Problem Statement and Motivation

Key Achievements and Future GoalsTechnical Approach

Combustion & Emissions Research Relevant to Practical SystemsS. K. Aggarwal, MIE/UIC; I. K. Puri, Virginia Tech; V. R. Katta, ISSI; D. Longman, ANL.

Primary Sponsors: Argonne National Laboratory (ANL), NASA, NSF

• 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.

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.

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.

• 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.

• Experimental and numerical investigation of structure and emission characteristics ofn-heptane flames.