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ECN 3 Diesel Combustion Topic 2: Mixing/chemistry interaction INTRODUCTION

ECN 3 Diesel Combustion Topic 2: Mixing/chemistry interaction INTRODUCTION. José M. García Oliver CMT-UPVLC Ann Arbor, April 4th 2014. INTRODUCTION TO TOPIC 2. TARGETS RELATED TO SPRAY COMBUSTION AFTER ECN2

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ECN 3 Diesel Combustion Topic 2: Mixing/chemistry interaction INTRODUCTION

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  1. ECN 3 • Diesel Combustion Topic 2: Mixing/chemistry interaction • INTRODUCTION José M. García Oliver CMT-UPVLC Ann Arbor, April4th 2014

  2. INTRODUCTION TO TOPIC 2 TARGETS RELATED TO SPRAY COMBUSTION AFTER ECN2 • Combustion modeling fidelity with different implementations (well-mixed, flamelet, PDF, CMC, etc.) • Ignition and lift-off length dependencies, with comparison to quantitative measured scalar profiles rather than simple thresholding • RANS, engineering LES, and high-fidelity LES modeling • Soot growth, oxidation, and particle structure

  3. INTRODUCTION TO TOPIC 2 CONTRIBUTORS AND DEVELOPED TASKS

  4. INTRODUCTION TO TOPIC 2

  5. INTRODUCTION TO TOPIC 2 Objectives • Definition and confrontation of quantitative parameters that can serve for a global description of the combustion process • Ignition delay • Lift-off Length • Others?? (e.g. reactive spray penetration, heat release rate…) Methodology • How similar/different are experimental/modelling results among different groups regarding such indicators? Analysis • Confrontation for Spray A + Parametric variations

  6. INTRODUCTION TO TOPIC 2 Objectives • Analysis of flame spatial and temporal evolution in terms of • Ignition locations • Diffusion flame front • Flow evolution after start of combustion Methodology • How similar/different are experimental/modelling results among different groups for spatial and temporal flame evolution? Analysis • How does flame structure evolve along the injection?

  7. INTRODUCTION TO TOPIC 2 Objectives • Quantification of flame soot distribution Analysis • Which is the soot distribution within spray A? • How is it modified with different parametric variables? • How accurate do different modelling approaches predict the soot field?

  8. INTRODUCTION TO TOPIC 2

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