1. ECN 3 Diesel Combustion Topic 2: Mixing/chemistry interaction INTRODUCTION José M. García Oliver CMT-UPVLC Ann Arbor, April 4th 2014

2. ECN 3 – Topic 2 2 April 4 th 2014 TARGETS RELATED TO SPRAY COMBUSTION AFTER ECN2 1)Combustion modeling fidelity with different implementations (well- mixed, flamelet, PDF, CMC, etc.) 2)Ignition and lift-off length dependencies, with comparison to quantitative measured scalar profiles rather than simple thresholding 3)RANS, engineering LES, and high-fidelity LES modeling 4)Soot growth, oxidation, and particle structure INTRODUCTION TO TOPIC 2

3. ECN 3 – Topic 2 3 April 4 th 2014 CONTRIBUTORS AND DEVELOPED TASKS INTRODUCTION TO TOPIC 2 EXPERIMENTSMODELLING CONTRIBUTORSCMT, IFPEN, SNL, TUE ANL, ETH, POLIMI, TUE, UNSW, UWISC METHODOLOGY - TOOLS -Standardization of experimental contributions with new techniques -Comparison of modelling (TCI, soot) approaches ANALYSIS - PHENOMENA -Integration of both modelling and experimental results -Definition of scientific questions to be answered

4. ECN 3 – Topic 2 4 April 4 th 2014 INTRODUCTION TO TOPIC 2 TOPIC 2 2.1 COMBUSTION INDICATORS 2.2 FLAME STRUCTURE 2.3 SOOT FIELD

5. ECN 3 – Topic 2 5 April 4 th 2014 INTRODUCTION TO TOPIC 2 TOPIC 2 2.1 COMBUSTION INDICATORS 2.2 FLAME STRUCTURE 2.3 SOOT FIELD Methodology How similar/different are experimental/modelling results among different groups regarding such indicators? Analysis Confrontation for Spray A + Parametric variations 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…)

6. ECN 3 – Topic 2 6 April 4 th 2014 INTRODUCTION TO TOPIC 2 TOPIC 2 2.1 COMBUSTION INDICATORS 2.2 FLAME STRUCTURE 2.3 SOOT FIELD 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? Objectives Analysis of flame spatial and temporal evolution in terms of – Ignition locations – Diffusion flame front – Flow evolution after start of combustion

7. ECN 3 – Topic 2 7 April 4 th 2014 INTRODUCTION TO TOPIC 2 TOPIC 2 2.1 COMBUSTION INDICATORS 2.2 FLAME STRUCTURE 2.3 SOOT FIELD 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? Objectives Quantification of flame soot distribution

8. ECN 3 – Topic 2 8 April 4 th 2014 INTRODUCTION TO TOPIC 2 SUBTOPICPEOPLE COMBUSTION INDICATORS -G D’Errico -O A Kuti -S-Y Lee -M Bardi FLAME STRUCTURE -H Baya -E Hawkes -L-M Malbec -M Meijer -B Somers -Y Wright SOOT FIELD -M Bolla -S Skeen -D Haworth