Air flows through a nozzle at a steady rate. at the inlet the density is 2.21 kg/m3 and the velocity is 20 m/s. at the exit, the density is 0.762 kg/m3 and the velocity is 150 m/s. if the inlet area of the nozzle is 60 cm2, determine (a) the mass flowrate through the nozzle and (b) the exit area of the nozzle.

To solve the problem, it is necessary to apply the concepts related to the change of mass flow for both entry and exit.

The general formula is defined by

Where,

mass flow rate

Density

V = Velocity

Our values are divided by inlet(1) and outlet(2) by

PART A) Applying the flow equation we have to

PART B) For the exit area we need to arrange the equation in function of Area, that is

Therefore the Area at the end is

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