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from __future__ import print_function 

#!/usr/bin/env python 

# -*- coding: ascii -*- 

 

 

from rocketcea.cea_obj import CEA_Obj as CEA_Obj_default 

from rocketcea.units import get_units_obj 

 

class CEA_Obj( object ): 

""" 

RocketCEA wraps the NASA FORTRAN CEA code to calculate Isp, cstar, and Tcomb 

 

This object wraps the English unit version of CEA_Obj to enable desired user units.  

""" 

 

def __init__(self, propName='', oxName='', fuelName='', 

useFastLookup=0, makeOutput=0, 

isp_units='sec', cstar_units='ft/sec', 

pressure_units='psia', temperature_units='degR', 

sonic_velocity_units='ft/sec', enthalpy_units='BTU/lbm', 

density_units='lbm/cuft', specific_heat_units='BTU/lbm degR', 

viscosity_units='millipoise', thermal_cond_units='mcal/cm-K-s', 

fac_CR=None, make_debug_prints=False): 

""":: 

 

#: RocketCEA wraps the NASA FORTRAN CEA code to calculate Isp, cstar, and Tcomb 

#: This object wraps the English unit version of CEA_Obj to enable desired user units. 

#: Same as CEA_Obj with standard units except, input and output units can be specified. 

#: parameter default options 

#: isp_units = 'sec', # N-s/kg, m/s, km/s 

#: cstar_units = 'ft/sec', # m/s 

#: pressure_units = 'psia', # MPa, KPa, Pa, Bar, Atm, Torr 

#: temperature_units = 'degR', # K, C, F 

#: sonic_velocity_units = 'ft/sec', # m/s 

#: enthalpy_units = 'BTU/lbm', # J/g, kJ/kg, J/kg, kcal/kg, cal/g 

#: density_units = 'lbm/cuft', # g/cc, sg, kg/m^3 

#: specific_heat_units = 'BTU/lbm degR' # kJ/kg-K, cal/g-C, J/kg-K (# note: cal/g K == BTU/lbm degR) 

#: viscosity_units = 'millipoise' # lbf-sec/sqin, lbf-sec/sqft, lbm/ft-sec, poise, centipoise 

#: thermal_cond_units = 'mcal/cm-K-s' # millical/cm-degK-sec, BTU/hr-ft-degF, BTU/s-in-degF, cal/s-cm-degC, W/cm-degC 

#: fac_CR, Contraction Ratio of finite area combustor (None=infinite) 

#: if make_debug_prints is True, print debugging info to terminal. 

""" 

 

self.isp_units = isp_units 

self.cstar_units = cstar_units 

self.pressure_units = pressure_units 

self.temperature_units = temperature_units 

self.sonic_velocity_units = sonic_velocity_units 

self.enthalpy_units = enthalpy_units 

self.density_units = density_units 

self.specific_heat_units = specific_heat_units 

self.viscosity_units = viscosity_units 

self.thermal_cond_units = thermal_cond_units 

self.fac_CR = fac_CR 

 

# Units objects for input/output (e.g. Pc and Pamb) 

self.Pc_U = get_units_obj('psia', pressure_units ) 

 

# units of output quantities 

self.isp_U = get_units_obj('sec', isp_units) 

self.cstar_U = get_units_obj('ft/sec', cstar_units) 

self.temperature_U = get_units_obj('degR', temperature_units) 

self.sonic_velocity_U = get_units_obj('ft/sec', sonic_velocity_units) 

self.enthalpy_U = get_units_obj('BTU/lbm', enthalpy_units) 

self.density_U = get_units_obj('lbm/cuft', density_units) 

self.specific_heat_U = get_units_obj('BTU/lbm degR', specific_heat_units) 

self.viscosity_U = get_units_obj('millipoise', viscosity_units) 

self.thermal_cond_U = get_units_obj('mcal/cm-K-s', thermal_cond_units) 

 

self.cea_obj = CEA_Obj_default(propName=propName, oxName=oxName, fuelName=fuelName, 

useFastLookup=useFastLookup, makeOutput=makeOutput, 

fac_CR=fac_CR, make_debug_prints=make_debug_prints) 

self.desc = self.cea_obj.desc 

 

def get_IvacCstrTc(self, Pc=100.0, MR=1.0, eps=40.0, frozen=0, frozenAtThroat=0): 

