(Solved): [30] Q3) Air at 200kPa and 350K enters an adiabatic nozzle at low velocity. At the outlet of the ...

[30] Q3) Air at $$200\mathrm{kPa}$$ and $$350\mathrm{K}$$ enters an adiabatic nozzle at low velocity. At the outlet of the nozzle the pressure is measured as $$150\mathrm{kPa}$$. (Consider constant thermophysical properties: $$Cp=1.008\mathrm{kJ}/\mathrm{kg}$$ $$k,k=1.398)$$ Consider air as ideal gas under these conditions. [5] a) Determine the maximum possible velocity at the nozzle outlet. [5] b) What would be the exit velocity for a nozzle with efficiency of $$0.9$$ ? [10] c) Calculate and plot in EXCEL the air temperature at the nozzle outlet for a range of nozzle efficiencies btw $$0.8$$ and $$1.0$$. [10] d) Calculate and plot in EXCEL the entropy generation inside the nozzle, for a range of nozzle efficiencies btw $$0.8$$ and $$1.0$$.