TALK=T;RUN(1,1) DISPLAY The case considered is the zero-swirl gas-fired axisymmetric combustion chamber used in the experiments of Owen et al ( 16th Int. Symp. on Combustion, p105-117, 1976). The geometry comprises a 0.122m diameter tube into which natural gas (96%CH4) is injected at 288K axially to mix and burn with a coaxial annular air stream at 750K. The inlet air/fuel equivalence ratio is 0.9, and the combustor operating pressure is 3.8 atm. The length of the solution domain is taken as 4 furnace diameters. Calculations are made with one of 4 different combustion models: (a) fast-chemistry model with a 1-step global irreversible methane reaction to form CO2 and H2O; (b) as (a) but with an assumed double-delta pdf to account for the influence of concentration fluctuations; (c) eddy-break-up finite-rate chemistry model with a 1-step global irreversible reaction; and (d) as (c) but with a 2-step global reaction mechanism involving the intermediate CO. Radiative heat transfer is modelled via the P1 spherical-harmonics approximation for a gray medium. ENDDIS ************************************************************ Group 1. Run Title and Number ************************************************************ ************************************************************ TEXT(Owen Furnace CH4 Diffusion Flame ) ************************************************************ ************************************************************ IRUNN = 1 ;LIBREF = 302 ************************************************************ Group 2. Time dependence STEADY = T ************************************************************ Group 3. X-Direction Grid Spacing CARTES = F NX = 1 XULAST =0.1 XFRAC(1)=1. ************************************************************ Group 4. Y-Direction Grid Spacing NY = 30 YVLAST =0.061 YFRAC(1)=0.051639 ;YFRAC(2)=0.103279 YFRAC(3)=0.154918 ;YFRAC(4)=0.206557 YFRAC(5)=0.258197 ;YFRAC(6)=0.309836 YFRAC(7)=0.361475 ;YFRAC(8)=0.413115 YFRAC(9)=0.464754 ;YFRAC(10)=0.516393 YFRAC(11)=0.542623 ;YFRAC(12)=0.568852 YFRAC(13)=0.595082 ;YFRAC(14)=0.621311 YFRAC(15)=0.647541 ;YFRAC(16)=0.67377 YFRAC(17)=0.7 ;YFRAC(18)=0.726229 YFRAC(19)=0.752459 ;YFRAC(20)=0.778688 YFRAC(21)=0.80082 ;YFRAC(22)=0.822951 YFRAC(23)=0.845082 ;YFRAC(24)=0.867213 