Ebook: Major Research Topics in Combustion

The Institute for Computer Applications in Science and Engineer­ ing (ICASE) and NASA Langley Research Center (LaRC) brought together on October 2-4, 1989 experts in the various areas of com­ bustion with a view to expose them to some combustion problems of technological interest to LaRC and possibly foster interaction with the academic community in these research areas. The top­ ics chosen for this purpose were flame structure, flame stability, flame holding/extinction, chemical kinetics, turbulence-kinetics in­ teraction, transition to detonation, and reacting free shear layers. The lead paper set the stage by discussing the status and issues of supersonic combustion relevant to scramjet engine. Then the ex­ perts were called upon i) to review the current status of knowledge in the aforementioned ;:I. reas, ii) to focus on how this knowledge can be extended and applied to high-speed combustion, and iii) to suggest future directions of research in these areas. Each topic was then dealt with in a position paper followed by formal discussion papers and a general discussion involving the participants. The position papers discussed the state-of-the-art with an emphasis on key issues that needed to be resolved in the near future. The discussion papers crit­ ically examined these issues and filled in any lacunae therein. The edited versions of the general discussions in the form of questions from the audience and answers from the speakers are included wher­ ever possible to give the reader the flavor of the lively interactions that took place.

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Content:
Front Matter....Pages i-xv
Supersonic Combustion Status and Issues....Pages 1-15
Discussion on Supersonic Combustion....Pages 16-20
Front Matter....Pages 21-21
Numerical Modeling of Two-Dimensional Axisymmetric Laminar Diffusion Flames....Pages 23-44
Relevance of Nonpremixed Laminar Flames to Turbulent Combustion....Pages 45-69
Laminar-Flame Structure....Pages 70-97
Discussion on Flame Structure....Pages 98-99
Front Matter....Pages 101-101
Flame Stability....Pages 103-130
Stability of Laminar Diffusion Flames in Compressible Mixing Layers....Pages 131-161
Role of Acoustics in Combustion Instability....Pages 162-178
Hydrodynamic Instabilities in Flames....Pages 179-196
Discussion on Flame Stability....Pages 197-198
Front Matter....Pages 199-199
Mechanisms of Flame Stabilization in Subsonic And Supersonic Flows....Pages 201-236
Fuel Injection and Flameholding in High Speed Combustion Systems....Pages 237-252
Flame Holding In Unconfined Turbulent Premixed Flames....Pages 253-270
Discussion on Flame Holding/Extinction....Pages 271-273
Front Matter....Pages 275-275
Position Paper on Chemical Kinetics of Combustion Processes....Pages 277-308
Pressure Effects on the Kinetics of High Speed Chemically Reacting Flows....Pages 309-338
Chemical Kinetic Research Related To Combustion in High-Speed Flows....Pages 339-356
Front Matter....Pages 357-357
The Interaction of Turbulence and Chemical Kinetics....Pages 359-402
Turbulence-Kinetics Interaction in Recirculatory Flows....Pages 403-422
Front Matter....Pages 357-357
Comments on the Interaction of Turbulence And Chemical Kinetics....Pages 423-436
Front Matter....Pages 437-437
On The Transition from Deflagration to Detonation....Pages 439-487
Discussion On The Transition From Deflagration To Detonation (Ddt)....Pages 488-490
Transition to Detonation - Role of Explosion within an Explosion....Pages 491-524
Discussion on Transition to Detonation....Pages 525-528
Front Matter....Pages 529-529
Mixing Power Concepts in Scramjet Combustor Design....Pages 531-584
Discussion on Mixing Power Concepts in Scramjet Combustor Design....Pages 585-587
Some Current Issues In The Analysis Of Reacting Shear Layers: Computational Challenges....Pages 588-647
Discussion on Reacting Shear Layers....Pages 648-650

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Content:
Front Matter....Pages i-xv
Supersonic Combustion Status and Issues....Pages 1-15
Discussion on Supersonic Combustion....Pages 16-20
Front Matter....Pages 21-21
Numerical Modeling of Two-Dimensional Axisymmetric Laminar Diffusion Flames....Pages 23-44
Relevance of Nonpremixed Laminar Flames to Turbulent Combustion....Pages 45-69
Laminar-Flame Structure....Pages 70-97
Discussion on Flame Structure....Pages 98-99
Front Matter....Pages 101-101
Flame Stability....Pages 103-130
Stability of Laminar Diffusion Flames in Compressible Mixing Layers....Pages 131-161
Role of Acoustics in Combustion Instability....Pages 162-178
Hydrodynamic Instabilities in Flames....Pages 179-196
Discussion on Flame Stability....Pages 197-198
Front Matter....Pages 199-199
Mechanisms of Flame Stabilization in Subsonic And Supersonic Flows....Pages 201-236
Fuel Injection and Flameholding in High Speed Combustion Systems....Pages 237-252
Flame Holding In Unconfined Turbulent Premixed Flames....Pages 253-270
Discussion on Flame Holding/Extinction....Pages 271-273
Front Matter....Pages 275-275
Position Paper on Chemical Kinetics of Combustion Processes....Pages 277-308
Pressure Effects on the Kinetics of High Speed Chemically Reacting Flows....Pages 309-338
Chemical Kinetic Research Related To Combustion in High-Speed Flows....Pages 339-356
Front Matter....Pages 357-357
The Interaction of Turbulence and Chemical Kinetics....Pages 359-402
Turbulence-Kinetics Interaction in Recirculatory Flows....Pages 403-422
Front Matter....Pages 357-357
Comments on the Interaction of Turbulence And Chemical Kinetics....Pages 423-436
Front Matter....Pages 437-437
On The Transition from Deflagration to Detonation....Pages 439-487
Discussion On The Transition From Deflagration To Detonation (Ddt)....Pages 488-490
Transition to Detonation - Role of Explosion within an Explosion....Pages 491-524
Discussion on Transition to Detonation....Pages 525-528
Front Matter....Pages 529-529
Mixing Power Concepts in Scramjet Combustor Design....Pages 531-584
Discussion on Mixing Power Concepts in Scramjet Combustor Design....Pages 585-587
Some Current Issues In The Analysis Of Reacting Shear Layers: Computational Challenges....Pages 588-647
Discussion on Reacting Shear Layers....Pages 648-650
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