jet engine, including innovations in aircraft gas turbine engines, new engine concepts, and new vehicles An exploration of compressible flow with friction and heat, including a brief review of thermodynamics, isentropic process and flow, conservation principles, and Mach numbers A review of engine thrust and performance parameters, including installed thrust, rocket thrust, and modern engine architecture A discussion of gas turbine engine cycle analysis Perfect for aerospace and mechanical engineering students in the United States and overseas, Aircraft Propulsion will also earn a place in the libraries of practicing engineers in the aerospace and green engineering sectors seeking the latest up to date resource on sustainable aviation technologies.

Auteur

Saeed Farokhi, PhD, is Professor Emeritus of Aerospace Engineering at the University of Kansas, USA. His main areas of research focus are propulsion systems, flow control, renewable energy, and computational fluid dynamics. He is Fellow of the Royal Aeronautical Society and the American Society of Mechanical Engineers. He is Associate Fellow of the American Institute of Aeronautics and Astronautics.

Texte du rabat

AIRCRAFT PROPULSION

Résumé
AIRCRAFT PROPULSION

Contenu

Preface to the Third Edition xvii

Preface to the Second Edition xix

Preface to the First Edition xxi

About the Companion Website xxv

1 Introduction: Propulsion in Sustainable Aviation 1

1.1 History of the Airbreathing Jet Engine, a Twentieth-Century Invention-The Beginning 1

1.2 Innovations in Aircraft Gas Turbine Engines 4

1.2.1 Multispool Configuration 4

1.2.2 Variable Stator 5

1.2.3 Transonic Compressor 5

1.2.4 Low-Emission Combustor 6

1.2.5 Turbine Cooling 7

1.2.6 Exhaust Nozzles 8

1.2.7 Modern Materials and Manufacturing Techniques 8

1.3 Twenty-first Century Aviation Goal: Sustainability 10

1.3.1 Combustion Emissions 10

1.3.2 Greenhouse Gases 11

1.3.3 Fuels for Sustainable Aviation 14

1.4 New Engine Concepts in Sustainable Aviation 15

1.4.1 Advanced GT Concepts: ATP/CROR and GTF 15

1.4.2 Adaptive Cycle Engine 16

1.4.3 Advanced Airbreathing Rocket Technology 18

1.4.4 Wave Rotor Topping Cycle 18

1.4.4.1 Humphrey Cycle versus Brayton Cycle 18

1.4.5 Pulse Detonation Engine (PDE) 20

1.4.6 Millimeter-Scale Gas Turbine Engines: Triumph of MEMS and Digital Fabrication 20

1.4.7 Combined Cycle Propulsion: Engines from Takeoff to Space 21

1.4.8 Hybrid-Electric and Distributed Electric Propulsion 22

1.5 New Vehicle Technologies 30

1.6 Summary 34

1.7 Roadmap for the Third Edition 34

References 36

Problems 38

2 Compressible Flow with Friction and Heat: A Review 41

2.1 Introduction 41

2.2 A Brief Review of Thermodynamics 42

2.3 Isentropic Process and Isentropic Flow 46

2.4 Conservation Principles for Systems and Control Volumes 47

2.5 Speed of Sound and Mach Number 54

2.6 Stagnation State 56

2.7 Quasi-One-Dimensional Flow 58

2.8 Area-Mach Number Relationship 62

2.9 Sonic Throat 63

2.10 Waves in Supersonic Flow 66

2.11 Normal Shocks 67

2.12 Oblique Shocks 71

2.13 Conical Shocks 74

2.14 Expansion Waves 79

2.15 Frictionless, Constant-Area Duct Flow with Heat Transfer: Rayleigh Flow 83

