Consider a converging nozzle with a low velocity at the inlet and sonic velocity at the exit plane. Now the nozzle exit diameter is reduced by half while the nozzle inlet temperature and pressure are maintained the same. The pressure at nozzle exit will
A)remain the same.
B)double.
C)quadruple.
D)go down by half.
E)go down to one-fourth.

Question

Quizplus · Accepted Answer

The pressure at the nozzle exit will remain the same because the mass flow rate through the nozzle is constant. The reduction in exit diameter will increase the velocity of the flow, but the pressure will remain the same.

Consider a Converging Nozzle with a Low Velocity at the Inlet