AirCycles4Recips

AirCycles4Recips - Gas property inputs gamma M(kg/mole 1.3 0.029 Cycle property inputs Intake mixture property inputs f Qr Tintake(K 0.068 4 Burn

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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 burnedHeat 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 Exhaus 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 st 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) (aT (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
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This note was uploaded on 07/22/2008 for the course AME 436 taught by Professor Ronney during the Spring '08 term at USC.

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AirCycles4Recips - Gas property inputs gamma M(kg/mole 1.3 0.029 Cycle property inputs Intake mixture property inputs f Qr Tintake(K 0.068 4 Burn

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