Propellants¶
The table below displays the propellants built in to RocketCEA. Click any of the names to see the card deck submitted to CEA for that propellant.
If your propellant is not included, or if you disagree with the definitions, new propellants can be added, and existing propellants can be modified.
Any use of RocketCEA begins with an import statement and an instance of CEA_Obj:
from rocketcea.cea_obj import CEA_Obj
C = CEA_Obj( oxName='N2O4', fuelName='MMH')
Bipropellant runs use oxName and fuelName to define propellants. For Monopropellants and Solid Propellants, the instance of CEA_Obj uses propName:
from rocketcea.cea_obj import CEA_Obj
C = CEA_Obj( propName='HYD40')
Click Propellant Name to View Definition
Special Blends¶
There are a number of special blends that can be created when making an instance of CEA_Obj.
Hydrazine Monopropellant¶
The performance of Hydrazine Monopropellant engines is driven by the amount of ammonia dissociation that the catalyst bed delivers. Any amount of ammonia dissociation can be run by calling out the propName as “HYD” + weight percent dissociation.
Note that the CEA FORTRAN code has been modified to include “Undissociated Ammonia (UA)” as an exhaust product. The CEA input also includes an “omit NH3” statement to prevent normal NH3 calculations.
The examples below call out 30, 40 and 50 percent ammonia dissociation.:
C = CEA_Obj( propName='HYD30')
C = CEA_Obj( propName='HYD40')
C = CEA_Obj( propName='HYD50')
MMH + N2H4¶
Mixtures of MMH and N2H4 are often used to suppress the freezing point of N2H4. M20 is a common mixture (20% MMH + 80% N2H4 by weight). The examples below call out 10, 20 and 30 percent MMH:
C = CEA_Obj( oxName='N2O4', fuelName='M10')
C = CEA_Obj( oxName='N2O4', fuelName='M20')
C = CEA_Obj( oxName='N2O4', fuelName='M30')
Mixed Oxides of Nitrogen¶
Mixtures of N2O4 and NO are often used to suppress the freezing point of N2O4. MON25 is a common mixture (25% NO + 75% N2O4 by weight).
When NO is added to N2O4, there are two main equilibrium reactions:
N2O4 <==> 2 NO2
NO + NO2 <==> N2O3
For this reason, the input cards for MON oxidizers include N2O4 and N2O3. The weight percentages are calculated based on the equilibrium equations above.
The examples below call out MON oxidizers with 15, 20 and 25 percent NO:
C = CEA_Obj( oxName='MON15', fuelName='MMH')
C = CEA_Obj( oxName='MON20', fuelName='MMH')
C = CEA_Obj( oxName='MON25', fuelName='MMH')
Peroxide + Water¶
Peroxide is often blended with water in order to enhance its stability and improve its safety. While the debate about an appropriate blend of Peroxide rages on, analyzing it with RocketCEA simply requires calling it out as “Peroxide” + weight percent Peroxide. The examples below call out 90, 95 and 98 percent Peroxide:
C = CEA_Obj( propName='Peroxide90')
C = CEA_Obj( propName='Peroxide95')
C = CEA_Obj( propName='Peroxide98')
C = CEA_Obj( oxName='Peroxide98', fuelName="MMH")
FLOX¶
FLOX is a mixture of Fluorine and Oxygen. Call out the mixture as “FLOX” + weight percent of Fluorine. The examples below call out 60, 70 and 80 percent Fluorine:
C = CEA_Obj( oxName='FLOX60', fuelName="LH2")
C = CEA_Obj( oxName='FLOX70', fuelName="LH2")
C = CEA_Obj( oxName='FLOX80', fuelName="LH2")
Oxidizers¶
90_H2O2¶
oxid H2O2(L) H 2 O 2 wt%=90.00
h,cal=-44880.0 t(k)=298.15 rho.g/cc=1.407
oxid = WATER H 2.0 O 1.0 wt%= 10.0
h,cal=-68317. t(k)=298.15 rho.g/cc=1.0
98_H2O2¶
oxid H2O2(L) H 2 O 2 wt%=98.00
h,cal=-44880.0 t(k)=298.15 rho.g/cc=1.407
oxid = WATER H 2.0 O 1.0 wt%= 2.0
h,cal=-68317. t(k)=298.15 rho.g/cc=1.0
AIR¶
oxid Air wt%=100.00
h,cal=-28.2 t(k)=298.15
AIRSIMP¶
oxid AIRSIMP N 1.5622 O .4192 Ar .0093
h,cal=0. t(k)=298.15
CLF3¶
oxid CLF3(L) CL 1 F 3 wt%=100.00
h,cal=-45680.0 t(k)=298.15
CLF5¶
oxid CLF5(L) CL 1 F 5 wt%=100.00
h,cal=-60500.0 t(k)=298.15
F2¶
oxid F2(L) F 2
h,cal=-3098. t(k)=82.02 wt%=100.
