Air enters a 5- by 5-cm square duct at V1 900 ms and T1 300 K. The

Question:

Air enters a 5- by 5-cm square duct at V1 900 ms and T1 300 K. The friction factor is 0.02. For what length duct will the flow exactly decelerate to Ma 1.0? If the duct length is 2 m, will there be a normal shock in the duct? If so, at what Mach number will it occur?