INGAS Meeting, Regensburg, 13 October 2011Mirko BARATTA INGAS INtegrated GAS Powertrain 1 Meeting – Regensburg Subproject A2 Status (month 31-36) Mirko BARATTA – Politecnico di Torino INGAS Subproject SPA2

INGAS Meeting, Regensburg, 13 October 2011Mirko BARATTA INGAS INtegrated GAS Powertrain 2 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 p rail =20 bar, t i =  s=> DONE p rail = bar, t i =  s=> READY TO BE RUN The most significant tests should be selected (e.g. p rail t i =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 A > Should PT give a contribution to DA2.7? INGAS Subproject SPA2

INGAS Meeting, Regensburg, 13 October 2011Mirko BARATTA INGAS INtegrated GAS Powertrain 3 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 rpm, Full Load –Completion of the mixture formation study »Mixture full load (MCE rpm, SCE – 1500 rpm, MCE – 5000 rpm – COMPLETED »Simulations with different cone angle – TO BE DISCUSSED. INGAS Subproject SPA2

INGAS Meeting, Regensburg, 13 October 2011Mirko BARATTA INGAS INtegrated GAS Powertrain 4 Task A2.2.2 – Development of a new injector concept and optimized nozzle layout Simulation of the real injector layout (3-holes configuration) Transient conditions (variable needle lift – input from Siemens)

INGAS Meeting, Regensburg, 13 October 2011Mirko BARATTA INGAS INtegrated GAS Powertrain 5 Task A2.2.2 – Development of a new injector concept and optimized nozzle layout Simulation of the real injector layout (3-holes configuration) Transient conditions (variable needle lift – input from Siemens) Ti=2000  s Ti=1000  s

INGAS Meeting, Regensburg, 13 October 2011Mirko BARATTA INGAS INtegrated GAS Powertrain 6 Task A2.2.2 – Development of a new injector concept and optimized nozzle layout Simulation of the real injector layout (3-holes configuration) Transient conditions (variable needle lift – input from Siemens) Ti=2000  sTi=1000  s

INGAS Meeting, Regensburg, 13 October 2011Mirko BARATTA INGAS INtegrated GAS Powertrain 7 Task A2.2.2 – Development of a new injector concept and optimized nozzle layout Simulation of the real injector layout (3-holes configuration) Transient conditions (variable needle lift – input from Siemens) Ti=2000  s Ti=1000  s

INGAS Meeting, Regensburg, 13 October 2011Mirko BARATTA INGAS INtegrated GAS Powertrain 8 Task A2.2.2 – Development of a new injector concept and optimized nozzle layout Simulation of the real injector layout (3-holes configuration) Transient conditions (variable needle lift – input from Siemens)

INGAS Meeting, Regensburg, 13 October 2011Mirko BARATTA INGAS INtegrated GAS Powertrain 9 Task A2.2.2 – Development of a new injector concept and optimized nozzle layout Simulation of the real injector layout (3-holes configuration) Model validation ??? Solution #1: using data from MCE (AVL presentation in Oulu) extrapolated points

INGAS Meeting, Regensburg, 13 October 2011Mirko BARATTA INGAS INtegrated GAS Powertrain 10 Task A2.2.2 – Development of a new injector concept and optimized nozzle layout Simulation of the real injector layout (3-holes configuration) Model validation ??? Solution #2: using data from the old PT publication (ASME ICEF )

INGAS Meeting, Regensburg, 13 October 2011Mirko BARATTA INGAS INtegrated GAS Powertrain Task A2.4.2 – Analysis of mixture formation Experimental (statistical) Simulated Qualitative model validation based on statistical pictures (from the Oulu meeting)

INGAS Meeting, Regensburg, 13 October 2011Mirko BARATTA INGAS INtegrated GAS Powertrain 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) 

INGAS Meeting, Regensburg, 13 October 2011Mirko BARATTA INGAS INtegrated GAS Powertrain 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) 

INGAS Meeting, Regensburg, 13 October 2011Mirko BARATTA INGAS INtegrated GAS Powertrain 14 Task A2.4.2 – Analysis of mixture formation Quantitative model validation 1500 rpm – RAFR = 1.0 – Homogeneous operation – Full Load  = 50° CA BTDC

INGAS Meeting, Regensburg, 13 October 2011Mirko BARATTA INGAS INtegrated GAS Powertrain 15 Task A2.4.2 – Analysis of mixture formation Quantitative model validation 2000 rpm – imep=3 bar – RAFR = 1.8 – Stratified operation 

INGAS Meeting, Regensburg, 13 October 2011Mirko BARATTA INGAS INtegrated GAS Powertrain 16 Task A2.4.2 – Analysis of mixture formation 200° CA BTDC 8° CA ASI Mixture full load 1500 rpm – IMEP=23 bar – EOI=120 deg 160° CA BTDC 48° CA ASI 5° CA BTDC 203° CA ASI

INGAS Meeting, Regensburg, 13 October 2011Mirko BARATTA INGAS INtegrated GAS Powertrain 17 Task A2.4.2 – Analysis of mixture formation Mixture full load 1500 and 5000 rpm – MCE f m = fraction of flammable mixture f f = fraction of flammable fuel

INGAS Meeting, Regensburg, 13 October 2011Mirko BARATTA INGAS INtegrated GAS Powertrain 18 Task A2.4.2 – Analysis of mixture formation Mixture formation for different EOIs – 2000rpm, IMEP=3 bar EOI 70 EOI 220 EOI 195  TDC

INGAS Meeting, Regensburg, 13 October 2011Mirko BARATTA INGAS INtegrated GAS Powertrain 19 Task A2.4.2 – Analysis of mixture formation Mixture formation for different EOIs – 2000rpm, IMEP=3 bar Correlation with MCE combustion and emission data (from DA2.11)

INGAS Meeting, Regensburg, 13 October 2011Mirko BARATTA INGAS INtegrated GAS Powertrain 20 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 ICES , ASME ICED Spring Technical Conference, May 6-9, 2012, Torino, Piemonte, Italy. INGAS Subproject SPA2

INGAS Meeting, Regensburg, 13 October 2011Mirko BARATTA INGAS INtegrated GAS Powertrain 21 Next Steps (month 37-42) –To be discussed INGAS Subproject SPA2

INGAS Meeting, Regensburg, 13 October 2011Mirko BARATTA INGAS INtegrated GAS Powertrain 22 Problems / Changes compared to plan –No problems, no changes. INGAS Subproject SPA2