GO2¶
oxid O2(G) O 2
h,cal=0. t(k)=298.15 wt%=100.
GOX¶
oxid O2(G) O 2
h,cal=0. t(k)=298.15 wt%=100.
H2O¶
oxid water H 2.0 O 1.0 wt%=100.0
h,cal=-68308. t(k)=298.15 rho,g/cc = 0.9998
H2O2¶
oxid H2O2(L) H 2 O 2 wt%=100.00
h,cal=-44880.0 t(k)=298.15 rho.g/cc=1.407
HAN315¶
oxid = HAN C 0.064 H 4.296 N 2.062 O 4.1 P 0.008 wt%= 44.5
h,cal=-93980. t(k)=298.15 rho.g/cc=1.685
oxid = HEHN C 2.0 H 9.0 N 3.0 O 4.0 wt%= 44.5
h,cal=-108000. t(k)=298.15 rho.g/cc=1.428
oxid = WATER H 2.0 O 1.0 wt%= 11.0
h,cal=-68000. t(k)=298.15 rho.g/cc=1.0
HNO3¶
oxid HNO3(L) H 1 N 1 O 3 wt%=100.00
h,cal=-42460.0 t(k)=298.15 rho.g/cc=1.5027
IRFNA¶
oxid IRFNA H 1.57216 N 1.62945 O 4.69505 F 0.02499 wt%=100.00
h,cal=-64860.0 t(k)=298.15 rho.g/cc=1.48
LO2¶
oxid O2(L) O 2
h,cal=-3102. t(k)=90.18 wt%=100.
LO2_NASA¶
oxid O2(L) O 2
h,cal=-3102.055 t(k)=90.17 wt%=100.
LOX¶
oxid O2(L) O 2
h,cal=-3102. t(k)=90.18 wt%=100.
MON15¶
oxid N2O4(L) N 2 O 4 wt%=62.01
h,cal=-4676.0 t(k)=298.15
oxid N2O3 N 2 O 3 wt%=37.99
h,cal=12020.7 t(k)=298.15
MON25¶
oxid N2O4(L) N 2 O 4 wt%=36.67
h,cal=-4676.0 t(k)=298.15
oxid N2O3 N 2 O 3 wt%=63.33
h,cal=12020.7 t(k)=298.15
MON3¶
oxid N2O4(L) N 2 O 4 wt%=100.00
h,cal=-4676.0 t(k)=298.15
N2F4¶
oxid N2F4(L) N 2 F 4
h,cal=-5200.0 t(k)=199.0 wt%=100.
N2H4¶
oxid N2H4(L) N 2 H 4 wt%=100.
h,cal=12100.0 t(k)=298.15 rho=1.0036
N2O¶
oxid NitrousOxide N 2.0 O 1.0 wt%=100.00
h,cal= 19467.0 t(k)=298.15
N2O3¶
oxid N2O3(L) N 2 O 3 wt%=100.00
h,cal=12020.7 t(k)=298.15
N2O4¶
oxid N2O4(L) N 2 O 4 wt%=100.00
h,cal=-4676.0 t(k)=298.15
N2O_nbp¶
oxid NitrousOxide N 2.0 O 1.0 wt%=100.00
h,cal= 14583.0 t(k)=184.4
O2¶
oxid O2(L) O 2
h,cal=-3102. t(k)=90.18 wt%=100.
OF2¶
oxid OF2(L) O 1 F 2
h,cal=2524. t(k)=167.0 wt%=100.
