Multi-Fuel and Mixed-Mode IC Engine Combustion Simulation with a Detailed Chemistry Based Progress Variable Library Approach

Transcription

1 Mul-Fuel and Med-Mode IC Engne Combuson Smulaon wh a Dealed Chemsry Based Progress Varable Lbrary Approach

2 Conens Inroducon Approach Resuls Conclusons 2

3 Inroducon New Combuson Model- PVM-MF New Legslaons Force Modern ICE Engnes Hgher Effcency Lower Emsson Modern Engnes Organze Combuson Dfferenly Wder Range of Odzer/Fuel/EGR Coesng Dfferen Types of Combuson Mul-Fuel Shorer Operang Tme Scales (hgher Speed) A New Combuson Analyss Tool Developed Targeng Dealed Chemsry Based Capable of Dfferen/Med Type of Combuson Capable of Mul-Fuel Low Compuaonal Cos 3

4 Conens Inroducon Approach Flow solver: Turbulen Flow + Speces Transpor Chemsry Solver: Reacon hrough a Pre-solved Lbrary Brdge: Combuson Progress Varable Resuls Conclusons 4

5 Approach Pre-Solved PVM-MF Lbrary Govern equaons dy d w PVM-Lbrary Inpu/Oupu: A se of pre-solved 0-D soluons s re-organzed as follow funcon n able form y F() The ndependen varables and dependen varables dh d dp d P( ) H ( U ) C EGR EQ y M W, C A Y 1 A 6 reacon / ransporng hermal properes speces / quany oupu 5

6 Approach Pre-Solved PVM Lbrary con. Lookup Lbrary y» CFD flow solver provdes o Lbrary, he lbrary reurns any elemens of afer nerpolang 6

7 Approach CFD Flow Solver Govern Equaons: 7 spray m U spray m j j j j m p U U U, spray H m H p U H H, ) ( spray j j j m w Y U Y Y, ) ( k k k D G k U k k ) ( D G U ) (

8 Approach Combuson Modelng Progress Varable and Is Transpor Equaon Thermodynamc Propery deermnaon 8 C S C C U C C ) ( ) ( ) ( ) ( ) ( ) ( h h h h C T end T T T T K T Y h h ) 298 ( 298 ) / / ( K kg J A T A T A T A T A C P ) / ( kg J A T A T A T A T A A T H ) / / ( K kg J M R R W unversal

9 Approach Four Combuson Modes Combuson Modelng con. HCCI combuson (base mode): Solve progress varable ranspor equaon wh lbrary source erm Lookup PVM-Lb o oban hermal properes dc and speces C d Premed combuson (premed mode): G-eq deermnes flame locaon n SPgnon/man combuson sages Model C dsrbuon based on G dsrbuon Lookup PVM-Lb o oban hermal properes and speces 9

10 Approach Four Combuson Modes Combuson Modelng con. Non-premed combuson (non-premed mode): Reurn o flamele concep - sran-effec model Solve progress varable ranspor equaon wh lbrary source erm Lookup PVM-Lb o oban hermal properes and speces Med Types of Combuson (med-ype mode) Fuel Scalar Dsspaon Rae Level Conrols 10

11 Approach Base Mode Combuson Modelng con. For HCCI Combuson CFD Solver ( P, H,,, C) Solve Progress Varable C Transpor equaon Flamele Solver for Emssons M W, A,... A 1 6 C Y B PVM-Lbrary 11

12 Approach Premed Mode Combuson Modelng con. Flame locaon G-equaon G 0.5l : burned zone G 0.5l : unburned zone 0.5l G 0.5l : burnng zone G U G S Flame hckness l C C Flame Propagaon Speed S l S l k 1.5 G ( S Sl ) G 1 12

13 Approach Premed Mode Combuson Modelng con. For Premed Combuson CFD Solver ( P, H,,, C) M W, A,... A 1 Solve Progress Varable C Transpor equaon n sub-zone of G>0.5l and G<-0.5l 6 C Solve G- Equaon and flame hckness l Lnearly dsrbue C value nsde flame layer - 0.5l<G<0.5l Flamele Solver for Emssons Y B PVM-Lbrary 13

14 Approach Combuson Modelng con. Non-Premed Mode Reurn o Flamele Concep Sran-Effec Model Scalar Dsspaon Rae 14 spray m Z U Z Z ) ( 0 ) ) ( ( C C "2 Z k c ) ( 2 ) ( 2 "2 "2 "2 "2 Z Z U Z Z Z

