copv.blowdown_solver.TankState Class Reference

Public Member Functions
	__init__ (self, float vol_total, float m_prop_initial, float rho_prop, float P_initial, float T_gas_initial, float R_gas, Optional[RegularGridInterpolator] Z_interp, float n_poly=1.2)
	get_Z (self, T, P)
float	step (self, float mdot, float dt, float mdot_gas=0.0)
	solve_pressure (self, T, V, P_guess)

Public Attributes
	V_total = vol_total
float	m_prop = m_prop_initial
	rho = rho_prop
	n_poly = n_poly
	R = R_gas
	Z_interp = Z_interp
	T0 = T_gas_initial
	V_ullage_0 = self.V_total - (self.m_prop / self.rho)
	V_ullage = self.V_ullage_0
	T_gas = T_gas_initial
	P_gas = P_initial
tuple	m_gas = (self.P_gas * self.V_ullage_0) / (Z * self.R * self.T_gas)
tuple	m_gas_0 = self.m_gas

Detailed Description

Helper class to track individual tank state during blowdown.

Definition at line 182 of file blowdown_solver.py.

Constructor & Destructor Documentation

__init__()

copv.blowdown_solver.TankState.__init__	(		self,
		float	vol_total,
		float	m_prop_initial,
		float	rho_prop,
		float	P_initial,
		float	T_gas_initial,
		float	R_gas,
		Optional[RegularGridInterpolator]	Z_interp,
		float	n_poly = 1.2 )

Definition at line 184 of file blowdown_solver.py.

Member Function Documentation

get_Z()

copv.blowdown_solver.TankState.get_Z	(		self,
			T,
			P )

Definition at line 218 of file blowdown_solver.py.

References Z_interp, and copv.blowdown_solver.Z_lookup().

Referenced by solve_pressure().

solve_pressure()

copv.blowdown_solver.TankState.solve_pressure	(		self,
			T,
			V,
			P_guess )

Definition at line 294 of file blowdown_solver.py.

References get_Z(), m_gas, max, R, feedtwin.props.backends.coolprop._Dome.R, fsw::calibration::NoiseCoefficients.R, and HSEM_TypeDef.R.

step()

float copv.blowdown_solver.TankState.step	(		self,
		float	mdot,
		float	dt,
		float	mdot_gas = 0.0 )

Advance tank state by dt. 

Args:
    mdot: Liquid propellant mass flow rate [kg/s] (leaving tank)
    dt: Time step [s]
    mdot_gas: Gas/Pressurant mass flow rate [kg/s] (leaving tank, venting)
    
Returns:
    New Pressure [Pa]

Definition at line 223 of file blowdown_solver.py.

References m_gas, m_prop, max, P_gas, rho, fsw::control::RobustDDPController::Config.rho, V_total, and V_ullage.

Referenced by engine.pipeline.thermal.wall_conduction.WallModel.advance(), and engine.pipeline.thermal.wall_conduction.WallModel.soak().

Member Data Documentation

m_gas

tuple copv.blowdown_solver.TankState.m_gas = (self.P_gas * self.V_ullage_0) / (Z * self.R * self.T_gas)

Definition at line 216 of file blowdown_solver.py.

Referenced by solve_pressure(), and step().

m_gas_0

tuple copv.blowdown_solver.TankState.m_gas_0 = self.m_gas

Definition at line 282 of file blowdown_solver.py.

m_prop

float copv.blowdown_solver.TankState.m_prop = m_prop_initial

Definition at line 196 of file blowdown_solver.py.

Referenced by step().

n_poly

copv.blowdown_solver.TankState.n_poly = n_poly

Definition at line 198 of file blowdown_solver.py.

P_gas

copv.blowdown_solver.TankState.P_gas = P_initial

Definition at line 212 of file blowdown_solver.py.

Referenced by step().

R

copv.blowdown_solver.TankState.R = R_gas

Definition at line 199 of file blowdown_solver.py.

Referenced by solve_pressure().

rho

copv.blowdown_solver.TankState.rho = rho_prop

Definition at line 197 of file blowdown_solver.py.

Referenced by engine.control.robust_ddp.data_models.ControllerConfig.__post_init__(), engine.core.injectors.impinging._RingManifold.march(), feedtwin.props.state.ThermoState.nu(), engine.layerx.diag.start.StartLine.R_head(), feed_line_K.Run.report(), step(), and feed_line_K.Run.straight().

T0

copv.blowdown_solver.TankState.T0 = T_gas_initial

Definition at line 201 of file blowdown_solver.py.

T_gas

copv.blowdown_solver.TankState.T_gas = T_gas_initial

Definition at line 211 of file blowdown_solver.py.

V_total

copv.blowdown_solver.TankState.V_total = vol_total

Definition at line 195 of file blowdown_solver.py.

Referenced by step().

V_ullage

copv.blowdown_solver.TankState.V_ullage = self.V_ullage_0

Definition at line 208 of file blowdown_solver.py.

Referenced by step().

V_ullage_0

copv.blowdown_solver.TankState.V_ullage_0 = self.V_total - (self.m_prop / self.rho)

Definition at line 204 of file blowdown_solver.py.

Z_interp

copv.blowdown_solver.TankState.Z_interp = Z_interp

Definition at line 200 of file blowdown_solver.py.

Referenced by get_Z().

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The documentation for this class was generated from the following file:

• EngineDesign/copv/blowdown_solver.py