Peroxide90¶
oxid H2O2(L) H 2 O 2 wt%=90.00
h,cal=-44880.0 t(k)=298.15 rho.g/cc=1.407
oxid = WATER H 2.0 O 1.0 wt%= 10.0
h,cal=-68317. t(k)=298.15 rho.g/cc=1.0
Peroxide98¶
oxid H2O2(L) H 2 O 2 wt%=98.00
h,cal=-44880.0 t(k)=298.15 rho.g/cc=1.407
oxid = WATER H 2.0 O 1.0 wt%= 2.0
h,cal=-68317. t(k)=298.15 rho.g/cc=1.0
Fuels¶
A50¶
fuel C2H8N2(L),UDMH wt% 50. t(k) 298.15
h,cal=11900.0 t(k)=298.15 rho=.783
fuel N2H4(L) N 2 H 4 wt%=50.
h,cal=12100.0 t(k)=298.15 rho=1.0036
Acetylene¶
fuel Acetylene C 2 H 2 wt%=100.
h,cal=54324. t(k)=198.3 rho=0.9
AL¶
fuel Aluminum t(k)=298.15 AL 1 wt%=100.00
h,cal=0.0 t(k)=298.15
AP¶
fuel NH4CLO4(I) wt%=100.00
B2H6¶
fuel B2H6(L) B 2 H 6
h,cal=4970.0 t(k)=180.0 wt%=100.
C2H2¶
fuel Acetylene C 2 H 2 wt%=100.
h,cal=54324. t(k)=198.3 rho=0.9
C2H5OH¶
fuel C2H5OH(L) C 2 H 6 O 1
h,cal=-66370.0 t(k)=298.15 wt%=100.
C2H6¶
fuel C2H6(L) C 2 H 6 wt%=100.
h,cal=-24797.0 t(k)=184.56 rho=0.5808
C2H6_167¶
fuel C2H6(L) C 2 H 6 wt%=100.
h,cal=-25296.0 t(k)=167.0 rho=0.5808
C3H8¶
fuel C3H8(L) C 3 H 8 wt%=100.
h,cal=-30372. t(k)=231.08 rho=0.5808
CFx¶
fuel CFx C 1.0 F 1.0 wt%=100.00
h,cal=57863.0 t(k)=298.15 rho=1.8200
CH3OH¶
fuel CH3OH(L) C 1 H 4 O 1
h,cal=-57040.0 t(k)=298.15 wt%=100.
CH4¶
fuel CH4(L) C 1 H 4 wt%=100.
h,cal=-21390. t(k)=111.66 rho=0.4239
CINCH¶
fuel CINCH(L) C 4. H 10. N 4.
h,cal=66550. t(k)=298.15 wt%=100.
DMAZ¶
fuel dmaz C 4.0 H 10.0 N 4.0 wt%= 100.00
h,cal=66548. t(k)=298.15 rho,g/cc = 0.93
ECP_dimer¶
fuel ECP-dimer(L) C 10. H 10.
h,cal=123600. t(k)=298.15 wt%=100.
Ethanol¶
fuel C2H5OH(L) C 2 H 6 O 1
h,cal=-66370.0 t(k)=298.15 wt%=100.
ETHANOL¶
fuel C2H5OH(L) C 2 H 6 O 1
h,cal=-66370.0 t(k)=298.15 wt%=100.
Gasoline¶
fuel Gasoline C 8 H 18
h,cal=-49809. t(k)=298.15 rho=0.7025
GCH4¶
fuel CH4(G) C 1 H 4
h,cal=-17895.0 t(k)=298.15 wt%=100.
GH2¶
fuel H2(G) H 2
h,cal=0. t(k)=298.15 wt%=100.
GH2_160¶
fuel H2(G) H 2
h,cal=-940. t(k)=160.0 wt%=100.
H2¶
fuel H2(L) H 2
h,cal=-2154.0 t(k)=20.27 wt%=100.
H2O¶
fuel water H 2.0 O 1.0 wt%=100.0
h,cal=-68308. t(k)=298.15 rho,g/cc = 0.9998
HTPB¶
fuel R-45(HTPB FROM_RPL_DATA) C 7.3165 H 10.3360 O 0.1063 wt%=100.00
h,cal= 1200.0 t(k)=298.15 rho=0.9220
Isopropanol¶
fuel C3H8O-2propanol C 3 H 8 O 1 wt%=100.
