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AirCycles4Recips

AirCycles4Recips - Gas property inputs gamma M(kg/mole 1.3...

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Gas property inputs Intake mixture property inputs gamma M (kg/mole) f Qr Tintake (K) Pin (atm) 1.3 0.03 0.07 4.50E+07 300 1 Cycle property inputs 8.00 0 2400 TRUE 0.05 0.11 0 Calculated results (don't modify these cells!) Ind. Work (J)IMEP (atm) BMEP (atm) Mass burned Heat in (J) Cutoff ratio Exp. Ratio 599.46 11.8354 10.8354 6.14E-04 1877.95 1.3194 4.6110 Otto TRUE FALSE 0.46 Diesel FALSE FALSE 0.44 Brayton FALSE TRUE 0.46 Atkinson TRUE TRUE 0.42 Vol. comp.  ratio (r) Disp. Vol.  (m^3) Engine speed  (RPM) Quasi-const  v comb? Burn start  (fract. BTDC) Burn end  (fract. ATDC) Burn rate  profile Quasi-const  v comb? Complete  expansion? Ideal  efficiency 0.E+00 1.E-04 2.E-04 3.E-04 4.E-04 5.E-04 6.E-04 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 P-V diagram Com- pression Combustion Expansion Blowdown Intake Exhaust Intake start 1 1.0000 11.2597 43.2738 5.0665 1.0000 1.0000 Cylinder volume (m^3) Pressure (atm) -500 0 0 1000 2000 3000 4000 T- Com- pression Combus Intake Exhaust 334.1347 608.920 1146.2509 980.449 En Temperature (K)
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Pexh (atm) Exhaust residual? 1 TRUE <- if TRUE, press SOLVE button to update solution Wall temp FMEP (atm) FALSE 0.9 0.9 400 0.01 1 Brake Eff Ideal eff Power (hp) Tmax (K) Texh (K) Tmax, endgas (K) 0.2922 0.4641 14.7171 3087.7 1017.6 792.8 Complete  expansion? on  Efficiency Expansion  efficiency Heat xfer  coefficient 500 1000 1500 2000 -s diagram stion Expansion Blowdown t Close T-s  cycle 1017.6395 05 3087.6818 1666.8795 99 ntropy (J/kg-K) SOLVE
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Some volume
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9.393E-05 9.071E-05 8.750E-05 8.429E-05 8.107E-05 7.786E-05 7.464E-05 7.143E-05 6.821E-05 6.500E-05 6.179E-05 5.857E-05 5.536E-05 5.214E-05 4.893E-05 4.571E-05 4.250E-05 3.929E-05 3.607E-05 3.286E-05 2.964E-05 2.643E-05 2.321E-05 2.000E-05 1.679E-05 1.357E-05
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e calculations… T (end gas) (a T (end gas) after loss
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4.672E-05 4.672E-05 608.9205 606.8313 •  The end gas calculation assumes that a small portion 4.981E-05 1.134E-04 640.5728 638.1671    of the total mixture has no heat added to it but underg 5.290E-05 1.059E-04 668.7879 666.1001    reversible compression/expansion according due to th 5.599E-05 9.978E-05 694.5454 691.5999    increase/decrease of the rest of the gas in the cylinde 5.908E-05 9.442E-05 718.4976 715.3126    that DOES have heat input due to combustion 6.216E-05 8.956E-05 741.1107 737.6996 •  Of course the end gas undergoes heat loss according 6.525E-05 8.506E-05 762.7383 759.1109    the usual formula 6.834E-05 8.080E-05 783.6631 779.8265 7.143E-05 7.673E-05 792.8130 788.8849 7.452E-05 7.631E-05 790.6519 786.7454 7.761E-05 7.932E-05 788.2469 784.3645 8.069E-05 8.233E-05 785.6392 781.7828 8.378E-05 8.535E-05 782.8625 779.0339 8.687E-05 8.837E-05 779.9449 776.1455 8.996E-05 9.140E-05 776.9098 773.1407 9.305E-05 9.444E-05 773.7770 770.0392 9.613E-05 9.747E-05 770.5630 766.8574 9.922E-05 1.005E-04 767.2821 763.6093 1.023E-04 1.036E-04 763.9464 760.3069 1.054E-04 1.066E-04 760.5664 756.9607 1.085E-04 1.097E-04 757.1510 753.5795 1.116E-04 1.127E-04 753.7080 750.1709 1.147E-04 1.158E-04 750.2443 746.7418 1.178E-04 1.188E-04 746.7656 743.2980 1.208E-04 1.219E-04 743.2772 739.8445 1.239E-04 1.249E-04 739.7837 736.3859
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n goes he pressure er g to
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R (j/kgK) Cv v1 (m^3/kg) T exh res 286.69 955.63 0.85 1017.64 Intake P (atm) T (adia) T (after xfer) v (m^3/kg) mass (kg) V (m^3) s-so (J/kg-K) 1 1017.6395 1011.4631 2.8800 2.48E-05 7.143E-05 1517.4446 1 664.8909 662.2420 1.8817 4.84E-05 9.143E-05 988.6900 1 543.5852 542.1494 1.5384 7.19E-05 1.114E-04 738.4412 1 482.4016 481.5775 1.3652 9.55E-05 1.314E-04 590.0959 1 445.6419 445.1855 1.2612 1.19E-04 1.514E-04 491.6281 1 421.1992 420.9872 1.1920 1.43E-04 1.714E-04 421.5490 1 403.8329 403.7945 1.1429 1.66E-04 1.914E-04 369.2412 1 390.9054 390.9963 1.1063 1.90E-04 2.114E-04 328.8216 1 380.9447 381.1352 1.0781 2.13E-04 2.314E-04 296.7555 1 373.0644 373.3337 1.0558 2.37E-04 2.514E-04 270.7870 1 366.6989 367.0319 1.0378 2.60E-04 2.714E-04 249.4068 1 361.4704 361.8557 1.0230 2.84E-04 2.914E-04 231.5659 1 357.1168 357.5457 1.0107 3.07E-04 3.114E-04 216.5125 1 353.4507 353.9162 1.0003 3.31E-04 3.314E-04 203.6931 1 350.3344 350.8311 0.9915 3.55E-04 3.514E-04 192.6912 1 347.6646 348.1880 0.9839 3.78E-04 3.714E-04 183.1875 1 345.3622 345.9085 0.9774 4.02E-04 3.914E-04 174.9327 1 343.3655 343.9319 0.9718 4.25E-04 4.114E-04 167.7297 1 341.6261 342.2098 0.9668 4.49E-04 4.314E-04 161.4203 1 340.1049 340.7038 0.9625 4.72E-04 4.514E-04 155.8761 1 338.7704 339.3827 0.9588 4.96E-04 4.714E-04 150.9921 1 337.5969 338.2209 0.9554 5.19E-04 4.914E-04 146.6811 1 336.5630 337.1973 0.9525 5.43E-04 5.114E-04 142.8704 1 335.6508 336.2943 0.9499 5.67E-04 5.314E-04 139.4991 1 334.8456 335.4972 0.9476 5.90E-04 5.514E-04 136.5152 1 334.1347 0.9456 6.14E-04 5.714E-04 133.8746 Compression P (atm) T (adia) (K)
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