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MUSCLES Modelling of UnSteady Combustion in Low Emission Systems

MUSCLES Modelling of UnSteady Combustion in Low Emission Systems. G4RD-CT-2002-00644 R&T project within the 5 th Framework program of the European Union:. 2.3.1 Experimental study on swirling premixing devices. Deliverables:

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MUSCLES Modelling of UnSteady Combustion in Low Emission Systems

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  1. MUSCLESModelling of UnSteady Combustion in Low Emission Systems G4RD-CT-2002-00644 R&T project within the 5th Framework program of the European Union:

  2. 2.3.1 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

  3. Instrumentation set-up LDA PIV PDA Air cooled pressure transducer for unsteady measurements:

  4. Operating conditions Swirlers LDV/PDA traverse Premixing duct Combustion chamber Fuel nozzle

  5. Air flow: velocity profiles Axial velocity Tair=293K No fuel injection Radial velocity Tangential velocity

  6. Air flow: unsteady characterisation Axial velocity 0 mm 28 mm 56 mm 84 mm

  7. Air flow: spectral analysis Axial velocity 0 mm 28 mm 56 mm 84 mm

  8. Air flow: unsteady characterisation Radial velocity 0 mm 28 mm 56 mm 84 mm Tangential velocity 0 mm 28 mm 56 mm 84 mm

  9. Air flow: spectral analysis Radial velocity 0 mm 28 mm 56 mm 84 mm Tangential velocity 0 mm 28 mm 56 mm 84 mm

  10. Air flow: effects of air preheating and fuel injection Tair=450K With fuel injection Tair=293K No fuel injection

  11. Air flow: effects of air preheating and fuel injection Axial velocity 0 mm 28 mm 56 mm 84 mm 0 mm 28 mm 56 mm 84 mm f= 290Hz

  12. Air flow: effects of air preheating and fuel injection -12 0 60

  13. Fuel flow: velocity profile Tair=450K Fuel droplets Tair=450K Air

  14. Fuel flow: droplets diameter profile Tair=450K Fuel droplets Tair=293K Nozzle characterisation

  15. Fuel flow: droplets diameter profile Tair=450K Fuel droplets

  16. Fuel flow: unsteady characterisation Velocity fluctuations 28 mm 56 mm 68 mm Spectral analysis 28 mm 56 mm 68 mm

  17. Fuel flow: unsteady characterisation Tair=450K Fuel droplets

  18. Fuel flow: droplets distribution

  19. Fuel flow: droplets distribution

  20. Fuel flow: droplets distribution Tair=450K Tair=530K

  21. Systematic downstream fuel droplets characterisation 52mm

  22. Systematic downstream fuel droplets characterisation Mean axial velocity

  23. Systematic downstream fuel droplets characterisation RMS axial velocity Traversa 1 Traversa 3 Traversa 2 Traversa 4

  24. Systematic downstream fuel droplets characterisation Droplets size distribution

  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

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