Donald W. Bahr

Bio: Donald W. Bahr is an academic researcher from National Academy of Engineering. The author has contributed to research in topics: Combustion & Combustion chamber. The author has an hindex of 1, co-authored 1 publications receiving 563 citations.

GAS TURBINE COMBUSTION—Alternative Fuels and Emissions

Abstract: Basic Considerations Introduction Early Combustor Developments Basic Design Features Combustor Requirements Combustor Types Diffuser Primary Zone Intermediate Zone Dilution Zone Fuel Preparation Wall Cooling Combustors for Low Emissions Combustors for Small Engines Industrial Chambers Combustion Fundamentals Introduction Classification of Flames Physics or Chemistry? Flammability Limits Global Reaction-Rate Theory Laminar Premixed Flames Laminar Diffusion Flames Turbulent Premixed Flames Flame Propagation in Heterogeneous Mixtures of Fuel Drops, Fuel Vapor, and Air Droplet and Spray Evaporation Ignition Theory Spontaneous Ignition Flashback Stoichiometry Adiabatic Flame Temperature Diffusers Introduction Diffuser Geometry Flow Regimes Performance Criteria Performance Effect of Inlet Flow Conditions Design Considerations Numerical Simulations Aerodynamics Introduction Reference Quantities Pressure-Loss Parameters Relationship between Size and Pressure Loss Flow in the Annulus Flow through Liner Holes Jet Trajectories Jet Mixing Temperature Traverse Quality Dilution Zone Design Correlation of Pattern Factor Data Rig Testing for Pattern Factor Swirler Aerodynamics Axial Swirlers Radial Swirlers Flat Vanes versus Curved Vanes Combustion Performance Introduction Combustion Efficiency Reaction-Controlled Systems Mixing-Controlled Systems Evaporation-Controlled Systems Reaction- and Evaporation-Controlled Systems Flame Stabilization Bluff-Body Flameholders Mechanisms of Flame Stabilization Flame Stabilization in Combustion Chambers Ignition Assessment of Ignition Performance Spark Ignition Other Forms of Ignition Factors Influencing Ignition Performance The Ignition Process Methods of Improving Ignition Performance Fuel Injection Basic Processes in Atomization Classical Mechanism of Jet and Sheet Breakup Prompt Atomization Classical or Prompt? Drop-Size Distributions Atomizer Requirements Pressure Atomizers Rotary Atomizers Air-Assist Atomizers Airblast Atomizers Effervescent Atomizers Vaporizers Fuel Nozzle Coking Gas Injection Equations for Mean Drop Size SMD Equations for Pressure Atomizers SMD Equations for Twin-Fluid Atomizers SMD Equations for Prompt Atomization Internal Flow Characteristics Flow Number Discharge Coefficient Spray Cone Angle Radial Fuel Distribution Circumferential Fuel Distribution Combustion Noise Introduction Direct Combustion Noise Combustion Instabilities Control of Combustion Instabilities Modeling of Combustion Instabilities Heat Transfer Introduction Heat-Transfer Processes Internal Radiation External Radiation Internal Convection External Convection Calculation of Uncooled Liner Temperature Film Cooling Correlation of Film-Cooling Data Practical Applications of Transpiration Cooling Advanced Wall-Cooling Methods Augmented Cold-Side Convection Thermal Barrier Coatings Materials Liner Failure Modes Emissions Introduction Concerns Regulations Mechanisms of Pollutant Formation Pollutants Reduction in Conventional Combustors Pollutants Reduction by Control of Flame Temperature Dry Low-Oxides of Nitrogen Combustors Lean Premix Prevaporize Combustion Rich-Burn, Quick-Quench, Lean-Burn Combustor Catalytic Combustion Correlation and Modeling of Oxides of Nitrogen and Carbon Monoxide Emissions Concluding Remarks Alternative Fuels Introduction Types of Hydrocarbons Production of Liquid Fuels Fuel Properties Combustion Properties of Fuels Classification of Liquid Fuels Classification of Gaseous Fuels Alternative Fuels Synthetic Fuels Index References appear at the end of each chapter