15 Approach Non-Premed Mode Combuson Modelng con. For non-premed Combuson CFD Solver ( P, H,,, C) M W, A,... A 1 Scalar Dsspaon Solver 6 C Solve Progress Varable C Transpor equaon Flamele Solver for Emssons Y B PVM-Lbrary 15

16 Conens Inroducon Approach Resuls Demonsraon: Mode Concep Eplanaons Demonsraon: Applcaon Conclusons 16

17 Resul-1 Pancake-Engne Demonsraon Engne Parameers Bore Soke Clearance Speed 105mm 109mm 12.5mm 1500rpm Compresson Rao Sweep Volume Spark Plug Locaon Fuel Injecor Locaon No of Inj. Hole 6 Fuel-1 Fuel lre Head Cenre Head Cenre CH4 (gas) n-c7h16 (Lqud) Engne Confguraon and Mesh arrangemen 17

18 Resul-1: Pancake-Engne Demonsraon Same engne runs n 4 dfferen Modes Con. Run Condons Combuson Mode HCCI Premed Non-Premed Med-Type Inal Mass Fracon Yar Inal Mass Fracon YEGR Inal Mass Fracon YCH Inal Mass Fracon Yn-C7H Toal fuel: NG/Desel(mg) 0.0/ / / /20.0 Spark Plug Tmng (CA) Sar of Injecon (CA) End of Injecon (CA)

19 Resul-1: Pancake-Engne Demonsraon HCCI Mode Developmen of Progress Varable Con. CA=734 CA=735 CA=736 CA=737 CA=738 CA=739 CA=740 CA=741 CA=742 CA=743 CA=744 CA=745 CA=746 CA=747 CA=748 CA=749 CA=750 CA=751 CA=752 19

20 Resul-1: Pancake-Engne Demonsraon HCCI Mode Developmen of Temperaure Con. CA=734 CA=735 CA=736 CA=737 CA=738 CA=739 CA=740 CA=741 CA=742 CA=743 CA=744 CA=745 CA=746 CA=747 CA=748 CA=749 CA=750 CA=751 CA=752 20

21 Resul-1: Pancake-Engne Demonsraon Premed Mode Developmen of Progress Varable Con. CA=692 CA=694 CA=696 CA=698 CA=700 CA=702 CA=704 CA=706 CA=708 CA=712 CA=716 CA=720 CA=724 CA=728 CA=732 CA=736 CA=740 CA=744 CA=748 21

22 Resul-1: Pancake-Engne Demonsraon Premed Mode Developmen of Flame fron Con. CA=692 CA=694 CA=696 CA=698 CA=700 CA=702 CA=704 CA=706 CA=708 CA=712 CA=716 CA=720 CA=724 CA=728 CA=732 CA=736 CA=740 CA=744 CA=748 22

23 Resul-1: Pancake-Engne Demonsraon Premed Mode Developmen of Temperaure Con. CA=692 CA=694 CA=696 CA=698 CA=700 CA=702 CA=704 CA=706 CA=708 CA=712 CA=716 CA=720 CA=724 CA=728 CA=732 CA=736 CA=740 CA=744 CA=748 23

24 Resul-1: Pancake-Engne Demonsraon Non-Premed Mode Spray and Fuel Dsrbuon Con. CA=709 CA=711 CA=713 CA=715 CA=717 CA=719 CA=721 CA=723 CA=725 CA=727 CA=730 CA=733 CA=736 CA=739 CA=742 24

25 Resul-1: Pancake-Engne Demonsraon Non-Premed Mode Developmen of Progress Varable Con. CA=709 CA=711 CA=713 CA=715 CA=717 CA=719 CA=721 CA=723 CA=725 CA=727 CA=730 CA=733 CA=736 CA=739 CA=742 25

26 Resul-1: Pancake-Engne Demonsraon Non-Premed Mode Developmen of Temperaure Con. CA=709 CA=711 CA=713 CA=715 CA=717 CA=719 CA=721 CA=723 CA=725 CA=727 CA=730 CA=733 CA=736 CA=739 CA=742 26

27 Resul-1: Pancake-Engne Demonsraon Med-Type Mode Desel Spray and Concenraon Feld Con. CA=716 CA=717 CA=718 CA=719 CA=720 CA=721 CA=722 CA=724 CA=726 CA=729 CA=732 CA=735 CA=738 CA=741 CA=744 CA=747 CA=750 CA=755 CA=760 27