 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

IspVac, Cstar, Tcomb = self.cea_obj.get_IvacCstrTc( Pc=Pc, MR=MR, eps=eps, 

frozen=frozen, frozenAtThroat=frozenAtThroat ) 

 

IspVac = self.isp_U.dval_to_uval( IspVac ) 

Cstar = self.cstar_U.dval_to_uval( Cstar ) 

Tcomb = self.temperature_U.dval_to_uval( Tcomb ) 

 

return IspVac, Cstar, Tcomb 

 

def getFrozen_IvacCstrTc(self, Pc=100.0, MR=1.0, eps=40.0, frozenAtThroat=0): 

 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

IspFrozen, Cstar, Tcomb = self.cea_obj.getFrozen_IvacCstrTc( Pc=Pc, MR=MR, eps=eps, 

frozenAtThroat=frozenAtThroat) 

IspFrozen = self.isp_U.dval_to_uval( IspFrozen ) 

Cstar = self.cstar_U.dval_to_uval( Cstar ) 

Tcomb = self.temperature_U.dval_to_uval( Tcomb ) 

 

return IspFrozen, Cstar, Tcomb 

 

def get_IvacCstrTc_exitMwGam(self, Pc=100.0, MR=1.0, eps=40.0, frozen=0, frozenAtThroat=0): 

 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

IspVac, Cstar, Tcomb, mw, gam = self.cea_obj.get_IvacCstrTc_exitMwGam( Pc=Pc, MR=MR, eps=eps, 

frozen=frozen, frozenAtThroat=frozenAtThroat) 

 

IspVac = self.isp_U.dval_to_uval( IspVac ) 

Cstar = self.cstar_U.dval_to_uval( Cstar ) 

Tcomb = self.temperature_U.dval_to_uval( Tcomb ) 

 

return IspVac, Cstar, Tcomb, mw, gam 

 

def get_IvacCstrTc_ChmMwGam(self, Pc=100.0, MR=1.0, eps=40.0): 

 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

IspVac, Cstar, Tcomb, mw, gam = self.cea_obj.get_IvacCstrTc_ChmMwGam( Pc=Pc, MR=MR, eps=eps ) 

 

IspVac = self.isp_U.dval_to_uval( IspVac ) 

Cstar = self.cstar_U.dval_to_uval( Cstar ) 

Tcomb = self.temperature_U.dval_to_uval( Tcomb ) 

 

return IspVac, Cstar, Tcomb, mw, gam 

 

def get_IvacCstrTc_ThtMwGam(self, Pc=100.0, MR=1.0, eps=40.0): 

 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

IspVac, Cstar, Tcomb, mw, gam = self.cea_obj.get_IvacCstrTc_ThtMwGam( Pc=Pc, MR=MR, eps=eps ) 

 

IspVac = self.isp_U.dval_to_uval( IspVac ) 

Cstar = self.cstar_U.dval_to_uval( Cstar ) 

Tcomb = self.temperature_U.dval_to_uval( Tcomb ) 

 

return IspVac, Cstar, Tcomb, mw, gam 

 

 

def __call__(self, Pc=100.0, MR=1.0, eps=40.0, frozen=0, frozenAtThroat=0): 

return self.get_Isp(Pc=Pc, MR=MR, eps=eps, frozen=frozen, frozenAtThroat=frozenAtThroat) 

 

def get_Isp(self, Pc=100.0, MR=1.0, eps=40.0, frozen=0, frozenAtThroat=0): 

 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

IspVac = self.cea_obj.get_Isp( Pc=Pc, MR=MR, eps=eps, frozen=frozen, frozenAtThroat=frozenAtThroat ) 

IspVac = self.isp_U.dval_to_uval( IspVac ) 

 

return IspVac 

 

def get_Cstar(self, Pc=100.0, MR=1.0): 

 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

Cstar = self.cea_obj.get_Cstar( Pc=Pc, MR=MR ) 

Cstar = self.cstar_U.dval_to_uval( Cstar ) 

return Cstar 

 

def get_Tcomb(self, Pc=100.0, MR=1.0): 

 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

Tcomb = self.cea_obj.get_Tcomb( Pc=Pc, MR=MR ) 

Tcomb = self.temperature_U.dval_to_uval( Tcomb ) 

return Tcomb 

 

def get_PcOvPe(self, Pc=100.0, MR=1.0, eps=40.0, frozen=0, frozenAtThroat=0): 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

return self.cea_obj.get_PcOvPe( Pc=Pc, MR=MR, eps=eps, 

frozen=frozen, frozenAtThroat=frozenAtThroat ) 

