修正动态管与阀门诊断输出

tests/test_amesim_pnvo001_fixed_component.py

@@ -54,6 +54,25 @@ class AmesimPnvo001FixedOpeningComponentTests(unittest.TestCase):
 
         self.assertEqual(valve.mass_flow(500000.0, 100000.0), 0.0)
 
+    def test_closed_opening_only_zeroes_reported_gas_velocity(self) -> None:
+        valve = AmesimPnvo001FixedOpening("valve_1", self.medium, opening=0.0)
+        valve.port_2.p = 500000.0
+        valve.port_3.p = 100000.0
+
+        closed = valve.component_result_values()
+        self.assertGreater(closed["cm"], 0.0)
+        self.assertEqual(closed["gasvel"], 0.0)
+
+        valve.opening = 7.0e-15
+        roundoff_closed = valve.component_result_values()
+        self.assertEqual(roundoff_closed["gasvel"], 0.0)
+        self.assertEqual(roundoff_closed["cm"], closed["cm"])
+
+        valve.opening = 1.0e-9
+        genuinely_open = valve.component_result_values()
+        self.assertNotEqual(genuinely_open["gasvel"], 0.0)
+        self.assertEqual(genuinely_open["cm"], closed["cm"])
+
     def test_mass_flow_is_bidirectional_by_pressure_order(self) -> None:
         valve = AmesimPnvo001FixedOpening("valve_1", self.medium, opening=0.5)