Turbulent Reactive Flows

ISBN-13: 9780387968872 / Angielski / Miękka / 1989 / 950 str.

R. Borghi; S. N. B. Murthy

Opis

Turbulent reactive flows are of common occurrance in combustion engineering, chemical reactor technology and various types of engines producing power and thrust utilizing chemical and nuclear fuels. Pollutant formation and dispersion in the atmospheric environment and in rivers, lakes and ocean also involve interactions between turbulence, chemical reactivity and heat and mass transfer processes. Considerable advances have occurred over the past twenty years in the understanding, analysis, measurement, prediction and control of turbulent reactive flows. Two main contributors to such advances are improvements in instrumentation and spectacular growth in computation: hardware, sciences and skills and data processing software, each leading to developments in others. Turbulence presents several features that are situation-specific. Both for that reason and a number of others, it is yet difficult to visualize a so-called solution of the turbulence problem or even a generalized approach to the problem. It appears that recognition of patterns and structures in turbulent flow and their study based on considerations of stability, interactions, chaos and fractal character may be opening up an avenue of research that may be leading to a generalized approach to classification and analysis and, possibly, prediction of specific processes in the flowfield. Predictions for engineering use, on the other hand, can be foreseen for sometime to come to depend upon modeling of selected features of turbulence at various levels of sophistication dictated by perceived need and available capability.

Spis treści

Structure: Diagnostics and Analysis.- Measurement of the Topology of Large-Scale Structures in Turbulent Reacting Flows.- Finite Chemical Kinetics Effects in a Subsonic Turbulent Hydrogen Flame.- Cars Study of Premixed Turbulent Combustion in a High Velocity Flow.- The Structure of Jet Diffusion Flames.- Instantaneous Radial Profiles of OH Fluorescence and Rayleigh Scattering Through a Turbulent H2- Air Diffusion Flame.- Flame Structure in Spark Ignited Engines, from Initiation to Free Propagation.- Comparison Between Two Highly Turbulent Flames Having Very Different Laminar Burning Velocities.- Structure of Turbulent Premixed Flames as Revealed by Spectral Analysis.- Turbulent Flow Field and Front Position Statistics in V-Shaped Premixed Flame With and Without Confinement.- Two-Component Velocity Probability Density Measurements During Premixed Combustion in a Spark Ignition Engine.- On the Accuracy of Laser Methods for Measuring Temperature and Species Concentration in Reacting Flows.- Structure of Flamelets in Turbulent Reacting Flows and Influences of Combustion on Turbulence Fields.- Flamelet Library for Turbulent Wrinkled Flames.- Diffusion Flame Attachment and Flame Spread Along Mixing Layers.- Length and Time Scales in Turbulent Combustion.- A Model for Reactions in Turbulent Jets: Effects of Reynolds, Schmidt, and Damköhler Numbers.- A Fractal Description of Flamelets.- Some Results on the Structure of the Tempertature Field in Low Damkohler Number Reaction Zones.- Interaction of a Flame Front with Vortices : An Experiment.- Experimental Studies in Vortex Pair Motion Coincident with a Liquid Reaction.- On an Attempt to Measure the Decay of Concentration Fluctuations in a Quasi-Isotropic Grid by Use of the Fluorescence of the Solution.- Turbulent Reactive Flows of Liquids in Isothermal Stirred Tanks.- Structure and Predictive Schemes.- Turbulent Shear Layer Mixing With Fast Chemical Reactions.- The Use of Direct Numerical Simulation in the Study of Turbulent, Chemically-Reacting Flows.- Direct Numerical Simulation and Simple Closure Theory for a Chemical Reaction in Homogeneous Turbulence.- The Interaction Between Turbulence and Chemistry in Premixed Turbulent Flames.- On the Problem of Modelling Time or Length Scales in Turbulent Combustion.- Statistical Modelling of Turbulent Reactive Flows.- Coherent Flame Description of Turbulent Premixed Ducted Flames.- Turbulence-Combustion Interactions in a Reacting Shear Layer.- A PDF Method for Turbulent Recirculating Flows.- Dyanmics of Cold and Reacting Flows on Backward Facing Step Geometry.- PDF — Transport Equations for Chemically Reacting Flows.- Modelling the Effects of Combustion on a Premixed Turbulent Flow : A Review.- The Numerical Simulation of Compressible and Reactive Turbulent Structures.- Turbulent Multiphase Flows.- Lagrangian Simulation of Particle Dispersion.- Numerical Modelling of Devolatilization in Pulverised Coal Injection Inside a Hot Coflowing Air Flow.- Flame Stabilization in a Supersonic Combustor.- Mixing Problems in Supersonic Combustion.- Morphology of Flames Submitted to Pressure Waves.- Control of Turbulence in Combustion.- Progress Toward Shock Enhancement of Supersonic Combustion Processes.