h,cal=-65133. t(k)=298.15 rho=0.786
JetA¶
fuel Jet-A(L) C 12.0 H 23.0
h,cal=-72466.6 t(k)=298.15 rho=0.815
JP10¶
fuel JP10 C 10 H 16 wt%=100.00
h,cal=-29350. t(k)=298.15 rho=0.9318
JP4¶
fuel Kerosene C 1 H 1.9532 wt%=50.00
h,cal=-5769. t(k)=298.15 rho=0.8
fuel Gasoline C 8 H 18 wt%=50.00
h,cal=-49809. t(k)=298.15 rho=0.7025
JPX¶
fuel C2H8N2(L),UDMH wt%=60. t(k) 298.15
h,cal=11900.0 t(k)=298.15 rho=.783
fuel Kerosene C 1 H 1.9532 wt%=30.00
h,cal=-5769. t(k)=298.15 rho=0.8
fuel Gasoline C 8 H 18 wt%=30.00
h,cal=-49809. t(k)=298.15 rho=0.7025
Kerosene¶
fuel Kerosene C 1 H 1.9532
h,cal=-5769. t(k)=298.15 rho=0.8
Kerosene90_H2O10¶
fuel Kerosene C 1 H 1.9532 wt%=90.00
h,cal=-5769. t(k)=298.15 rho=0.8
fuel = WATER H 2.0 O 1.0 wt%= 10.0
h,cal=-68317. t(k)=298.15 rho.g/cc=1.0
LCH4_NASA¶
fuel CH4(L) C 1 H 4 wt%=100.
h,cal=-21327.199 t(k)=111.643 rho=0.4239
LH2¶
fuel H2(L) H 2
h,cal=-2154.0 t(k)=20.27 wt%=100.
LH2_NASA¶
fuel H2(L) H 2
h,cal=-2153.920 t(k)=20.27 wt%=100.
M20¶
fuel CH6N2(L) C 1 H 6 N 2 wt%=20.0
h,cal=12900.0 t(k)=298.15 rho=.874
fuel N2H4(L) N 2 H 4 wt%=80.0
h,cal=12100.0 t(k)=298.15 rho=1.0036
M20_NH3¶
fuel CH6N2(L) C 1 H 6 N 2 wt%=17.9
h,cal=12900.0 t(k)=298.15 rho=.874
fuel N2H4(L) N 2 H 4 wt%=71.6
h,cal=12100.0 t(k)=298.15 rho=1.0036
fuel NH3(L) N 1 H 3 wt%=10.5
h,cal=-17090. t(k)=298.15 rho=0.676
Methanol¶
fuel CH3OH(L) C 1 H 4 O 1
h,cal=-57040.0 t(k)=298.15 wt%=100.
METHANOL¶
fuel CH3OH(L) C 1 H 4 O 1
h,cal=-57040.0 t(k)=298.15 wt%=100.
MHF3¶
fuel CH6N2(L) C 1 H 6 N 2 wt%=86.0
h,cal=12900.0 t(k)=298.15 rho=.874
fuel N2H4(L) N 2 H 4 wt%=14.0
h,cal=12100.0 t(k)=298.15 rho=1.0036
MMH¶
fuel CH6N2(L) C 1 H 6 N 2 wt%=100.00
h,cal=12900.0 t(k)=298.15 rho=.874
N2H4¶
fuel N2H4(L) N 2 H 4 wt%=100.
h,cal=12100.0 t(k)=298.15 rho=1.0036
NH3¶
fuel NH3(L) N 1 H 3 wt%=100.
h,cal=-17090. t(k)=298.15 rho=0.676
NITROMETHANE¶
fuel nitroMethane C 1. H 3. N 1. O 2. wt%= 100.00
h,cal=-27030. t(k)=298.15 rho,g/cc =1.1371
Propane¶
fuel C3H8(L) C 3 H 8 wt%=100.
h,cal=-30372. t(k)=231.08 rho=0.5808
Propylene¶
fuel C3H6,propylene C 3 H 6 wt%=100.
h,cal=4776.92 t(k)=298.15 rho=0.0018
propylene¶
fuel C3H6,propylene C 3 H 6 wt%=100.