YFRAC(25)=0.889344 ;YFRAC(26)=0.911475 YFRAC(27)=0.933607 ;YFRAC(28)=0.955738 YFRAC(29)=0.977869 ;YFRAC(30)=1. ************************************************************ Group 5. Z-Direction Grid Spacing PARAB = F NZ = 40 ZWLAST =0.5 ZFRAC(1)=5.716314E-03 ;ZFRAC(2)=0.015085 ZFRAC(3)=0.026613 ;ZFRAC(4)=0.039811 ZFRAC(5)=0.054409 ;ZFRAC(6)=0.070231 ZFRAC(7)=0.087147 ;ZFRAC(8)=0.105061 ZFRAC(9)=0.123895 ;ZFRAC(10)=0.143587 ZFRAC(11)=0.164084 ;ZFRAC(12)=0.18534 ZFRAC(13)=0.207318 ;ZFRAC(14)=0.229983 ZFRAC(15)=0.253305 ;ZFRAC(16)=0.277258 ZFRAC(17)=0.301818 ;ZFRAC(18)=0.326962 ZFRAC(19)=0.352672 ;ZFRAC(20)=0.378929 ZFRAC(21)=0.405717 ;ZFRAC(22)=0.43302 ZFRAC(23)=0.460824 ;ZFRAC(24)=0.489116 ZFRAC(25)=0.517883 ;ZFRAC(26)=0.547115 ZFRAC(27)=0.5768 ;ZFRAC(28)=0.606928 ZFRAC(29)=0.63749 ;ZFRAC(30)=0.668476 ZFRAC(31)=0.699878 ;ZFRAC(32)=0.731688 ZFRAC(33)=0.763898 ;ZFRAC(34)=0.796501 ZFRAC(35)=0.82949 ;ZFRAC(36)=0.862858 ZFRAC(37)=0.896599 ;ZFRAC(38)=0.930707 ZFRAC(39)=0.965176 ;ZFRAC(40)=1. ************************************************************ Group 6. Body-Fitted Coordinates ************************************************************ Group 7. Variables: STOREd,SOLVEd,NAMEd ONEPHS = T NAME(1)=P1 ;NAME(5)=V1 NAME(7)=W1 ;NAME(12)=KE NAME(13)=EP ;NAME(14)=H1 NAME(16)=CH4 ;NAME(17)=O2 NAME(18)=H2 ;NAME(19)=CO NAME(20)=H2O ;NAME(21)=CO2 NAME(22)=N2 ;NAME(140)=EPKE NAME(141)=SRAD ;NAME(142)=MCO2 NAME(143)=MCO ;NAME(144)=MMWT NAME(145)=P1RS ;NAME(146)=SPH1 NAME(147)=F ;NAME(148)=TMP1 NAME(149)=DEN1 ;NAME(150)=VIST * Y in SOLUTN argument list denotes: * 1-stored 2-solved 3-whole-field * 4-point-by-point 5-explicit 6-harmonic averaging SOLUTN(P1,Y,Y,Y,N,N,Y) SOLUTN(V1,Y,Y,N,N,N,N) SOLUTN(W1,Y,Y,N,N,N,N) SOLUTN(KE,Y,Y,N,N,N,N) SOLUTN(EP,Y,Y,N,N,N,N) SOLUTN(H1,Y,N,N,N,N,Y) SOLUTN(CH4,Y,Y,N,N,N,N) SOLUTN(O2,Y,N,N,N,N,N) SOLUTN(H2,Y,N,N,N,N,N) SOLUTN(CO,Y,N,N,N,N,N) SOLUTN(H2O,Y,N,N,N,N,N) SOLUTN(CO2,Y,N,N,N,N,N) SOLUTN(N2,Y,N,N,N,N,N) SOLUTN(EPKE,Y,N,N,N,N,N) SOLUTN(SRAD,Y,N,N,N,N,Y) SOLUTN(MCO2,Y,N,N,N,N,Y) SOLUTN(MCO,Y,N,N,N,N,Y) SOLUTN(MMWT,Y,N,N,N,N,Y) SOLUTN(P1RS,Y,N,N,N,N,Y) SOLUTN(SPH1,Y,N,N,N,N,N) SOLUTN(F,Y,Y,Y,N,N,Y) SOLUTN(TMP1,Y,N,N,N,N,Y) SOLUTN(DEN1,Y,N,N,N,N,Y) SOLUTN(VIST,Y,N,N,N,N,Y) DEN1 = 149 VIST = 150 TEMP1 = 148 ************************************************************ Group 8. Terms & Devices * Y in TERMS argument list denotes: * 1-built-in source 2-convection 3-diffusion 4-transient * 5-first phase variable 6-interphase transport TERMS(P1,Y,Y,Y,N,Y,Y) TERMS(V1,Y,Y,Y,Y,Y,Y) TERMS(W1,Y,Y,Y,Y,Y,Y) TERMS(KE,N,Y,Y,Y,Y,N) TERMS(EP,N,Y,Y,Y,Y,N) TERMS(CH4,N,Y,Y,Y,Y,Y) TERMS(F,N,Y,Y,Y,N,Y) DIFCUT =0.5 ;ZDIFAC =1. GALA = F ;ADDDIF = F NEWRH1 = T NEWENT = T ISOLX = -1 ;ISOLY = -1 ;ISOLZ = -1 DENPCO = T ************************************************************ Group 9. Properties used if PRPS is not stored, and where PRPS = -1.0 if it is! RHO1 = GRND9 ;TMP1 = GRND9 ;EL1 = GRND4 TSURR =0. ;TEMP0 =0. ;PRESS0 =3.85035E+05 DVO1DT =0. ;DRH1DP =0. RHO1A = GRND9 ;RHO1B =0. ;RHO1C =0. TMP1A =0. ;TMP1B =0. ;TMP1C =0. TMP2A =0. ;TMP2B =0. ;TMP2C =0. EMISS =0. ;SCATT =0. RADIA =0. ;RADIB =0. EL1A =0. ;EL1B =0. ;EL1C =0. ENUL =4.2E-05 ;ENUT = GRND3 ENUTA =0. ;ENUTB =0. ;ENUTC =0. IENUTA = 0 PRNDTL(V1)=1. ;PRNDTL(W1)=1. PRNDTL(KE)=1. ;PRNDTL(EP)=1. PRNDTL(CH4)=1. ;PRNDTL(F)=1. PRT(V1)=1. ;PRT(W1)=1. PRT(KE)=1. ;PRT(EP)=1.314 PRT(CH4)=1. ;PRT(F)=1. CP1 = GRND7 ;CP2 =1. CP1A =0. ;CP1B =0. ;CP1C =0. ;CP1D =0. ************************************************************ Group 10.Inter-Phase Transfer Processes ************************************************************ Group 11.Initial field variables (PHIs) FIINIT(P1)=1.0E-10 ;FIINIT(V1)=1.0E-10 FIINIT(W1)=19.604807 ;FIINIT(KE)=8.64784 FIINIT(EP)=684.966309 ;FIINIT(H1)=4.724E+05 FIINIT(CH4)=1.0E-10 ;FIINIT(O2)=1.0E-10 FIINIT(H2)=1.0E-10 ;FIINIT(CO)=1.0E-10 FIINIT(H2O)=1.0E-10 ;FIINIT(CO2)=1.0E-10 FIINIT(N2)=1.0E-10 ;FIINIT(EPKE)=1.0E-10 FIINIT(SRAD)=1.0E-10 ;FIINIT(MCO2)=1.0E-10 FIINIT(MCO)=1.0E-10 ;FIINIT(MMWT)=1.0E-10 FIINIT(P1RS)=1.0E-10 ;FIINIT(SPH1)=1.0E-10 FIINIT(F)=0. ;FIINIT(TMP1)=750. FIINIT(DEN1)=1.759791 ;FIINIT(VIST)=1.0E-10 No PATCHes yet used for this Group INIADD = F FSWEEP = 1 NAMFI =CHAM ************************************************************ Group 12. Patchwise adjustment of terms Patches for this group are printed with those for Group 13. Their names begin either with GP12 or & ************************************************************ Group 13. Boundary & Special Sources PATCH(KESOURCE,PHASEM, 0, 0, 