1st Edition

Fundamentals of Premixed Turbulent Combustion

By Andrei Lipatnikov Copyright 2013
    548 Pages 229 B/W Illustrations
    by CRC Press

    548 Pages 229 B/W Illustrations
    by CRC Press

    Lean burning of premixed gases is considered to be a promising combustion technology for future clean and highly efficient gas turbine combustors. Yet researchers face several challenges in dealing with premixed turbulent combustion, from its nonlinear multiscale nature and the impact of local phenomena to the multitude of competing models. Filling a gap in the literature, Fundamentals of Premixed Turbulent Combustion introduces the state of the art of premixed turbulent combustion in an accessible manner for newcomers and experienced researchers alike.

    To more deeply consider current research issues, the book focuses on the physical mechanisms and phenomenology of premixed flames, with a brief discussion of recent advances in partially premixed turbulent combustion. It begins with a summary of the relevant knowledge needed from disciplines such as thermodynamics, chemical kinetics, molecular transport processes, and fluid dynamics. The book then presents experimental data on the general appearance of premixed turbulent flames and details the physical mechanisms that could affect the flame behavior. It also examines the physical and numerical models for predicting the key features of premixed turbulent combustion.

    Emphasizing critical analysis, the book compares competing concepts and viewpoints with one another and with the available experimental data, outlining the advantages and disadvantages of each approach. In addition, it discusses recent advances and highlights unresolved issues. Written by a leading expert in the field, this book provides a valuable overview of the physics of premixed turbulent combustion. Combining simplicity and topicality, it helps researchers orient themselves in the contemporary literature and guides them in selecting the best research tools for their work.

    General Knowledge on Reacting Gas Mixtures
    Basic Characteristics of Gas Mixtures
    Chemical Reactions in Flames
    Balance Equations

    Unperturbed Laminar Premixed Flame
    Flow in a Laminar Premixed Flame
    AEA Theory of Unperturbed Laminar Premixed Flame
    Laminar Flame Speed and Thickness
    Summary

    A Brief Introduction to Turbulence
    Characteristics of an Incompressible Turbulent Flow
    Theory of Homogeneous Isotropic Turbulence
    Reynolds-Averaged Navier-Stokes Approach to Numerical Simulations of Turbulent Flows
    Turbulent Diffusion
    Notes

    Phenomenology of Premixed Turbulent Combustion
    Mean Flame Brush Thickness
    Turbulent Flame Speed and Burning Velocity
    Mean Structure of a Premixed Turbulent Flame
    Summary

    Physical Mechanisms and Regimes of Premixed Turbulent Combustion
    Flame Wrinkling and Flamelet Regime
    Variations in Flamelet Structure Due to Turbulent Stretching
    Flame Instabilities
    Regimes of Premixed Turbulent Combustion
    Flame Propagation along Vortex Tubes
    Concluding Remarks

    Influence of Premixed Combustion on Turbulence

    Countergradient Scalar Transport in Turbulent Premixed Flames
    Turbulence in Premixed Flames
    Summary

    Modeling of Premixed Burning in Turbulent Flows
    Fractal Approach to Evaluating Turbulent Burning Velocity
    Zimont Model of Burning Velocity in Developing Turbulent Premixed Flames
    Modeling of Effects of Turbulence on Premixed Combustion in RANS Simulations
    Models of Molecular Transport Effects in Premixed Turbulent Flames
    Chemistry in RANS Simulations of Premixed Turbulent Combustion: Flamelet Library
    Large Eddy Simulation of Premixed Turbulent Combustion

    Introduction to Nonpremixed Combustion
    Laminar Diffusion Flames
    Turbulent Diffusion Flames
    Summary

    Partially Premixed Turbulent Flames
    Effects Addressed in RANS or LES Studies of Partially Premixed Turbulent Flames
    Effects Ignored in RANS or LES Studies of Partially Premixed Turbulent Flames
    Use of Presumed PDFs for Modeling Both Premixed and Diffusion Burning Modes
    Summary

    References

    Index

    Biography

    Andrei N. Lipatnikov, Ph.D., is an associate professor at the Department of Applied Mechanics at Chalmers University of Technology, Gothenburg, Sweden. He graduated from Moscow Institute of Physics and Technology (MIPT) in 1984 and obtained his Ph.D. from the same institute in 1987. Dr. Lipatnikov’s academic activities have been concerned with research on turbulent and laminar combustion processes, pollutant formation in flames, autoignition of premixed mixtures, and numerical modeling of combustion in spark ignition engines. He has published more than 190 scientific contributions, including 59 journal papers. Dr. Lipatnikov is a member of the Combustion Institute.