The Detonation Phenomenon

The Detonation Phenomenon

5.0 1
by John H. S. Lee
     
 

ISBN-10: 0521897238

ISBN-13: 9780521897235

Pub. Date: 06/30/2008

Publisher: Cambridge University Press

This book introduces the detonation phenomenon in explosives. It is ideal for engineers and graduate students with a background in thermodynamics and fluid mechanics. The material is mostly qualitative, aiming to illustrate the physical aspects of the phenomenon. Classical idealized theories of detonation waves are presented first. These permit detonation speed, gas

Overview

This book introduces the detonation phenomenon in explosives. It is ideal for engineers and graduate students with a background in thermodynamics and fluid mechanics. The material is mostly qualitative, aiming to illustrate the physical aspects of the phenomenon. Classical idealized theories of detonation waves are presented first. These permit detonation speed, gas properties ahead and behind the detonation wave, and the distribution of fluid properties within the detonation wave itself to be determined. Subsequent chapters describe in detail the real unstable structure of a detonation wave. One-, two-, and three-dimensional computer simulations are presented along with experimental results using various experimental techniques. The important effects of confinement and boundary conditions and their influence on the propagation of a detonation are also discussed. The final chapters cover the various ways detonation waves can be formed and provide a review of the outstanding problems and future directions in detonation research.

Product Details

ISBN-13:
9780521897235
Publisher:
Cambridge University Press
Publication date:
06/30/2008
Pages:
400
Product dimensions:
7.20(w) x 10.10(h) x 1.10(d)

Table of Contents

Preface xi

1 Introduction 1

1.1 Deflagrations and Detonations 1

1.2 Discovery of the Detonation Phenomenon 4

1.3 Chapman-Jouguet Theory 5

1.4 The Detonation Structure 7

1.5 Dynamics of the Detonation Products 10

1.6 Stability of the Detonation Front 11

1.7 Influence of Boundary Conditions 12

1.8 Deflagration-to-Detonation Transition (DDT) 15

1.9 Direct Initiation 17

1.10 Outstanding Problems 19

Bibliography 22

2 Gasdynamic Theory of Detonations and Deflagrations 26

2.1 Introduction 26

2.2 Basic Equations 27

2.3 Rayleigh Line and Hugoniot Curve 29

2.4 The Tangency (Chapman-Jouguet) Solutions 32

2.5 Entropy Variation along the Hugoniot Curve 35

2.6 Downstream Flow Conditions 36

2.7 The Chapman-Jouguet Criterion 38

2.8 Rankine-Hugoniot Relations 42

2.9 Deflagrations 46

2.10 Closing Remarks 50

Bibliography 52

3 Dynamics of Detonation Products 53

3.1 Introduction 53

3.2 Basic Equations 54

3.3 Diverging Cylindrical and Spherical CJ Detonations 57

3.4 Piston Motion behind Diverging Detonations 59

3.5 Diverging Detonations in a Nonuniform Medium 65

3.6 Closing Remarks 71

Bibliography 72

4 Laminar Structure of Detonations 73

4.1 Introduction 73

4.2 The ZND Structure for an Ideal Gas 75

4.3 Pathological Detonations 83

4.4 Nonideal Detonations 89

4.5 Closing Remarks 95

Bibliography 97

5 Unstable Detonations: Numerical Description 98

5.1 Introduction 98

5.2 Linear Stability Analysis 99

5.3 Normal-Mode Linear Analysis 99

5.4 Asymptotic Modeling of Unstable Detonation 101

5.5 High Activation Energy and the Newtonian Limit 102

5.6 Asymptotic Analysis of Multidimensional Instabilities and Cell SpacingPrediction 103

5.7 Asymptotic Limit of Large Overdrive 105

5.8 Asymptotic Limit of Weak Heat Release 105

5.9 Direct Numerical Simulation of Unstable Detonation 106

5.10 One-Dimensional Instability (One-Step Reaction Rate Model) 108

5.11 Effect of Chemistry on Stability 118

5.12 Two-Dimensional Cellular Instability 128

5.13 Closing Remarks 139

Bibliography 141

6 Unstable Detonations: Experimental Observations 147

6.1 Introduction 147

6.2 The Spinning Detonation Phenomenon 148

6.3 The Manson-Taylor-Fay-Chu Acoustic Theory of Spinning Detonation 152

6.4 Structure of the Spinning Detonation Front 157

6.5 Multiheaded Detonations 170

6.6 Cellular Structure in Other Geometries 178

6.7 Cell Size and Chemistry 194

6.8 Closing Remarks 199

Bibliography 201

7 Influence of Boundary Conditions 204

7.1 Introduction 204

7.2 Velocity Deficit 205

7.3 Detonations in Rough-Walled Tubes 214

7.4 Acoustically Absorbing Walls 227

7.5 Detonation Limits 235

7.6 Closing Remarks 245

Bibliography 247

8 Deflagration-to-Detonation Transition 250

8.1 Introduction 250

8.2 Gasdynamics of Deflagration Waves 252

8.3 Salient Features of the Transition Phenomenon 258

8.4 Flame Acceleration Mechanisms 262

8.5 Onset of Detonation 277

8.6 Criterion for Transition from Deflagration to Detonation 286

8.7 Closing Remarks 293

Bibliography 295

9 Direct Initiation of Detonations 297

9.1 Introduction 297

9.2 Blast Initiation (Experimental Observations) 299

9.3 Numerical Simulation of Blast Initiation 314

9.4 The Critical Tube Diameter 327

9.5 Other Means of Direct Initiation 339

9.6 Theory of Blast Initiation 349

9.7 The SWACER Mechanism 360

9.8 Closing Remarks 368

Bibliography 370

Epilogue 373

Index 377

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The Detonation Phenomenon 5 out of 5 based on 0 ratings. 1 reviews.
Medvegas More than 1 year ago
This book, erudite yet easily accessible, is not just for mechanical engineers, physicists, or nuclear blast technicians, but anyone who might be interested in how detonations form, what exactly happens in the seconds or milliseconds as an explosion occurs, and the intense velocity at which a detonation can propagate. Having no background in physics, chemistry, or mechanics, and possessing a BA in Psychology from UNLV, I can understand the concepts quite well, and it is highly interesting in how an explosion can form and propagate omnidirectionally throughout its blast radius. Mathematical equations are kept to a minimum, only being used insofar as comprehending the concepts essential to grasping the material, focuses on prose rather than on the dynamics of physics, and conveys quite effectively the didactic need for the scientific measurement and study of detonations, in all of its manifestations. Although not a coffee table book, one that might be brought to a delicatessen, or that should be shared with a first-time date, it is of utmost importance for anyone interested in such material to understand the underlying mechanisms of detonations so that we may be more informed when the inevitability of a nuclear exchange happens, or more commonly, when an explosion occurs where everyone else is wondering what had happened, after reading this book, we may be the only one's that do know. Cautionary Note: This is a very difficult book to read for the uninitiated, I don't fully understand it all, but it does make one feel very intelligent to read.