 

def get_eps_at_PcOvPe(self, Pc=100.0, MR=1.0, PcOvPe=1000.0, frozen=0, frozenAtThroat=0): 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

return self.cea_obj.get_eps_at_PcOvPe( Pc=Pc, MR=MR, PcOvPe=PcOvPe, 

frozen=frozen, frozenAtThroat=frozenAtThroat ) 

 

def get_Throat_PcOvPe(self, Pc=100.0, MR=1.0): 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

return self.cea_obj.get_Throat_PcOvPe( Pc=Pc, MR=MR ) 

 

def get_MachNumber(self, Pc=100.0, MR=1.0,eps=40.0, frozen=0, frozenAtThroat=0): 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

return self.cea_obj.get_MachNumber( Pc=Pc, MR=MR, eps=eps, 

frozen=frozen, frozenAtThroat=frozenAtThroat ) 

 

def get_Temperatures(self, Pc=100.0, MR=1.0,eps=40.0, frozen=0, frozenAtThroat=0): 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

tempList = self.cea_obj.get_Temperatures( Pc=Pc, MR=MR, eps=eps, 

frozen=frozen, frozenAtThroat=frozenAtThroat) 

 

for i,T in enumerate( tempList ): 

tempList[i] = self.temperature_U.dval_to_uval( T ) 

return tempList # Tc, Tthroat, Texit 

 

def get_SonicVelocities(self, Pc=100.0, MR=1.0,eps=40.0, frozen=0, frozenAtThroat=0): 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

sonicList = self.cea_obj.get_SonicVelocities( Pc=Pc, MR=MR, eps=eps, 

frozen=frozen, frozenAtThroat=frozenAtThroat ) 

 

for i,S in enumerate( sonicList ): 

sonicList[i] = self.sonic_velocity_U.dval_to_uval( S ) 

return sonicList # Chamber, Throat, Exit 

 

def get_Chamber_SonicVel(self, Pc=100.0, MR=1.0, eps=40.0): 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

sonicVel = self.cea_obj.get_Chamber_SonicVel( Pc=Pc, MR=MR, eps=eps ) 

 

sonicVel = self.sonic_velocity_U.dval_to_uval( sonicVel ) 

return sonicVel 

 

def get_Enthalpies(self, Pc=100.0, MR=1.0,eps=40.0, frozen=0, frozenAtThroat=0): 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

 

hList = self.cea_obj.get_Enthalpies( Pc=Pc, MR=MR, eps=eps, 

frozen=frozen, frozenAtThroat=frozenAtThroat ) 

for i,H in enumerate( hList ): 

hList[i] = self.enthalpy_U.dval_to_uval( H ) 

 

return hList 

def get_SpeciesMassFractions(self, Pc=100.0, MR=1.0,eps=40.0, frozen=0, frozenAtThroat=0, 

min_fraction=0.000005): 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

 

molWtD, massFracD = self.cea_obj.get_SpeciesMassFractions(Pc=Pc, MR=MR, eps=eps, 

frozenAtThroat=frozenAtThroat,min_fraction=min_fraction) 

return molWtD, massFracD 

 

def get_SpeciesMoleFractions(self, Pc=100.0, MR=1.0,eps=40.0, frozen=0, frozenAtThroat=0, 

min_fraction=0.000005): 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

 

molWtD, moleFracD = self.cea_obj.get_SpeciesMoleFractions(Pc=Pc, MR=MR, eps=eps, 

frozenAtThroat=frozenAtThroat, min_fraction=min_fraction) 

return molWtD, moleFracD 

 

def get_Chamber_H(self, Pc=100.0, MR=1.0, eps=40.0): 

 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

H = self.cea_obj.get_Chamber_H( Pc=Pc, MR=MR, eps=eps ) 

return self.enthalpy_U.dval_to_uval( H ) 

 

def get_Densities(self, Pc=100.0, MR=1.0,eps=40.0, frozen=0, frozenAtThroat=0): 

 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

dList = self.cea_obj.get_Densities( Pc=Pc, MR=MR, eps=eps, 

frozen=frozen, frozenAtThroat=frozenAtThroat ) 

 

for i,d in enumerate( dList ): 

dList[i] = self.density_U.dval_to_uval( d ) 

 

return dList 

 

def get_Chamber_Density(self, Pc=100.0, MR=1.0, eps=40.0): 