h,cal=4776.92 t(k)=298.15 rho=0.0018
RP1¶
fuel RP-1 C 1 H 1.9423
h,cal=-5430. t(k)=298.15 rho=0.773
RP1_NASA¶
fuel RP-1 C 1 H 1.95
h,cal=-5907.672 t(k)=298.15 rho=0.773
RP_1¶
fuel RP-1 C 1 H 1.9423
h,cal=-5430. t(k)=298.15 rho=0.773
UDMH¶
fuel C2H8N2(L),UDMH wt% 50. t(k) 298.15
h,cal=11900.0 t(k)=298.15 rho=.783
Monoprop & Solid¶
AMT_2091¶
name NH4NO3 H 4.9968 O 3.7476 N 2.4984 wt%=75.00
h,cal=-109019.9966 t(k)=298.15 rho=1.7250
name (NH4)2CR2O7 H 3.1733 O 2.7766 N 0.7933 CR 0.7933 wt%=2.00
h,cal=-168780. t(k)=298.15 rho=2.1500
name A-20_GENPOL C 4.5500 H 7.1000 O 2.3900 wt%=7.24
h,cal=-111000. t(k)=298.15 rho=1.0380
name METHYL_ACRYLATE C 4.6464 H 6.9696 O 2.3232 wt%=11.08
h,cal=-111300. t(k)=298.15 rho=1.2000
name POLYSTYRENE C 7.6817 H 7.6817 wt%=3.957
h,cal=8000. t(k)=298.15 rho=1.0600
name MAKP C 5.3768 H 10.7535 O 1.5362 wt%=0.40
h,cal=-134060. t(k)=298.15 rho=0.8500
name CALCIUM_PHOSPHATE P 0.6447 CA 0.9671 O 2.5790 wt%=0.50
h,cal=-300500. t(k)=298.15 rho=3.1400
name TIN_OCTOATE C 3.9497 H 7.4057 O 0.9874 PB 0.0948 CU 0.1521 wt%=0.003
h,cal=-76120. t(k)=298.15 rho=1.0000
name LECITHIN C 5.5611 H 11.1223 O 1.2692 N 0.1208 wt%=0.18
h,cal=-63010. t(k)=298.15 rho=1.0220
AP10_RDX25_HTPB¶
name NH4CLO4(I) wt%=10.0
name RDX C 1.3506 H 2.7011 O 2.7011 N 2.7011 wt%=25.00
h,cal=6610. t(k)=298.15 rho=1.8200
name R-45(HTPB FROM_RPL_DATA) C 7.3165 H 10.3360 O 0.1063 wt%=65.00
h,cal= 1200.0 t(k)=298.15 rho=0.9220
ARC311¶
name ARC311 H 3.919935 C 2.237043 N 2.300870 O 2.309573 wt%=100.00
h,cal= 3939.6 t(k)=298.15 rho=1.634
ARC448¶
name ARC448 H 3.359766 C 2.052322 N 1.932190 O 2.806300 wt%=100.00
h,cal= -36867.1 t(k)=298.15 rho=1.537
ARC452¶
name ARC452 H 3.694563 C 2.469813 N 1.041212 O 3.251794 wt%=100.00
h,cal= -67947.0 t(k)=298.15 rho=1.473
ARC457¶
name ARC457 H 4.080395 C 1.238333 N 1.677693 O 3.593891
wt%=100.00 h,cal= -80325.0 t(k)=298.15 rho=1.594
HAN269¶
name = HAN N 2.0 H 4.0 O 4.0 wt%= 69.15
h,cal=-80962. t(k)=298.15 rho,g/cc = 1.685
name = MEOH C 1.0 H 4.0 O 1.0 wt%= 15.46
h,cal=-57146. t(k)=298.15 rho,g/cc = 0.791
name = water H 2.0 O 1.0 wt%= 14.80
h,cal=-68256. t(k)=298.17 rho,g/cc=1.00
name = AN H 4.0 N 2.0 O 3.0 wt%= 0.59
h,cal=-87380. t(k)=298.17 rho,g/cc=1.725
HAN315¶
name = HAN C 0.064 H 4.296 N 2.062 O 4.1 P 0.008 wt%= 44.5
h,cal=-93980. t(k)=298.15 rho.g/cc=1.685
name = HEHN C 2.0 H 9.0 N 3.0 O 4.0 wt%= 44.5
h,cal=-108000. t(k)=298.15 rho.g/cc=1.428
name = WATER H 2.0 O 1.0 wt%= 11.0
h,cal=-68000. t(k)=298.15 rho.g/cc=1.0
HPB24¶
name = diss UA 0.6667 H 2.0000 N 1.3333 wt%= 71.46
h,cal=12094. t(k)=298.15 rho,g/cc = 1.004
name = water H 2.0 O 1.0 wt%=0.5
h,cal=-68308. t(k)=298.15 rho,g/cc = 0.9998
name = hydra H 4.0 N 2.0 wt%= 4.04
h,cal=12094. t(k)=298.15 rho,g/cc = 1.004
name = hydni N 3.000 H 5.000 O 3.000 wt%= 24.00
h,cal=-50477. t(k)=298.15 rho,g/cc = 1.647
HYD40¶
name = diss UA 0.800 H 1.600 N 1.200 wt%= 99.5
h,cal=12094. t(k)=298.15 rho,g/cc = 1.004
name = water H 2.0 O 1.0 wt%=0.5
h,cal=-68308. t(k)=298.15 rho,g/cc = 0.9998
! THIS IS 40% AMMONIA DISSOCIATION
omit NH3