Gasoline Spray (Spray G)

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Presentation transcript:

Gasoline Spray (Spray G) ECN3 Workshop Spray G Orangizer: Scott Parrish (GM)

Spray G - Program 13:00 Introduction Experimental Activities 13:15 3.1 Injector geometry assessment Yongjin Jung* (KAIST), Peter Hutchins (Infineum/ESRF) 13:20 3.2 Rate-of-injection Raúl Payri* (CMT), Scott Parrish (GM), 13:30 3.3 Spray Visualization (liquid/vapor penetration & angle) Julien Manin* (SNL), Gilles Bruneaux (IFPEN), Scott Parrish (GM), Luigi Allocca (IM), Josh Lacey (Melbourne) 14:00 3.4 Drop size measurement (Phase Doppler Interferometry) Scott Parrish* (GM) Modeling Activities 14:15 3.5 Internal flow modeling using ideal geometry Ron Grover* (GM) 14:30 3.6 Spray modeling Noah Van Dam* (UW), Lucchini (Politecnico di Milano), Som (ANL) 15:00 Discussion Period 15:30 Break *Discussion Leader

Spray G - Injector Specification Considerations for injector specification Hopefully the output of the group will be transferable and relevant to future advanced engine implementations It is important to keep in mind the spray requirements of advanced applications such as stratified spray-guided, HCCI and boosted dilute systems The interaction between adjacent spray plumes is of great importance to both current production and advanced gasoline applications Spray plume interaction is influenced by a number of things including: spray pattern L/D ratio hole manufacturing method proximity of the holes on the nozzle Successful mixture preparation relies on a proper combination of all these parameters

Spray G - Injector Parameter Consensus Number of holes 8 Spray shape circular Spray angle 80 Bend angle 0  L/D ratio 1.4 Hole shape straight Manufacturing EDM Flow rate 15 cc/s @ 10 MPa

Thanks to Delphi! Dan Varble, Lee Markle Spray G – Preliminary Data (Delphi) Thanks to Delphi! Dan Varble, Lee Markle “Burn In” (20 million cycles) Leak rate Spray patternation (high resolution mechanical) Spray imaging (spray angle, penetration) Drop sizing (laser diffraction) High-speed near tip imaging (end of injection quality) Flow curves (5,10,15,20 Mpa) Maximum opening pressure Note: Preliminary spray data from Delphi was acquired according to the SAE J2715 standard NOT at Spray G conditions

Spray G – Mechanical Patternation (Delphi) Patternation Example Plume Centroid Locations 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 Injector

Spray G - Axial Penetration, Spray Angle (Delphi) Injector

Spray G - Injector Orientations Primary Secondary 5 5 6 6 4 4 7 3 7 3 8 8 2 6,7,8 1,5 2,3,4 7,8 1,6 2,5 3,4 1 2 1 Camera Camera rotate CW looking behind injector through fuel tube

Spray G - Spray Imaging (Delphi) Injector 16 Injector 17 Injector 18 Injector 22 Injector 24 Injector 28

Spray G - Spray Imaging (Delphi) Injector 16 Injector 17 Injector 18 Injector 22 Injector 24 Injector 28

Spray G - Mechanical Patternation (Delphi) Injector 16 Injector 17 Injector 18 Injector 22 Injector 24 Injector 28

Spray G - Conditions Considerations for choosing operating conditions Operating conditions of gasoline engines vary widely Most all current production engines operate with early injection where sprays can be subjected to low pressures resulting in flash boiling Most advanced engine concepts rely on late injection where sprays are subjected to elevated ambient pressures and temperatures What institutions are capable of conducting spray measurements with ambient pressure below atmospheric?

Spray G - Conditions Parameter Value Fuel Iso-octane Fuel pressure 20 MPa Fuel temperature 90ᵒ C Injector temperature 90ᵒ C Ambient temperature 300ᵒ C Ambient density 3.5 kg/m3 5.97 Bar (Nitrogen) 5.77 Bar (Air) Injected quantity 10 mg Number of injections 1

Spray G - Average Flow (GM)

Spray G - Program 13:00 Introduction Experimental Activities 13:15 3.1 Injector geometry assessment Yongjin Jung* (KAIST), Peter Hutchins (Infineum/ESRF) 13:20 3.2 Rate-of-injection Raúl Payri* (CMT), Scott Parrish (GM), 13:30 3.3 Spray Visualization (liquid/vapor penetration & angle) Julien Manin* (SNL), Gilles Bruneaux (IFPEN), Scott Parrish (GM), Luigi Allocca (IM), Josh Lacey (Melbourne) 14:00 3.4 Drop size measurement (Phase Doppler Interferometry) Scott Parrish* (GM) Modeling Activities 14:15 3.5 Internal flow modeling using ideal geometry Ron Grover* (GM) 14:30 3.6 Spray modeling Noah Van Dam* (UW), Lucchini (Politecnico di Milano), Som (ANL) 15:00 Discussion Period 15:30 Break *Discussion Leader

Spray G - Flash Boiling Conditions 40 50 60 70 80 90 Injector Included Spray Angle (º) 101 120 Ambient Pressure (kPa)

Spray G - Flash Boiling Conditions 40 50 60 70 80 90 Injector Included Spray Angle (º) 101 120 Ambient Pressure (kPa)