 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

H = self.cea_obj.get_Chamber_Density( Pc=Pc, MR=MR, eps=eps ) 

return self.density_U.dval_to_uval( H ) 

 

def get_HeatCapacities(self, Pc=100.0, MR=1.0,eps=40.0, frozen=0, frozenAtThroat=0): 

 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

cpList = self.cea_obj.get_HeatCapacities( Pc=Pc, MR=MR, eps=eps, 

frozen=frozen, frozenAtThroat=frozenAtThroat ) 

 

for i,cp in enumerate( cpList ): 

cpList[i] = self.specific_heat_U.dval_to_uval( cp ) 

 

return cpList 

 

def get_Chamber_Cp(self, Pc=100.0, MR=1.0, eps=40.0): 

 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

Cp = self.cea_obj.get_Chamber_Cp( Pc=Pc, MR=MR, eps=eps ) 

return self.specific_heat_U.dval_to_uval( Cp ) 

 

def get_Throat_Isp(self, Pc=100.0, MR=1.0, frozen=0): 

 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

Isp = self.cea_obj.get_Throat_Isp( Pc=Pc, MR=MR, frozen=frozen) 

Isp = self.isp_U.dval_to_uval( Isp ) 

 

return Isp 

 

def get_Chamber_MolWt_gamma(self, Pc=100.0, MR=1.0, eps=40.0): 

 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

return self.cea_obj.get_Chamber_MolWt_gamma( Pc=Pc, MR=MR, eps=eps ) 

 

def get_Throat_MolWt_gamma(self, Pc=100.0, MR=1.0, eps=40.0, frozen=0): 

 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

return self.cea_obj.get_Throat_MolWt_gamma( Pc=Pc, MR=MR, eps=eps, frozen=frozen ) 

 

def get_exit_MolWt_gamma(self, Pc=100.0, MR=1.0, eps=40.0): 

 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

return self.cea_obj.get_exit_MolWt_gamma( Pc=Pc, MR=MR, eps=eps ) 

 

def get_eqratio(self, Pc=100.0, MR=1.0, eps=40.0): 

 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

return self.cea_obj.get_eqratio( Pc=Pc, MR=MR, eps=eps ) 

 

def getMRforER(self, ERphi=None, ERr=None): 

return self.cea_obj.getMRforER( ERphi=ERphi, ERr=ERr ) 

 

def get_description(self): 

return self.cea_obj.get_description() 

 

def estimate_Ambient_Isp(self, Pc=100.0, MR=1.0, eps=40.0, Pamb=14.7, 

frozen=0, frozenAtThroat=0): 

 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

Pamb = self.Pc_U.uval_to_dval( Pamb ) # convert user units to psia 

IspAmb, mode = self.cea_obj.estimate_Ambient_Isp(Pc=Pc, MR=MR, eps=eps, Pamb=Pamb, 

frozen=frozen, frozenAtThroat=frozenAtThroat) 

 

IspAmb = self.isp_U.dval_to_uval( IspAmb ) 

 

return IspAmb, mode 

 

 

def get_PambCf(self, Pamb=14.7, Pc=100.0, MR=1.0, eps=40.0): 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

Pamb = self.Pc_U.uval_to_dval( Pamb ) # convert user units to psia 

 

CFcea, CF, mode = self.cea_obj.get_PambCf( Pamb=Pamb, Pc=Pc, MR=MR, eps=eps) 

 

return CFcea, CF, mode 

 

def getFrozen_PambCf(self, Pamb=0.0, Pc=100.0, MR=1.0, eps=40.0, frozenAtThroat=0): 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

Pamb = self.Pc_U.uval_to_dval( Pamb ) # convert user units to psia 

 

CFcea,CFfrozen, mode = self.cea_obj.getFrozen_PambCf( Pamb=Pamb, Pc=Pc, MR=MR, eps=eps, 

frozenAtThroat=frozenAtThroat) 

 

return CFcea,CFfrozen, mode 

 

 

 

def get_Chamber_Transport(self, Pc=100.0, MR=1.0, eps=40.0, frozen=0): 

 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

Cp, visc, cond, Prandtl = self.cea_obj.get_Chamber_Transport( Pc=Pc, MR=MR, eps=eps, frozen=frozen) 

 

#Cp = Cp * 8314.51 / 4184.0 # convert into BTU/lbm degR 

Cp = self.specific_heat_U.dval_to_uval( Cp ) 

visc = self.viscosity_U.dval_to_uval( visc ) 

cond = self.thermal_cond_U.dval_to_uval( cond ) 

