Combustion & Emissions Research Relevant to Practical Systems

1. Quantifying the Effects of Fluid Flow Characteristics Near the Nozzle Tip on Diesel Engine Particulate Emissions • ANL’s Advanced Photon Source (APS) is used to obtain quantitative data of CAT HEUI 315B fuel injector spray. • State-of-art flame diagnostic tools will be used to obtain in-cylinder images and data of the fuel injector spray and combustion in a CAT single cylinder engine. • Parametric studies will be performed to quantify the effects of fuel injection pressure, tip orifice size and geometry on engine performance, emissions, and particulate formation. • In collaboration with CAT the KIVA-3V code will be developed further and various sub-models, such as for fluid breakup, will be improved. • Simulation of Partially Premixed Flames Burning Various Fuels • Blending Hydrogen to primary reference fuels to improve combustion and emission characteristics. • Experimental and numerical investigation of structure and emission characteristics of • n-heptaneflames. • Flame structure, extinction, and emission characteristics of high pressure flames with different fuels [H2, CH4, n-heptane, Synthetic Gas] in engine-like conditions. • Innovative strategies to reduce combustion-generated pollutants. • Extensive use of computer graphics and animation. Combustion & Emissions Research Relevant to Practical Systems S. K. Aggarwal, MIE/UIC; I. K. Puri, Virginia Tech; V. R. Katta, ISSI; D. Longman, ANL. Primary Sponsors: Argonne National Laboratory (ANL), NASA, NSF • Gravitational Effects on Partially Flames • Fire suppression on earth and in space • Multi-scale modeling of combustion and two-phase phenomena. • Combine advanced CFD methods • with detailed chemistry & transport models • to characterize effect of fire suppressants. • Developed comprehensive CFD-based reacting flow codes using detailed chemistry and transport models for a variety of flames. • Application of these codes to investigate • structure and emission characteristics of high-pressure partially premixed flames (PPF). • stabilization, liftoff, and blowout of non-premixed and partially premixed flames in Earth and Space environments. • effect of hydrogen blending with hydrocarbon fuels on flame stability and emissions of NOx, soot, etc. • combustion and emission characteristics of alternative fuels, such as hydrogen, synthetic gas, ethanol, and bio-diesels. • Develop innovative strategies including partial premixing, alternative fuels, and fuel blending to improve combustor performance and reduce pollutants emissions.