实现test_mql PNL0002管路动态
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@@ -477,6 +477,199 @@ class AmesimPnl0003Pipe(_DarcyPipeResistanceMixin, DynamicComponent):
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)
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class AmesimPnl0002Pipe(_DarcyPipeResistanceMixin, DynamicComponent):
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"""First-pass AMESim ``PNL0002`` (R-C-R) pipe.
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The center compliance owns the gas state. Positive connection mass flows
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enter that center storage from each external port.
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"""
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state_size = 2
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def __init__(
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self,
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name: str,
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*,
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diameter_mm: float,
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length_m: float,
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relative_roughness: float,
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polytropic_constant: float = 1.35,
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heat_transfer_coefficient: float = 0.0,
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external_temperature_k: float = 293.15,
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gas: AmesimPneumaticGas = HELIUM_PNEUMATIC_GAS,
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pctr_0: float = 101_325.0,
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Tctr_0: float = 293.15,
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) -> None:
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if diameter_mm <= 0.0:
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raise ValueError("diameter_mm must be positive")
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if length_m <= 0.0:
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raise ValueError("length_m must be positive")
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if relative_roughness < 0.0:
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raise ValueError("relative_roughness must be non-negative")
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if polytropic_constant <= 0.0:
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raise ValueError("polytropic_constant must be positive")
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if heat_transfer_coefficient < 0.0:
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raise ValueError("heat_transfer_coefficient must be non-negative")
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if external_temperature_k <= 0.0:
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raise ValueError("external_temperature_k must be positive")
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super().__init__(name=name)
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self.diameter = diameter_mm * 1.0e-3
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self.length = length_m
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self.relative_roughness = relative_roughness
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self.polytropic_constant = polytropic_constant
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self.heat_transfer_coefficient = heat_transfer_coefficient
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self.external_temperature = external_temperature_k
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self.gas = gas
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self.area = diameter_mm_to_area_m2(diameter_mm)
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self.volume = self.area * self.length
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self.heat_transfer_area = pi * self.diameter * self.length
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self._resistance_length = self.length / 2.0
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rho0 = gas.density(pctr_0, Tctr_0)
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mass0 = rho0 * self.volume
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self.state = VolumeState(
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m=mass0,
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U=mass0 * gas.specific_internal_energy(Tctr_0),
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)
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self.port_1 = PortState()
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self.port_2 = PortState()
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def get_state_vector(self) -> list[float]:
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return self.state.as_vector()
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def set_state_vector(self, values: list[float]) -> None:
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self.state = VolumeState.from_vector(values)
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def properties(self) -> ThermodynamicProperties:
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if self.state.m <= 0.0:
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raise ValueError("pipe mass must stay positive")
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temperature = self.gas.temperature_from_internal_energy(
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self.state.U / self.state.m
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)
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density = self.state.m / self.volume
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pressure = self.gas.pressure(density, temperature)
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properties = ThermodynamicProperties(
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p=pressure,
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T=temperature,
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rho=density,
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u=self.state.U / self.state.m,
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h=self.gas.specific_enthalpy(temperature),
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)
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self.port_1.p = pressure
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self.port_1.h_outflow = properties.h
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self.port_2.p = pressure
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self.port_2.h_outflow = properties.h
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return properties
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def gas_mass_g(self) -> float:
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return self.state.m * 1.0e3
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def port_mass_flow(
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self,
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*,
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port_pressure_pa: float,
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port_temperature_k: float,
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) -> float:
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"""Return mass flow from an external port into the center storage."""
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if port_pressure_pa <= 0.0:
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raise ValueError("port_pressure_pa must be positive")
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if port_temperature_k <= 0.0:
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raise ValueError("port_temperature_k must be positive")
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center = self.properties()
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pressure_difference = port_pressure_pa - center.p
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if pressure_difference == 0.0:
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return 0.0
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upstream_pressure = max(port_pressure_pa, center.p)
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upstream_temperature = (
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port_temperature_k if pressure_difference > 0.0 else center.T
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)
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density = self.gas.density(upstream_pressure, upstream_temperature)
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magnitude = self._mass_flow_for_resistance_pressure_drop(
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abs(pressure_difference),
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density=density,
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temperature=upstream_temperature,
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)
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return magnitude if pressure_difference > 0.0 else -magnitude
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def _mass_flow_for_resistance_pressure_drop(
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self,
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pressure_drop_pa: float,
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*,
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density: float,
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temperature: float,
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) -> float:
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original_length = self.length
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self.length = self._resistance_length
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try:
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return self._mass_flow_for_pressure_drop(
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pressure_drop_pa,
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density=density,
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temperature=temperature,
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)
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finally:
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self.length = original_length
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def diagnostics(
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self,
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*,
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mass_flow_kg_s: float,
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temperature_k: float | None = None,
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) -> AmesimPnl0001Diagnostics:
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properties = self.properties()
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temperature = temperature_k or properties.T
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reynolds = self._reynolds_number(mass_flow_kg_s, temperature)
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friction_factor = self._friction_factor(reynolds)
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velocity = mass_flow_kg_s / (properties.rho * self.area)
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original_length = self.length
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self.length = self._resistance_length
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try:
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pressure_drop = self._darcy_pressure_drop(
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mass_flow_kg_s,
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density=properties.rho,
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temperature=temperature,
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)
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finally:
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self.length = original_length
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return AmesimPnl0001Diagnostics(
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mass_flow_kg_s=mass_flow_kg_s,
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reynolds_number=reynolds,
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gas_velocity_m_s=velocity,
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friction_factor=friction_factor,
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pressure_drop_pa=pressure_drop,
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)
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def derivatives_from_connections(
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self,
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*,
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port_1_m_flow: float,
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connected_h_1: float,
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port_2_m_flow: float,
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connected_h_2: float,
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) -> VolumeState:
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center = self.properties()
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inlet_h_1 = self.connection_inlet_enthalpy(
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port_m_flow=port_1_m_flow,
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connected_h=connected_h_1,
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internal_h=center.h,
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)
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inlet_h_2 = self.connection_inlet_enthalpy(
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port_m_flow=port_2_m_flow,
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connected_h=connected_h_2,
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internal_h=center.h,
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)
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heat_flow = (
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self.heat_transfer_coefficient
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* self.heat_transfer_area
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* (self.external_temperature - center.T)
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)
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return VolumeState(
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m=port_1_m_flow + port_2_m_flow,
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U=port_1_m_flow * inlet_h_1 + port_2_m_flow * inlet_h_2 + heat_flow,
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)
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class AmesimPnl00rPipe(_DarcyPipeResistanceMixin, AlgebraicComponent):
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"""First-pass AMESim ``PNL00R`` (R) pipe resistance."""
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