完善 PNL00R 摩擦模型与八路回归

tests/test_pressure_flow_solver_initialization.py

@@ -7,6 +7,7 @@ from unittest.mock import patch
 from app.simulation.components.amesim.boundary.sources import AmesimPnpl01
 from app.simulation.components.amesim.flow.orifices import (
     AmesimPnor001,
+    AmesimPnvo001FixedOpening,
     AmesimPnvo001SignalOpening,
 )
 from app.simulation.components.amesim.flow.pipes import AmesimPnl00r
@@ -110,6 +111,62 @@ class PressureFlowSolverInitializationTests(unittest.TestCase):
         self.assertAlmostEqual(valve.port_2.p, pipe.port_1.p)
         self.assertAlmostEqual(-valve.port_2.m_flow, pipe.port_1.m_flow)
 
+    def test_pnvo_pnl00r_series_pressure_is_seeded_by_flow_balance(self) -> None:
+        medium = IdealGasMedium()
+        source = Cylinder(
+            "source",
+            medium,
+            V=0.01,
+            p0=150_000.0,
+            T0=300.0,
+        )
+        valve = AmesimPnvo001FixedOpening(
+            "valve",
+            medium,
+            opening=0.5,
+        )
+        pipe = AmesimPnl00r(
+            "pipe",
+            medium,
+            diam=0.02,
+            le=1.0,
+            rr=1.0e-5,
+        )
+        sink = Tank(
+            "sink",
+            medium,
+            V=0.1,
+            p0=100_000.0,
+            T0=300.0,
+        )
+        network = SimulationNetwork("pnvo-pnl00r-series")
+        for component in (source, valve, pipe, sink):
+            network.add_component(component)
+        network.connect("source", "port_b", "valve", "port_2")
+        network.connect("valve", "port_3", "pipe", "port_1")
+        network.connect("pipe", "port_2", "sink", "port_a")
+        source.refresh_thermodynamic_ports()
+        sink.refresh_thermodynamic_ports()
+
+        solver = PressureFlowSolver(network)
+        result = solver.solve()
+
+        self.assertTrue(result.success)
+        self.assertEqual(result.evaluations, 0)
+        self.assertGreater(valve.port_3.p, pipe.port_2.p)
+        self.assertLess(valve.port_3.p, source.port_b.p)
+        self.assertAlmostEqual(valve.port_3.p, pipe.port_1.p)
+        self.assertAlmostEqual(
+            -valve.port_3.m_flow,
+            pipe.port_1.m_flow,
+            delta=1.0e-10,
+        )
+        self.assertFalse(solver.causal_fast_path_eligible)
+        self.assertEqual(
+            solver.causal_execution_diagnostics()["fallbackReason"],
+            "specialSeriesPressureSeed",
+        )
+
     def test_dead_ended_pnl00r_is_seeded_at_zero_flow_pressure(self) -> None:
         medium = IdealGasMedium()
         pipe = AmesimPnl00r("resistance", medium)