接入AMESim help文档与PNVO流量诊断

tests/test_amesim_pnl0001_pipe.py

@@ -39,6 +39,26 @@ class AmesimPnl0001PipeTests(unittest.TestCase):
         self.assertLess(reverse, 0.0)
         self.assertAlmostEqual(abs(forward), abs(reverse), delta=abs(forward) * 0.01)
 
+    def test_calibrated_linear_conductance_overrides_darcy_flow(self) -> None:
+        pipe = AmesimPnl0001Pipe(
+            name="linear",
+            diameter_mm=20.0,
+            length_m=1.0,
+            relative_roughness=0.045 / 20.0,
+            calibrated_linear_conductance=5.5636e-6,
+            p0=200000.0,
+            T0=293.15,
+        )
+        flow = pipe.resistance_mass_flow(
+            port_1_pressure_pa=180000.0,
+            port_1_temperature_k=293.15,
+        )
+
+        self.assertAlmostEqual(
+            flow,
+            5.5636e-6 * (180000.0 - 200000.0) / (293.15 ** 0.5),
+        )
+
     def test_diagnostics_reproduce_laminar_friction_contract(self) -> None:
         diagnostics = self.pipe.diagnostics(mass_flow_kg_s=8.90603914774626e-6)
 
@@ -51,6 +71,16 @@ class AmesimPnl0001PipeTests(unittest.TestCase):
         self.assertGreater(diagnostics.gas_velocity_m_s, 0.0)
         self.assertGreater(diagnostics.pressure_drop_pa, 0.0)
 
+    def test_darcy_pressure_drop_for_state_uses_supplied_density_state(self) -> None:
+        diagnostics = self.pipe.diagnostics(mass_flow_kg_s=8.90603914774626e-6)
+        pressure_drop = self.pipe.darcy_pressure_drop_for_state(
+            mass_flow_kg_s=8.90603914774626e-6,
+            pressure_pa=self.pipe.properties().p,
+            temperature_k=self.pipe.properties().T,
+        )
+
+        self.assertAlmostEqual(pressure_drop, diagnostics.pressure_drop_pa)
+
     def test_connection_derivative_preserves_mass_and_stream_direction(self) -> None:
         internal = self.pipe.properties()
         derivative = self.pipe.derivatives_from_connections(