Air flows through a converging nozzle and then a

length of insulated duct. The air is supplied from a tank

where the temperature is constant at 59F and the pressure is

variable. The outlet end of the duct exhausts to atmosphere.

When the exit flow is just choked, pressure measurements

show the duct inlet pressure and Mach number are 53.2 psia

and 0.30. Determine the pressure in the tank and the temperature, stagnation pressure, and mass flow rate of the

outlet flow, if the tube diameter is 0.249 in. Show on a Ts

diagram the effect of raising the tank pressure to 100 psia.

Sketch the pressure distribution versus distance along the

channel for this new flow condition.

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