Consider gas flow through a converging-diverging nozzle. Of the five following statements, select the one that is incorrect:
(a) The fluid velocity at the throat can never exceed the speed of sound.
(b) If the fluid velocity at the throat is below the speed of sound, the diversion section will act like a diffuser.
(c) If the fluid enters the diverging section with a Mach number greater than one, the flow at the nozzle exit will be supersonic.
(d) There will be no flow through the nozzle if the back pressure equals the stagnation pressure.
(e) The fluid velocity decreases, the entropy increases, and stagnation enthalpy remains constant during flow through a normal shock.
This question was answered on: Jul 11, 2017
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