28 Resul-1: Pancake-Engne Demonsraon Med-Type Mode Developmen of Progress Varable Con. CA=716 CA=717 CA=718 CA=719 CA=720 CA=721 CA=722 CA=724 CA=726 CA=729 CA=732 CA=735 CA=738 CA=741 CA=744 CA=747 CA=750 CA=755 CA=760 28

29 Resul-1: Pancake-Engne Demonsraon Med-Type Mode Developmen of Flame Fron Con. CA=716 CA=717 CA=718 CA=719 CA=720 CA=721 CA=722 CA=724 CA=726 CA=729 CA=732 CA=735 CA=738 CA=741 CA=744 CA=747 CA=750 CA=755 CA=760 CA=747 CA=750 CA=755 CA=760 29

30 Resul-1: Pancake-Engne Demonsraon Med-Type Mode Developmen of Temperaure Con. CA=716 CA=717 CA=718 CA=719 CA=720 CA=721 CA=722 CA=724 CA=726 CA=729 CA=732 CA=735 CA=738 CA=741 CA=744 CA=747 CA=750 CA=755 CA=760 30

31 Resul-1: Pancake-Engne Demonsraon Con. Mean Pressure,Temperaure,Hea Release Rae,Prog. Varable HCCI Mode Premed Mode Non-Premed Mode Med Type Mode 31

32 Resul-1: Pancake-Engne Demonsraon Con. Summarze: Physcal/Chemcal processes covered by each mode HCCI mode: Auo-Ignon/Knock based on dealed chemsry soluons Sngle or Mul-Fuel (or Fuel + Ohers, e.g. Waer, CO2, N2...) Emsson (NO, Soo and CO) Premed mode: All Processes n HCCI mode Flame Propagaon Spark Plug(s) Ignon Non-Premed Mode: All Processes n HCCI mode Sngle and Mul-Injecon Models (neracons among plo, man and posnjecons) Ineracons beween flow/urbulence/mng and gnon/combuson Med-Type Mode: All Processes n HCCI, Premed and non-premed modes Model mul-mode combuson smulaon a same locaon nsananeously 32

33 Resul-2: Naural Gas Engne Parameers and Mesh Arrangemen Ignon Mode SI MP Bore/soke/rod lengh 250/250/500mm Engne speed Premed fuel EQ and EGR Conc. Asssan fuel n prechamber Sweep Volume NG 750rpm /0.1 Desel 12.3lers Pre-chamber volume % 1.5% Asssan fuel njecon masses Asssan fuel njecon mngs 4.35mg 3.03mg CA 33

34 Resul-2: Naural Gas Engne Fuels, Prog. Varable, Flame Fron, Temp.,Turbulence, Velocy Con. 34

35 Resul-2: Naural Gas Engne Mean Pressure, Temperaure and Progress Varable Con. 35

36 HPDI Technology Naural gas as prmary fuel, along wh a small amoun of Desel as a plo gnon source lqud spark plug One njecor for boh fuels Pcure source: hp://

37 Demo case engne echncal daa Arfcal gas engne for demo purpose Bore 130 Sroke 150 Conrod 260 Compresson rao 18 Case condon Engne speed 1500 rev/mn AFR-NG 30.3, AFR-Desel 273 EGR 2.5% Fuel njecon SOI Desel 707 o CA, Duraon 3 o SOI Gas 711 o CA, duraon 16 o

38 Pressure (Pa) Temperaure (K) Resuls Cylnder pressure and emperaure 2.0E E E E E E E E E E+06 Pressure Temperaure 1,800 1,600 1,400 1,200 1, E Crankangle (deg) 0

39 Hea release rae (J/sec) Resuls Hea release rae 2.0E E E E E E E E E E E Crankangle (deg)

40 Resuls Feld dsrbuon NG Desel PV T 712o CA 710o CA 708o CA 711.5o CA

41 Resuls Feld dsrbuon NG Desel PV T 720o CA 715o CA 713o CA 717o CA

42 Resuls Feld dsrbuon NG Desel PV T 760o CA 729o CA 724o CA 736o CA

43 Conens Inroducon Approach Resuls Conclusons 43

44 Conclusons 1. PVM-MF has been developed. Is man feaures are Dealed chemsry based Capable of dfferen and med- ypes mode of combuson Capable of mul-fuel operaon Low compuaonal cos 2. Chemsry soluons sored n PVM-lbrary. Couple CFD/chemsry soluons hrough progress varable 3. PVM-MF saves compuaonal cos n wo ways: Only solve Base speces/prog. Varable ranspor Eqs Pre-calculaed lbrary for Reacon/Properes 4. Pracces proves PVM-MF works n prmary ess/valdaons 44

45 Thank You! 45