对齐PNL0002上游温度并稳定热流体闭合

tests/test_pressure_flow_solver_initialization.py

@@ -11,6 +11,8 @@ from app.simulation.components.amesim.flow.orifices import (
 )
 from app.simulation.components.amesim.flow.pipes import AmesimPnl00r
 from app.simulation.components.amesim.flow.pipes import AmesimPnl0001
+from app.simulation.components.amesim.flow.pipes import AmesimPnl0002
+from app.simulation.components.amesim.junctions.nodes import AmesimPn3Node2
 from app.simulation.components.amesim.media.mediums import (
     AmesimHeliumPengRobinsonMedium,
 )
@@ -142,6 +144,49 @@ class PressureFlowSolverInitializationTests(unittest.TestCase):
         )
         self.assertAlmostEqual(valve.port_3.m_flow, -valve.port_2.m_flow, places=12)
 
+    def test_stream_dependent_pipe_flow_closes_with_junction_mixing_in_one_rhs(self) -> None:
+        medium = IdealGasMedium()
+        hot = Cylinder("hot", medium, V=0.1, p0=500_000.0, T0=400.0)
+        cold = Cylinder("cold", medium, V=0.1, p0=500_000.0, T0=250.0)
+        sink = Tank("sink", medium, V=0.1, p0=100_000.0, T0=300.0)
+        hot_line = AmesimPnl00r("hot_line", medium, diam=0.01, le=0.5)
+        cold_line = AmesimPnl00r("cold_line", medium, diam=0.01, le=0.5)
+        junction = AmesimPn3Node2("junction")
+        pipe = AmesimPnl0002(
+            "pipe",
+            medium,
+            diam=0.01,
+            le=1.0,
+            p0=200_000.0,
+            T0=300.0,
+        )
+        network = SimulationNetwork("stream-flow-fixed-point")
+        for component in (
+            hot,
+            cold,
+            sink,
+            hot_line,
+            cold_line,
+            junction,
+            pipe,
+        ):
+            network.add_component(component)
+        network.connect("hot", "port_b", "hot_line", "port_1")
+        network.connect("hot_line", "port_2", "junction", "port_1")
+        network.connect("cold", "port_b", "cold_line", "port_1")
+        network.connect("cold_line", "port_2", "junction", "port_3")
+        network.connect("junction", "port_2", "pipe", "port_1")
+        network.connect("pipe", "port_2", "sink", "port_a")
+
+        system = GenericFluidSystem(network)
+        state = system.consistent_initial_state_vector()
+        first = system.rhs(0.0, state)
+        second = system.rhs(0.0, state)
+
+        self.assertGreater(system.max_thermofluid_iterations, 1)
+        for first_value, second_value in zip(first, second):
+            self.assertAlmostEqual(first_value, second_value, places=10)
+
     def test_current_storage_pressure_reseeds_stale_orifice_ports_and_flow(self) -> None:
         network, medium, high, low, valve = self._near_equal_pressure_network()
         solver = PressureFlowSolver(network, max_evaluations=10)