 

return Cp, visc, cond, Prandtl 

 

def get_Throat_Transport(self, Pc=100.0, MR=1.0, eps=40.0, frozen=0): 

 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

Cp, visc, cond, Prandtl = self.cea_obj.get_Throat_Transport( Pc=Pc, MR=MR, eps=eps, frozen=frozen) 

 

#Cp = Cp * 8314.51 / 4184.0 # convert into BTU/lbm degR 

Cp = self.specific_heat_U.dval_to_uval( Cp ) 

visc = self.viscosity_U.dval_to_uval( visc ) 

cond = self.thermal_cond_U.dval_to_uval( cond ) 

 

return Cp, visc, cond, Prandtl 

 

def get_Exit_Transport(self, Pc=100.0, MR=1.0, eps=40.0, frozen=0): 

 

Pc = self.Pc_U.uval_to_dval( Pc ) # convert user units to psia 

Cp, visc, cond, Prandtl = self.cea_obj.get_Exit_Transport( Pc=Pc, MR=MR, eps=eps, frozen=frozen) 

 

Cp = Cp * 8314.51 / 4184.0 # convert into BTU/lbm degR 

Cp = self.specific_heat_U.dval_to_uval( Cp ) 

visc = self.viscosity_U.dval_to_uval( visc ) 

cond = self.thermal_cond_U.dval_to_uval( cond ) 

 

return Cp, visc, cond, Prandtl 

 

if __name__ == "__main__": 

 

C = CEA_Obj(oxName='N2O4', fuelName="MMH", 

isp_units='sec', cstar_units='ft/sec', 

pressure_units='psia', temperature_units='degR', 

sonic_velocity_units='ft/sec', enthalpy_units='BTU/lbm', 

density_units='lbm/cuft', specific_heat_units='BTU/lbm degR', 

viscosity_units='millipoise', thermal_cond_units='mcal/cm-K-s') 

 

Cmpa = CEA_Obj(oxName='N2O4', fuelName="MMH", 

isp_units='sec', cstar_units='ft/sec', 

pressure_units='MPa', temperature_units='degR', 

sonic_velocity_units='ft/sec', enthalpy_units='BTU/lbm', 

density_units='lbm/cuft', specific_heat_units='BTU/lbm degR', 

viscosity_units='millipoise', thermal_cond_units='mcal/cm-K-s') 

 

 

Csi=CEA_Obj( oxName='N2O4', fuelName="MMH", 

isp_units='N sec/kg', cstar_units='m/sec', 

pressure_units='MPa', temperature_units='C', 

sonic_velocity_units='m/sec', enthalpy_units='cal/g', 

density_units='sg', specific_heat_units='cal/g C', 

viscosity_units='poise', thermal_cond_units='cal/s-cm-degC') 

 

def make_a_list( result ): 

if type(result) == type("string"): 

rL = [ result ] 

else: 

try: 

rL = list( result ) 

except: 

rL = list( (result,) ) 

 

for i,v in enumerate(rL): 

try: 

rL[i] = '%g'%v 

except: 

rL[i] = '%s'%v 

return rL 

 

def chk_method( mname, max_chks=99, **D ): 

# get English unit results 

r1 = getattr(C, mname)( **D ) 

 

if 'Pc' in D: 

D['Pc'] = D['Pc'] * 0.00689476 # change to MPa 

if 'Pamb' in D: 

D['Pamb'] = D['Pamb'] * 0.00689476 # change to MPa 

# get Mpa results where Pc is equal to English run. 

r2 = getattr(Cmpa, mname)( **D ) 

Ngood = 0 

Nbad = 0 

sL = [] 

 

# make lists of output values from english and Mpa runs 

r1L = make_a_list( r1 ) 

r2L = make_a_list( r2 ) 

 

# check that both give same results 

for i,v in enumerate( r1L ): 

if i>=max_chks: 

break 

sL.append(v) 

if r1L[i] == r2L[i]: 

Ngood += 1 

else: 

Nbad += 1 

 

 

if Nbad > 0: 

print( 'Chk:',mname, sL, 'Ngood=%i'%Ngood, ' NBAD=%i'%Nbad ) 

print( ' r1L',r1L ) 

print( ' r2L',r2L ) 

else: 

print( 'Chk:',mname, 'ALL GOOD:%i -->'%Ngood, sL ) 