0, 0, 0, 0, 1, 1) COVAL(KESOURCE,KE , GRND4 , GRND4 ) COVAL(KESOURCE,EP , GRND4 , GRND4 ) PATCH(SCRSPRSO,PHASEM, 0, 0, 0, 0, 0, 0, 1, 1) COVAL(SCRSPRSO,CH4 , GRND2 , GRND2 ) PATCH(SCRSF ,LOW , 1, 1, 1, 10, 1, 1, 1, 1) COVAL(SCRSF ,P1 , FIXFLU , GRND1 ) COVAL(SCRSF ,V1 ,0. ,0. ) COVAL(SCRSF ,W1 ,0. ,0.906197 ) COVAL(SCRSF ,KE ,0. ,0.032848 ) COVAL(SCRSF ,EP ,0. ,0.310516 ) COVAL(SCRSF ,CH4 ,0. ,1. ) COVAL(SCRSF ,F ,0. ,1. ) PATCH(SCRSO ,LOW , 1, 1, 11, 20, 1, 1, 1, 1) COVAL(SCRSO ,P1 , FIXFLU , GRND1 ) COVAL(SCRSO ,V1 ,0. ,0. ) COVAL(SCRSO ,W1 ,0. ,19.604807 ) COVAL(SCRSO ,KE ,0. ,15.373939 ) COVAL(SCRSO ,EP ,0. ,6190.065918 ) COVAL(SCRSO ,CH4 ,0. ,0. ) COVAL(SCRSO ,F ,0. ,0. ) PATCH(OUT ,HIGH , 1, 1, 1, 30, 40, 40, 1, 1) COVAL(OUT ,P1 ,100. ,0. ) COVAL(OUT ,F ,0. , SAME ) PATCH(NWALL3 ,NWALL , 1, 1, 30, 30, 1, 40, 1, 1) COVAL(NWALL3 ,W1 , GRND2 ,0. ) COVAL(NWALL3 ,KE , GRND2 , GRND2 ) COVAL(NWALL3 ,EP , GRND2 , GRND2 ) XCYCLE = F EGWF = T WALLCO = GRND2 ************************************************************ Group 14. Downstream Pressure For PARAB ************************************************************ Group 15. Terminate Sweeps LSWEEP = 600 ;ISWC1 = 1 LITHYD = 1 ;LITFLX = 1 ;LITC = 1 ;ITHC1 = 1 SELREF = T RESFAC =1.0E-05 ************************************************************ Group 16. Terminate Iterations LITER(P1)=20 ;LITER(V1)=10 LITER(W1)=10 ;LITER(KE)=20 LITER(EP)=20 ;LITER(CH4)=20 LITER(F)=20 ENDIT(P1)=1.0E-03 ;ENDIT(V1)=1.0E-03 ENDIT(W1)=1.0E-03 ;ENDIT(KE)=1.0E-03 ENDIT(EP)=1.0E-03 ;ENDIT(CH4)=1.0E-03 ENDIT(F)=1.0E-03 ************************************************************ Group 17. Relaxation RELAX(P1,LINRLX,0.5) RELAX(V1,FALSDT,6.375987E-04) RELAX(W1,FALSDT,6.375987E-04) RELAX(KE,LINRLX,0.5) RELAX(EP,LINRLX,0.5) RELAX(H1,LINRLX,1.) RELAX(CH4,FALSDT,3.187994E-04) RELAX(O2,LINRLX,1.) RELAX(H2,LINRLX,1.) RELAX(CO,LINRLX,1.) RELAX(H2O,LINRLX,1.) RELAX(CO2,LINRLX,1.) RELAX(N2,LINRLX,1.) RELAX(EPKE,LINRLX,1.) RELAX(SRAD,LINRLX,1.) RELAX(MCO2,LINRLX,1.) RELAX(MCO,LINRLX,1.) RELAX(MMWT,LINRLX,1.) RELAX(P1RS,LINRLX,1.) RELAX(SPH1,LINRLX,1.) RELAX(F,LINRLX,0.5) RELAX(TMP1,LINRLX,1.) RELAX(DEN1,LINRLX,1.0E-02) RELAX(VIST,LINRLX,1.) KELIN = 3 OVRRLX =0. EXPERT = F ;NNORSL = F ************************************************************ Group 18. Limits VARMAX(P1)=1.0E+10 ;VARMIN(P1)=-1.0E+10 VARMAX(V1)=1.0E+06 ;VARMIN(V1)=-1.0E+06 VARMAX(W1)=1.0E+06 ;VARMIN(W1)=-1.0E+06 VARMAX(KE)=1.0E+10 ;VARMIN(KE)=1.0E-10 VARMAX(EP)=1.0E+10 ;VARMIN(EP)=1.0E-10 VARMAX(H1)=1.0E+10 ;VARMIN(H1)=-1.0E+10 VARMAX(CH4)=1. ;VARMIN(CH4)=0. VARMAX(O2)=1. ;VARMIN(O2)=0. VARMAX(H2)=1. ;VARMIN(H2)=0. VARMAX(CO)=1. ;VARMIN(CO)=0. VARMAX(H2O)=1. ;VARMIN(H2O)=0. VARMAX(CO2)=1. ;VARMIN(CO2)=0. VARMAX(N2)=1. ;VARMIN(N2)=0. VARMAX(EPKE)=1.0E+10 ;VARMIN(EPKE)=-1.0E+10 VARMAX(SRAD)=1.0E+10 ;VARMIN(SRAD)=-1.0E+10 VARMAX(MCO2)=1.0E+10 ;VARMIN(MCO2)=-1.0E+10 VARMAX(MCO)=1.0E+10 ;VARMIN(MCO)=-1.0E+10 VARMAX(MMWT)=1.0E+10 ;VARMIN(MMWT)=-1.0E+10 VARMAX(P1RS)=1.0E+10 ;VARMIN(P1RS)=-1.0E+10 VARMAX(SPH1)=1.0E+10 ;VARMIN(SPH1)=-1.0E+10 VARMAX(F)=1. ;VARMIN(F)=1.0E-10 VARMAX(TMP1)=1.0E+10 ;VARMIN(TMP1)=-1.0E+10 VARMAX(DEN1)=1.0E+10 ;VARMIN(DEN1)=1.0E-10 VARMAX(VIST)=1.0E+10 ;VARMIN(VIST)=-1.0E+10 ************************************************************ Group 19. Data transmitted to GROUND GENK = T PARSOL = F ISG62 = 1 CHSOB =16. CSG4 ='sch4' SPEDAT(SET,SCRS,IREACT,I,2) SPEDAT(SET,SCRS,NRSYS,I,-2) SPEDAT(SET,SCRS,NREAC,I,1) SPEDAT(SET,SCRS,NELEM,I,4) SPEDAT(SET,SCRS,IPDF,I,0) SPEDAT(SET,SCRS,CEBP,R,6.) SPEDAT(SET,SCRS,CEBS1,R,4.) SPEDAT(SET,SCRS,CEBS2,R,4.) SPEDAT(SET,SCRS,IFULIN,I,1) SPEDAT(SET,SCRS,IPRMOD,I,0) SPEDAT(SET,SCRS,ISRMOD,I,0) SPEDAT(SET,SCRS,IPCHEM,I,0) SPEDAT(SET,SCRS,ISCHEM,I,0) SPEDAT(SET,SCRS,PREXP,R,1.585E+13) SPEDAT(SET,SCRS,FUEXP,R,0.7) SPEDAT(SET,SCRS,OXEXP,R,0.8) SPEDAT(SET,SCRS,EACTP,R,4.8E+04) SPEDAT(SET,SCRS,PREXS1,R,3.98E+14) SPEDAT(SET,SCRS,FUEXS1,R,1.) SPEDAT(SET,SCRS,OXEXS1,R,0.25) SPEDAT(SET,SCRS,EACTS1,R,4.0E+04) SPEDAT(SET,SCRS,PREXS2,R,0.) SPEDAT(SET,SCRS,FUEXS2,R,1.) SPEDAT(SET,SCRS,OXEXS2,R,1.) SPEDAT(SET,SCRS,EACTS2,R,0.) SPEDAT(SET,SCRS,NSPEC,I,7) SPEDAT(SET,SCRS,CFUEL,C,CH4) SPEDAT(SET,SCRS,COXID,C,O2) SPEDAT(SET,SCRS,CFP1,C,CO2) SPEDAT(SET,SCRS,CFP2,C,H2O) SPEDAT(SET,CHEM,SIUNIT,L,T) SPEDAT(SET,SCRS,YFU1,R,1.) SPEDAT(SET,SCRS,YFU2,R,0.) SPEDAT(SET,SCRS,YFU3,R,0.) SPEDAT(SET,SCRS,YFU4,R,0.) SPEDAT(SET,SCRS,YFU5,R,0.) SPEDAT(SET,SCRS,YFU6,R,0.) SPEDAT(SET,SCRS,YFU7,R,0.) SPEDAT(SET,SCRS,TEMPFU,R,288.) SPEDAT(SET,SCRS,YOX1,R,0.) SPEDAT(SET,SCRS,YOX2,R,0.232) SPEDAT(SET,SCRS,YOX3,R,0.) SPEDAT(SET,SCRS,YOX4,R,0.) SPEDAT(SET,SCRS,YOX5,R,0.) SPEDAT(SET,SCRS,YOX6,R,0.) SPEDAT(SET,SCRS,YOX7,R,0.768) SPEDAT(SET,SCRS,TEMPOX,R,750.) SPEDAT(SET,PRINT,NUMBER,I,10) SPEDAT(SET,PRINT,COMMAND1,C,AVE_DEN1) SPEDAT(SET,PRINT,COMMAND2,C,AVE_P1) SPEDAT(SET,PRINT,COMMAND3,C,AVE_TMP1) SPEDAT(SET,PRINT,COMMAND4,C,AVE_F) SPEDAT(SET,PRINT,COMMAND5,C,AVE_V1) SPEDAT(SET,PRINT,COMMAND6,C,AVE_W1) SPEDAT(SET,PRINT,COMMAND7,C,AVE_EP) SPEDAT(SET,PRINT,COMMAND8,C,AVE_KE) SPEDAT(SET,PRINT,COMMAND9,C,AVE_VIST) SPEDAT(SET,PRINT,COMMAND10,C,AVE_H1) SPEDAT(SET,GXMONI,PLOTALL,L,T) ************************************************************ Group 20. Preliminary Printout ************************************************************ Group 21. Print-out of Variables INIFLD = F ;SUBWGR = F * Y in OUTPUT argument list denotes: * 1-field 2-correction-eq. monitor 3-selective dumping * 4-whole-field residual 5-spot-value table 6-residual table OUTPUT(P1,Y,N,Y,Y,Y,Y) OUTPUT(V1,Y,N,Y,Y,Y,Y) OUTPUT(W1,Y,N,Y,Y,Y,Y) OUTPUT(KE,Y,N,Y,Y,Y,Y) OUTPUT(EP,Y,N,Y,Y,Y,Y) OUTPUT(H1,Y,N,Y,N,N,N) OUTPUT(CH4,Y,N,Y,Y,Y,Y) OUTPUT(O2,Y,N,Y,Y,N,N) OUTPUT(H2,Y,N,Y,Y,N,N) OUTPUT(CO,Y,N,Y,Y,N,N) OUTPUT(H2O,Y,N,Y,Y,N,N) OUTPUT(CO2,Y,N,Y,Y,N,N) OUTPUT(N2,Y,N,Y,Y,N,N) OUTPUT(EPKE,Y,N,Y,N,N,N) OUTPUT(SRAD,Y,N,Y,N,N,N) OUTPUT(MCO2,Y,N,Y,N,N,N) OUTPUT(MCO,Y,N,Y,N,N,N) OUTPUT(MMWT,Y,N,Y,N,N,N) OUTPUT(P1RS,Y,N,Y,N,N,N) OUTPUT(SPH1,Y,N,Y,N,N,N) OUTPUT(F,Y,N,Y,Y,Y,Y) OUTPUT(TMP1,Y,N,Y,N,Y,Y) OUTPUT(DEN1,Y,N,Y,N,Y,Y) OUTPUT(VIST,Y,N,Y,N,N,N) ************************************************************ Group 22. Monitor Print-Out IXMON = 1 ;IYMON = 2 ;IZMON = 6 NPRMON = 100000 ;NPRMNT = 1 ;TSTSWP = -1 UWATCH = T ;USTEER = T HIGHLO = F ************************************************************ Group 23.Field Print-Out & Plot Control NPRINT = 100000 ;NUMCLS = 5 NYPRIN = -1 ;IYPRF = 1 ;IYPRL = 10000 NZPRIN = -1 ;IZPRF = 1 ;IZPRL = 10000 XZPR = F ;YZPR = F IPLTF = 1 ;IPLTL = -1 ;NPLT = -1 ISWPRF = 1 ;ISWPRL = 100000 ITABL = 3 ;IPROF = 1 ABSIZ =0.5 ;ORSIZ =0.4 NTZPRF = 1 ;NCOLPF = 50 ICHR = 2 ;NCOLCO = 45 ;NROWCO = 20 No PATCHes yet used for this Group ************************************************************ Group 24. Dumps For Restarts SAVE = T ;NOWIPE = F NSAVE =CHAM STOP