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INGAS Subproject SPA2

INGAS Subproject SPA2. Meeting – Regensburg Subproject A2 Status (month 31-36) Mirko BARATTA – Politecnico di Torino. INGAS Subproject SPA2. WP A2.2 – Injection system development Main objectives and Status summary:

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INGAS Subproject SPA2

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  1. INGAS Subproject SPA2 Meeting – Regensburg Subproject A2 Status (month 31-36) Mirko BARATTA – Politecnico di Torino

  2. INGAS Subproject SPA2 • WP A2.2 – Injection system development • Main objectives and Status summary: -Setup of a model of the real-geometry injector with moving needle, in order to investigate the injector non-linearity for short injection duration. - Simulations run with lift profiles measured by Siemens prail=20 bar, ti=500-1000-1500-2000 s => DONE prail=14-16-18 bar, ti=500-1000-1500-2000 s => READY TO BE RUN The most significant tests should be selected (e.g. prail-sweep @ ti=1000 s). -> Should we consider this work as pertaining to Task A2.2.2 (“Development of a new injector concept and optimized nozzle layout”) or Task A2.2.4 (“Analysis and improvement of the over all injection system”)? Based on DoW, PT has no MM in Task A2.2.4. -> Should PT give a contribution to DA2.7?

  3. INGAS Subproject SPA2 • WP A2.4 - Combustion-system development • Main objectives and Status summary: • New model validation based on PLIF signal processing within Matlab environment • Model validation done also @1500 rpm, Full Load • Completion of the mixture formation study • Mixture formation @ full load (MCE - 1500 rpm, SCE – 1500 rpm, MCE – 5000 rpm – COMPLETED • Simulations with different cone angle – TO BE DISCUSSED.

  4. Task A2.2.2 – Development of a new injector concept and optimized nozzle layout Simulationof the realinjector layout (3-holes configuration)Transientconditions (variableneedle lift – input from Siemens)

  5. Task A2.2.2 – Development of a new injector concept and optimized nozzle layout Simulationof the realinjector layout (3-holes configuration)Transientconditions (variableneedle lift – input from Siemens) Ti=1000ms Ti=2000ms

  6. Task A2.2.2 – Development of a new injector concept and optimized nozzle layout Simulationof the realinjector layout (3-holes configuration)Transientconditions (variableneedle lift – input from Siemens) Ti=1000ms Ti=2000ms

  7. Task A2.2.2 – Development of a new injector concept and optimized nozzle layout Simulationof the realinjector layout (3-holes configuration)Transientconditions (variableneedle lift – input from Siemens) Ti=1000ms Ti=2000ms

  8. Task A2.2.2 – Development of a new injector concept and optimized nozzle layout Simulationof the realinjector layout (3-holes configuration)Transientconditions (variableneedle lift – input from Siemens)

  9. Task A2.2.2 – Development of a new injector concept and optimized nozzle layout Simulationof the realinjector layout (3-holes configuration)Modelvalidation ??? • Solution #1: using data from MCE (AVL presentation in Oulu) extrapolated points

  10. Task A2.2.2 – Development of a new injector concept and optimized nozzle layout Simulationof the realinjector layout (3-holes configuration)Modelvalidation ??? • Solution #2: using data from the old PT publication (ASME ICEF2010-35104)

  11. Task A2.4.2 – Analysis of mixture formation Qualitative model validation based on statistical pictures (from the Oulu meeting) Experimental (statistical) Simulated

  12. Task A2.4.2 – Analysis of mixture formation Quantitative model validation 1500 rpm – RAFR = 1.0 – Homogeneous operation – Full Load  = 165° CA BTDC (15° CA ASI) 

  13. Task A2.4.2 – Analysis of mixture formation Quantitative model validation 1500 rpm – RAFR = 1.0 – Homogeneous operation – Full Load  = 150° CA BTDC (30° CA ASI) 

  14. Task A2.4.2 – Analysis of mixture formation Quantitative model validation 1500 rpm – RAFR = 1.0 – Homogeneous operation – Full Load  = 50° CA BTDC

  15. Task A2.4.2 – Analysis of mixture formation Quantitative model validation 2000 rpm – imep=3 bar – RAFR = 1.8 – Stratified operation 

  16. Task A2.4.2 – Analysis of mixture formation Mixture formation @ full load 1500 rpm – IMEP=23 bar – EOI=120 deg 200° CA BTDC 8° CA ASI 160° CA BTDC 48° CA ASI 5° CA BTDC 203° CA ASI

  17. Task A2.4.2 – Analysis of mixture formation Mixture formation @ full load 1500 and 5000 rpm – MCE fm = fraction of flammable mixture ff = fraction of flammable fuel

  18. Task A2.4.2 – Analysis of mixture formation Mixture formation for different EOIs – 2000rpm, IMEP=3 bar  Contours @ TDC EOI 220 EOI 195 EOI 70

  19. Task A2.4.2 – Analysis of mixture formation Mixture formation for different EOIs – 2000rpm, IMEP=3 bar Correlationwith MCE combustion and emission data (from DA2.11)

  20. INGAS Subproject SPA2 • Dissemination • Mirko Baratta, Nicola Rapetto, Ezio Spessa, Alois Fuerhapter, Harald Philipp, “Numerical and Experimental Analysis of Mixture Formation and Performance in a Direct Injection CNG Engine”, SAE 2012 World Congress, Detroit, MI, USA. • Mirko Baratta, Andrea E. Catania, Nicola Rapetto, Alois Fuerhapter, Matthias Gerlich, Wolfgang Zoels, “DI-CNG Injector Characterization at Small Energizing Times by Means of Numerical Simulation”, ASME Paper ICES2012-81186, ASME ICED Spring Technical Conference, May 6-9, 2012, Torino, Piemonte, Italy.

  21. INGAS Subproject SPA2 • Next Steps (month 37-42) • To be discussed

  22. INGAS Subproject SPA2 • Problems / Changes compared to plan • No problems, no changes.

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