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Autor: Nickolai M. Rubtsov
ISBN-13: 9783319565088
Einband: eBook
Seiten: 253
Sprache: Englisch
eBook Typ: PDF
eBook Format: eBook
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Ignition and Wave Processes in Combustion of Solids

Heat and Mass Transfer
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This book focuses on the application of classical combustion theory to ignition and flame propagation in solid-solid and gas-solid systems. It presents experimental investigations in the areas of local ignition, filtration combustion, self-propagating high temperature synthesis and nanopowders protection. The authors highlight analytical formulas used in different areas of combustion in solids and propose an approach based on classical combustion theory. The book attempts to analyze the basic approaches to understanding of solid-solid and solid - gas combustion presented in contemporary literature in a unified approach based on classical combustion theory.
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Preface………………………………………………………………………………………1
Acknowledgements…………………………………………………………………………7

Contents……………………………………………………………………………………..7

Introduction…………………………………………………………………………………9

References………………………………………………………………………………….23

Chapter I.  The theory of a local ignition…………………………………………………..28

   
1. On the theory of a local thermal explosion…………………………………………..28

  
2. Non-stationary ignition of a hot spot…………………………………………………34

  
3. Initiation of a hydrogen-air flame with a hot spot.Verification of the theory…..40    Conclusions to Chapter I…………………………………………………………………54

   References………………………………………………………………………………..55

Chapter II. The wave theory of ignition…………………………………………………...57

  
1. Ignition of the condensed substances with heat losses from the side surface………58

  
2. Ignition of a condensed substance with a constant heat flux released in two competing    

   exothermic reactions…………………………………………………………………….67

   
3. The features of ignition of the condensed systems interacting through a layer of a refractory    

    product with an energy flux ……………………………………………………………77

   
4. Regularities of ignition of the condensed systems with a heated surface according to the   

    parabolic law of chemical interaction…………………………………………………..85

  
5. Regularities of ignition of porous bodies under conditions of a counter non-stationary

   filtration of gas…………………………………………………………………………..96

  
6. Ignition of porous substances with the filterable gas. Cocurrent non-stationary

   filtration…………………………………………………………………………………113

Conclusions to Chapter II………………………………………………………………….128 References…………………………………………………………………………………130

Chapter III. The convective-conductive theory of combustion of condensed

substances………………………………………………………………………………….133


1. Convective combustion of “gasless” systems……………………………………..…..134


2. Convective heat and mass transfer in the processes of "gasless" combustion………...148


3. The features of combustion of the mixes Ti+0.5C and Ti+C of bulk density in a cocurrent flow of inert gas………………………………………………………………………………….161


4. Influence of humidity on the features of combustion of powder and granulated Ti+0.5C mixes………………………………………………………………………………………..171


5. Dependence of combustion velocity on the sample size in nonactivated and mechanically activated Ni +Al systems…………………………………………………………………...178


6. Combustion of cylindrical Ti + 0.5C compacts: influence of mechanical activation,

thermovacuum processing, and ambient pressure…………………………………………..184

References…………………………………………………………………………………..188

Conclusions to Chapter III…………………………………………………………………..193

Chapter 4. Theory of ignition of gas suspensions…………………………………………...194


1. Analytical method of calculation of critical conditions of a local ignition 

      of gas suspensions of solid particles……………………………………………………..196


2. Analysis of critical conditions of ignition of gas suspension with a heated body at pulse 

       energy supply……………………………………………………………………………205


3. Mathematical modeling of the process of ignition of gas suspension of solid particles in a mix oxidizer - combustible gas (a local ignition)……………………………………………221


4. Thermal ignition of hybrid gas suspensions in the presence of natural gas and chemically active additives…………………………………………………………….…………………233

References………………………………………………………………………………239

Conclusions to Chapter IV……………………………………………………………………242

Chapter V.  Ignition, combustion and passivation of nanopowders…………………………..243


1. Ignition of pyrophoric powders: An entry-level model……………………………………247


2. Temporal characteristics of ignition and combustion of iron nanoparticles in the air……254


3. Synthesis and characterization of passivated iron nanoparticles…………………………..263


4. Passivation of iron nanoparticles at subzero temperatures…………………………………268

Conclusions to Chapter V………………………………………………………………………276

References………………………………………………………………………………………277

Conclusions……………………………………………………………………………………..282

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Autor: Nickolai M. Rubtsov
ISBN-13 :: 9783319565088
ISBN: 3319565087
Verlag: Springer International Publishing
Seiten: 253
Sprache: Englisch
Auflage 1st ed. 2017
Sonstiges: Ebook