def setUp(self): self.gas = ct.importPhase('h2o2.cti') # create a reservoir for the fuel inlet, and set to pure methane. self.gas.set(T=300.0, P=ct.OneAtm, X='H2:1.0') fuel_in = reactors.Reservoir(self.gas) fuel_mw = self.gas.meanMolarMass() # Oxidizer inlet self.gas.set(T=300.0, P=ct.OneAtm, X='O2:1.0, AR:3.0') oxidizer_in = reactors.Reservoir(self.gas) oxidizer_mw = self.gas.meanMolarMass() # to ignite the fuel/air mixture, we'll introduce a pulse of radicals. # The steady-state behavior is independent of how we do this, so we'll # just use a stream of pure atomic hydrogen. self.gas.set(T=300.0, P=ct.OneAtm, X='H:1.0') self.igniter = reactors.Reservoir(self.gas) # create the combustor, and fill it in initially with a diluent self.gas.set(T=300.0, P=ct.OneAtm, X='AR:1.0') self.combustor = reactors.Reactor(contents=self.gas, volume=1.0) # create a reservoir for the exhaust self.exhaust = reactors.Reservoir(self.gas) # compute fuel and air mass flow rates factor = 0.1 oxidizer_mdot = 4 * factor * oxidizer_mw fuel_mdot = factor * fuel_mw # create and install the mass flow controllers. Controllers # m1 and m2 provide constant mass flow rates, and m3 provides # a short Gaussian pulse only to ignite the mixture m1 = reactors.MassFlowController(upstream=fuel_in, downstream=self.combustor, mdot=fuel_mdot) m2 = reactors.MassFlowController(upstream=oxidizer_in, downstream=self.combustor, mdot=oxidizer_mdot) # The igniter will use a Gaussian 'functor' object to specify the # time-dependent igniter mass flow rate. igniter_mdot = Gaussian(t0=0.1, FWHM=0.05, A=0.1) m3 = reactors.MassFlowController(upstream=self.igniter, downstream=self.combustor, mdot=igniter_mdot) # put a valve on the exhaust line to regulate the pressure self.v = reactors.Valve(upstream=self.combustor, downstream=self.exhaust, Kv=1.0) # the simulation only contains one reactor self.sim = reactors.ReactorNet([self.combustor])