def test_TRP_example(self):
# Slide 57-51 from Ideal Rocket Motor lecture from Thermal Rocket Propulsion course are used as example (Zandbergen)
expected = 3021
gamma = 1.3
R = 390.4
T_chamber = 3400
AR_exit = 49
res = IRT.exit_velocity(AR_exit=AR_exit,
T_chamber=T_chamber,
R=R,
gamma=gamma)
self.assertAlmostEqual(
res, expected, -1) # 4 digits accuracy (-1, rounding difference)
def test_simple_input(self):
expected = 1.0801234497346432 # Manually calculated
# area ratio of 1 means the mach number is 1
res = IRT.exit_velocity(AR_exit=1, T_chamber=1, R=1, gamma=1.4)
self.assertEqual(res, expected)