校准第二支路热流体能量与管路摩擦

app/simulation/components/amesim/junctions/nodes.py

@@ -10,13 +10,20 @@ from app.simulation.core.ports import PortDefinition, PortState
 
 
 class _AmesimPneumaticNode(AlgebraicComponent):
-    """Shared implementation for AMESim pneumatic junction submodels."""
+    """Shared implementation for AMESim pneumatic junction submodels.
+
+    PN3NODE2/P4NODE2 use port 2 as their pressure and temperature reference.
+    Non-reference outlet ports use that reference temperature. When port 2 is
+    an outlet, its enthalpy is the residual that closes the junction energy
+    balance, matching the AMESim dh2 causality.
+    """
 
     REFERENCE_PORT = "port_2"
 
     def __init__(self, name: str) -> None:
         super().__init__(name=name)
         self.set_parameter_values({})
+        self.temperature_reference_h = 0.0
         for definition in self.PORTS:
             setattr(self, definition.name, self.register_declared_port(definition.name))
 
@@ -58,6 +65,10 @@ class _AmesimPneumaticNode(AlgebraicComponent):
         return tuple(residuals)
 
     def update_stream_outflows(self, connected_h: Mapping[str, float]) -> None:
+        self.temperature_reference_h = connected_h.get(
+            self.REFERENCE_PORT,
+            sum(connected_h.values()) / len(connected_h) if connected_h else 0.0,
+        )
         incoming = [
             (port.m_flow, connected_h[name])
             for name, port in self.ports.items()
@@ -67,19 +78,37 @@ class _AmesimPneumaticNode(AlgebraicComponent):
         if total_flow > 1e-12:
             mixed_h = sum(m_flow * h for m_flow, h in incoming) / total_flow
         else:
-            mixed_h = connected_h.get(
-                self.REFERENCE_PORT,
-                sum(connected_h.values()) / len(connected_h) if connected_h else 0.0,
+            mixed_h = self.temperature_reference_h
+
+        reference_port = self.get_port(self.REFERENCE_PORT)
+        for name, port in self.ports.items():
+            port.h_outflow = (
+                mixed_h
+                if name == self.REFERENCE_PORT
+                else self.temperature_reference_h
+            )
+
+        if reference_port.m_flow < -1e-12:
+            energy_without_reference = sum(
+                port.m_flow
+                * (
+                    connected_h[name]
+                    if port.m_flow > 1e-12
+                    else self.temperature_reference_h
+                )
+                for name, port in self.ports.items()
+                if name != self.REFERENCE_PORT
+            )
+            reference_port.h_outflow = (
+                -energy_without_reference / reference_port.m_flow
             )
-        for port in self.ports.values():
-            port.h_outflow = mixed_h
 
 
 class AmesimPn3Node2(_AmesimPneumaticNode):
     """AMESim PN3NODE2 pneumatic three-port junction."""
 
     MODEL_TYPE = "amesim_pn3node2"
-    MODEL_VERSION = "0.1.0"
+    MODEL_VERSION = "0.3.0"
     PORTS = (
         PortDefinition.pneumatic("port_1", nominal_role="bidirectional"),
         PortDefinition.pneumatic("port_2", nominal_role="bidirectional"),
@@ -115,7 +144,7 @@ class AmesimP4Node2(_AmesimPneumaticNode):
     """AMESim P4NODE2 pneumatic four-port junction."""
 
     MODEL_TYPE = "amesim_p4node2"
-    MODEL_VERSION = "0.1.0"
+    MODEL_VERSION = "0.3.0"
     PORTS = (
         PortDefinition.pneumatic("port_1", nominal_role="bidirectional"),
         PortDefinition.pneumatic("port_2", nominal_role="bidirectional"),