对齐PNL0002上游温度并稳定热流体闭合

tests/test_amesim_pnl0002_pnl0003_component.py

@@ -45,6 +45,80 @@ class AmesimPnl0002ComponentTests(unittest.TestCase):
         self.assertGreater(forward, 0.0)
         self.assertLess(reverse, 0.0)
 
+    def test_external_upstream_flow_uses_connected_stream_temperature(self) -> None:
+        pipe = AmesimPnl0002("pnl_2", self.medium, p0=100000.0, T0=350.0)
+        center = pipe.properties()
+        external_pressure = 15.3e6
+        external_temperature = 293.15
+        external_h = self.medium.specific_enthalpy_at_pressure(
+            external_pressure,
+            external_temperature,
+        )
+        pipe.update_stream_outflows(
+            {"port_1": external_h, "port_2": center.h}
+        )
+
+        flow = pipe.port_mass_flow(
+            external_pressure,
+            center.p,
+            center.T,
+            port_name="port_1",
+        )
+        expected = pipe.mass_flow(
+            external_pressure,
+            center.p,
+            external_temperature,
+        )
+        center_temperature_flow = pipe.mass_flow(
+            external_pressure,
+            center.p,
+            center.T,
+        )
+
+        self.assertAlmostEqual(flow, expected)
+        self.assertNotAlmostEqual(flow, center_temperature_flow)
+
+    def test_missing_stream_cache_preserves_center_temperature_fallback(self) -> None:
+        pipe = AmesimPnl0002("pnl_2", self.medium, p0=100000.0, T0=350.0)
+        center = pipe.properties()
+        external_pressure = 15.3e6
+
+        flow = pipe.port_mass_flow(
+            external_pressure,
+            center.p,
+            center.T,
+            port_name="port_1",
+        )
+
+        self.assertAlmostEqual(
+            flow,
+            pipe.mass_flow(external_pressure, center.p, center.T),
+        )
+
+    def test_center_upstream_flow_keeps_center_temperature(self) -> None:
+        pipe = AmesimPnl0002("pnl_2", self.medium, p0=15.3e6, T0=350.0)
+        center = pipe.properties()
+        external_pressure = 1.0e5
+        external_h = self.medium.specific_enthalpy_at_pressure(
+            external_pressure,
+            293.15,
+        )
+        pipe.update_stream_outflows(
+            {"port_1": external_h, "port_2": center.h}
+        )
+
+        flow = pipe.port_mass_flow(
+            external_pressure,
+            center.p,
+            center.T,
+            port_name="port_1",
+        )
+
+        self.assertAlmostEqual(
+            flow,
+            pipe.mass_flow(external_pressure, center.p, center.T),
+        )
+
     def test_pressure_flow_residuals_use_two_port_resistances(self) -> None:
         pipe = AmesimPnl0002("pnl_2", self.medium, p0=100000.0, T0=293.15)
         center = pipe.properties()