对齐Amesim氦气PR物性与PNVO流量

tests/test_amesim_helium_medium.py

@@ -18,7 +18,7 @@ from tests.test_system_xml_protocol import physical_port
 
 
 class AmesimHeliumPengRobinsonMediumTests(unittest.TestCase):
-    def test_uses_shared_peng_robinson_eos_and_committed_caloric_constants(
+    def test_uses_amesim_2404_peng_robinson_and_nasa_constants(
         self,
     ) -> None:
         medium = AmesimHeliumPengRobinsonMedium()
@@ -32,11 +32,11 @@ class AmesimHeliumPengRobinsonMediumTests(unittest.TestCase):
         self.assertEqual(medium.SUBSTANCE_ID, "helium")
         self.assertEqual(medium.PROPERTY_METHOD_ID, "peng_robinson")
         self.assertAlmostEqual(medium.R_gas, HELIUM_PR.specific_gas_constant)
-        self.assertEqual(medium.cp_ref, 5193.0)
-        self.assertEqual(medium.cv, 3116.0)
-        self.assertEqual(medium.cp_at_temperature(400.0), 5193.0)
-        self.assertEqual(medium.cv_at_temperature(400.0), 3116.0)
-        self.assertAlmostEqual(medium.gamma, 5193.0 / 3116.0)
+        self.assertEqual(medium.cp_ref, 2.5 * medium.R_gas)
+        self.assertEqual(medium.cv, 1.5 * medium.R_gas)
+        self.assertEqual(medium.cp_at_temperature(400.0), 2.5 * medium.R_gas)
+        self.assertEqual(medium.cv_at_temperature(400.0), 1.5 * medium.R_gas)
+        self.assertAlmostEqual(medium.gamma, 5.0 / 3.0)
         self.assertAlmostEqual(density, HELIUM_PR.density(pressure, temperature))
         self.assertAlmostEqual(
             medium.pressure(density * volume, temperature, volume),
@@ -44,7 +44,7 @@ class AmesimHeliumPengRobinsonMediumTests(unittest.TestCase):
             delta=pressure * 1.0e-12,
         )
 
-    def test_constant_caloric_model_and_sutherland_viscosity_complete_contract(
+    def test_nasa_caloric_reference_and_sutherland_viscosity_complete_contract(
         self,
     ) -> None:
         medium = AmesimHeliumPengRobinsonMedium()
@@ -53,8 +53,14 @@ class AmesimHeliumPengRobinsonMediumTests(unittest.TestCase):
         internal_energy = medium.specific_internal_energy(temperature)
         enthalpy = medium.specific_enthalpy(temperature)
 
-        self.assertEqual(internal_energy, 3116.0 * temperature)
-        self.assertEqual(enthalpy, 5193.0 * temperature)
+        self.assertEqual(
+            internal_energy,
+            medium.R_gas * (1.5 * temperature - 745.375),
+        )
+        self.assertEqual(
+            enthalpy,
+            medium.R_gas * (2.5 * temperature - 745.375),
+        )
         self.assertEqual(
             medium.temperature_from_internal_energy(internal_energy),
             temperature,
@@ -66,6 +72,56 @@ class AmesimHeliumPengRobinsonMediumTests(unittest.TestCase):
         self.assertAlmostEqual(medium.dynamic_viscosity(293.15), 1.96e-5)
         self.assertEqual(medium.sutherland_constant, 79.4)
 
+    def test_pressure_transport_enthalpy_includes_peng_robinson_departure(
+        self,
+    ) -> None:
+        medium = AmesimHeliumPengRobinsonMedium()
+        pressure = 13_839_965.0
+        temperature = 287.7322
+
+        ideal_enthalpy = medium.specific_enthalpy(temperature)
+        transport_enthalpy = medium.specific_enthalpy_at_pressure(pressure, temperature)
+
+        self.assertGreater(
+            transport_enthalpy,
+            ideal_enthalpy,
+        )
+        self.assertAlmostEqual(
+            medium.temperature_from_pressure_enthalpy(pressure, transport_enthalpy),
+            temperature,
+            delta=1.0e-8,
+        )
+
+        density = medium.density(pressure, temperature)
+        volume = 0.01
+        properties = medium.properties_from_mU(
+            density * volume,
+            density
+            * volume
+            * medium.specific_internal_energy_at_pressure(pressure, temperature),
+            volume,
+        )
+        self.assertAlmostEqual(properties.p, pressure, delta=pressure * 1.0e-10)
+        self.assertAlmostEqual(properties.T, temperature, delta=1.0e-8)
+        self.assertAlmostEqual(
+            properties.h,
+            transport_enthalpy,
+            delta=2.0e-8,
+        )
+
+    def test_amesim_2404_real_gas_isentropic_factor_reference(self) -> None:
+        medium = AmesimHeliumPengRobinsonMedium()
+
+        self.assertAlmostEqual(
+            medium.isentropic_density_pressure_factor(
+                15_201_996.778497815,
+                292.3997890954483,
+                405_072.8123335606,
+            ),
+            0.5807873871273339,
+            delta=1.0e-12,
+        )
+
     def test_definition_maps_local_selector_to_amesim_fluid_and_eos_codes(
         self,
     ) -> None: