: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 1 MUSCLES Modelling of UnSteady Combustion in Low Emission Systems G4RD-CT R&T project within the 5 th Framework program of the European Union:

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy Experimental study on swirling premixing devices Deliverables: D2.17(month 24) Data set of experimental results on the LPP injector (basic configuration) Targets: Effect of the fuel spray on the unsteady flow characteristics of the LPP device (effect on the helicoidal vortex formation) Effect of the organised unsteady flow structures on fuel vaporisation and mixing processes

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 3 Instrumentation set-up Air cooled pressure transducer for unsteady measurements: LDA PIV PDA

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 4 Operating conditions LDV/PDA traverse Combustion chamber Premixing duct Fuel nozzle Swirlers

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 5 Air flow: velocity profiles Axial velocity Radial velocity Tangential velocity T air =293K No fuel injection

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 6 Air flow: unsteady characterisation 0 mm 56 mm 28 mm 84 mm Axial velocity

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 7 Air flow: spectral analysis 0 mm28 mm 56 mm84 mm Axial velocity

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 8 Air flow: unsteady characterisation 0 mm28 mm 56 mm 84 mm Radial velocity 0 mm28 mm 56 mm 84 mm Tangential velocity

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 9 Air flow: spectral analysis 0 mm28 mm 56 mm 84 mm Radial velocity 0 mm28 mm 56 mm 84 mm Tangential velocity

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 10 Air flow: effects of air preheating and fuel injection T air =293K No fuel injection T air =450K With fuel injection

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 11 Air flow: effects of air preheating and fuel injection 0 mm28 mm 56 mm 84 mm Radial velocity 0 mm28 mm 56 mm 84 mm Radial velocity f= 290Hz

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 12 Air flow: effects of air preheating and fuel injection

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 13 Fuel flow: velocity profile T air =450K Fuel droplets T air =450K Air

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 14 Fuel flow: droplets diameter profile T air =450K Fuel droplets T air =293K Nozzle characterisation

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 15 Fuel flow: droplets diameter profile T air =450K Fuel droplets

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 16 Fuel flow: unsteady characterisation 28 mm56 mm68 mm Velocity fluctuations 28 mm56 mm68 mm Spectral analysis

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 17 Fuel flow: unsteady characterisation T air =450K Fuel droplets

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 18 Fuel flow: droplets distribution

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 19 Fuel flow: droplets distribution

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 20 Fuel flow: droplets distribution T air =450K T air =530K

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 21 Systematic downstream fuel droplets characterisation Radial postition r/D R [mm] 130, , , , , , , , , , , , ,23124 Axial traverse x/D X [mm] 10, , , , mm

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 22 Systematic downstream fuel droplets characterisation Mean axial velocity

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 23 Systematic downstream fuel droplets characterisation Traversa 1Traversa 3 Traversa 2 Traversa 4 RMS axial velocity

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 24 Systematic downstream fuel droplets characterisation Droplets size distribution

: Mid-Term meeting, September 2004, Karlsruhe Presented by: Mario Caruggi UNIGE-DIMSET Dept. of Fluid Machinery, Energy Systems and Transportation - University of Genoa, Italy 25 Conclusions and future activities A complete characterisation of the LPP injector was obtained According to work-plan, the future activities will concern the definition of modified confgurations for the LPP injector and their experimental validation