 

chk_method('get_IvacCstrTc', **{'Pc':100.0}) 

chk_method('get_IvacCstrTc', **{'Pc':100.0, 'frozen':1}) 

chk_method('getFrozen_IvacCstrTc', **{'Pc':100.0}) 

 

chk_method('get_IvacCstrTc_exitMwGam', **{'Pc':100.0}) 

chk_method('get_IvacCstrTc_exitMwGam', **{'Pc':100.0, 'frozen':1}) 

chk_method('get_IvacCstrTc_ChmMwGam', **{'Pc':100.0}) 

chk_method('get_IvacCstrTc_ThtMwGam', **{'Pc':100.0}) 

chk_method('get_Isp', **{'Pc':100.0, 'frozen':1}) 

chk_method('get_Cstar',**{'Pc':100.0}) 

chk_method('get_Tcomb',**{'Pc':100.0}) 

chk_method('get_PcOvPe',**{'Pc':100.0}) 

chk_method('get_eps_at_PcOvPe',**{'Pc':100.0, 'PcOvPe':554.5}) 

chk_method('get_eps_at_PcOvPe',**{'Pc':100.0, 'PcOvPe':554.5, 'frozen':1}) 

 

chk_method('get_Throat_PcOvPe',**{'Pc':100.0}) 

chk_method('get_MachNumber',**{'Pc':100.0}) 

chk_method('get_MachNumber',**{'Pc':100.0, 'frozen':1}) 

chk_method('get_Temperatures',**{'Pc':100.0}) 

chk_method('get_SonicVelocities',**{'Pc':100.0}) 

chk_method('get_SonicVelocities',**{'Pc':100.0, 'frozen':1}) 

chk_method('get_Chamber_SonicVel',**{'Pc':100.0}) 

chk_method('get_Enthalpies',**{'Pc':100.0}) 

chk_method('get_Enthalpies',**{'Pc':100.0, 'frozen':1}) 

chk_method('get_Chamber_H',**{'Pc':100.0}) 

chk_method('get_Densities',**{'Pc':100.0}) 

chk_method('get_Densities',**{'Pc':100.0, 'frozen':1}) 

chk_method('get_Chamber_Density',**{'Pc':100.0}) 

chk_method('get_HeatCapacities',**{'Pc':100.0}) 

chk_method('get_HeatCapacities',**{'Pc':100.0, 'frozen':1}) 

chk_method('get_Chamber_Cp',**{'Pc':100.0}) 

chk_method('get_Throat_Isp',**{'Pc':100.0}) 

chk_method('get_Throat_Isp',**{'Pc':100.0, 'frozen':1}) 

chk_method('get_Chamber_MolWt_gamma',**{'Pc':100.0}) 

chk_method('get_Throat_MolWt_gamma',**{'Pc':100.0}) 

chk_method('get_Throat_MolWt_gamma',**{'Pc':100.0, 'frozen':1}) 

chk_method('get_exit_MolWt_gamma',**{'Pc':100.0}) 

chk_method('get_eqratio',**{'Pc':100.0}) 

chk_method('getMRforER',**{'ERphi':1.0}) 

chk_method('get_description') 

chk_method('estimate_Ambient_Isp', max_chks=1,**{'Pc':100.0, 'Pamb':14.7}) 

chk_method('get_Chamber_Transport',**{'Pc':100.0, 'frozen':0}) 

chk_method('get_Chamber_Transport',**{'Pc':100.0, 'frozen':1}) 

 

chk_method('get_Throat_Transport',**{'Pc':100.0, 'frozen':0}) 

chk_method('get_Throat_Transport',**{'Pc':100.0, 'frozen':1}) 

chk_method('get_Exit_Transport',**{'Pc':100.0, 'frozen':0}) 

chk_method('get_Exit_Transport',**{'Pc':100.0, 'frozen':1}) 

 

chk_method('get_PambCf', max_chks=2, **{'Pc':100.0, 'Pamb':14.7}) 

chk_method('getFrozen_PambCf', max_chks=2, **{'Pc':100.0, 'Pamb':14.7, 'frozenAtThroat':1}) 

 

chk_method('get_SpeciesMassFractions', max_chks=1,**{'Pc':100.0, 'frozen':1, 'frozenAtThroat':0}) 

chk_method('get_SpeciesMoleFractions', max_chks=1,**{'Pc':100.0, 'frozen':0, 'frozenAtThroat':0})