2.16 Adiabatic Flow of a Calorically Perfect Gas in a Constant-Area Duct with Friction: Fanno Flow 92

2.17 Friction (drag) coefficient Cf and D'Arcy Friction Factor fD 105

2.18 Dimensionless Parameters 105

2.19 Fluid Impulse 108

2.20 Summary of Fluid Impulse 115

References 116

Problems 116

3 Engine Thrust and Performance Parameters 127

3.1 Introduction 127

3.1.1 Takeoff Thrust 133

3.2 Installed Thrust-Some Bookkeeping Issues on Thrust and Drag 133

3.3 Engine Thrust Based on the Sum of Component Impulse 138

3.4 Rocket Thrust 141

3.5 Airbreathing Engine Performance Parameters 142

3.5.1 Specific Thrust 142

3.5.2 Specific Fuel Consumption and Specific Impulse 143

3.5.3 Thermal Efficiency 144

3.5.4 Propulsive Efficiency 147

3.5.5 Engine Overall Efficiency and Its Impact on Aircraft Range and Endurance 150

3.6 Modern Engines, Their Architecture, and Some Performance Characteristics 153

3.7 Summary 156

References 157

Problems 158

4 Gas Turbine Engine Cycle Analysis 167

4.1 Introduction 167

4.2 The Gas Generator 167

4.3 Aircraft Gas Turbine Engines 169

4.3.1 The Turbojet Engine 169

4.3.1.1 The Inlet 169

4.3.1.2 The Compressor 173

4.3.1.3 The Burner 179

4.3.1.4 The Turbine 184

4.3.1.5 The Nozzle 193

4.3.1.6 Thermal Efficiency of a Turbojet Engine 200

4.3.1.7 Propulsive Efficiency of a Turbojet Engine 208

4.3.1.8 The Overall Efficiency of a Turbojet Engine 209

4.3.1.9 Performance Evaluation of a Turbojet Engine 210

4.3.2 The Turbojet Engine with an Afterburner 211

4.3.2.1 Introduction 211

4.3.2.2 Analysis 213

4.3.2.3 Optimum Compressor Pressure Ratio for Maximum (Ideal) Thrust Turbojet Engine with Afterburner 216

4.3.3 The Turbofan Engine 222

4.3.3.1 Introduction 222

4.3.3.2 Analysis of a Separate-Exhaust Turbofan Engine 223

4.3.3.3 Thermal Efficiency of a Turbofan Engine 227

4.3.3.4 Propulsive Efficiency of a Turbofan Engine 228

4.3.4 Ultra-High Bypass (UHB) Turbofan Engines 233

4.4 Analysis of a Mixed-Exhaust Turbofan Engine with an Afterburner 237

4.4.1 Mixer 238

4.4.2 Cycle Analysis 240

4.4.2.1 Solution Procedure 241

4.5 The Turboprop Engine 251

4.5.1 Introduction 251

4.5.2 Propeller Theory 252

4.5.2.1 Momentum Theory 253

4.5.2.2 Blade Element Theory 257

4.5.3 Turboprop Cycle Analysis 259

4.5.3.1 The New Parameters 259

4.5.3.2 Design Point Analysis 259

4.5.3.3 Optimum Power Split Between the Propeller and the Jet 263

4.6 Promising Propulsion and Power Technologies in Sustainable Aviation 269

4.6.1 Distributed Combustion Concepts in Advanced Gas Turbine Engine Core 269

4.6.2 Multi-Fuel (Cryogenic-Kerosene) Hybrid Propulsion Concept 272

4.6.3 Intercooled and Recuperated Turbofan Engines 274

4.6.4 Active Core Concepts 275

4.6.5 Wave-Rotor Combustion 277

4.6.6 Pulse Detonation Engine (PDE) 283

4.6.6.1 Idealized Laboratory PDE: Thrust Tube 285

4.6.6.2 Pulse Detonation Ramjet 286

4.6.6.3 Turbofan Engine with PDE 287

4.6.6.4 Pulse Detonation Rocket Engine (PDRE) 288

4.6.6.5 Vehicle-Level Performance Evaluation of PDE 288

4.6.7 Adaptive Cycle Engines (ACE) 290

4.7 Summary 294

References 295

Problems 297

5 General Aviation and Uninhabited Aerial Vehicle Propulsion System 319

5.1 Introduction 319

5.2 Cycle Analysis 320

5.2.1 O…