Tutorial $01$

Axial flow turbines

QUESTION $01$

Consider an impulse gas turbine in which gas enters at pressure $\frac{1}{45\mathrm{.}2}\frac{?}{\text{b}\text{a}\text{r}}$ and leaves at $1\mathrm{.}03$ bar. The turbine inlet temperature is $1000$ K and isentropic efficiency of the turbine is $0\mathrm{.}88.$ If mass flow rate of air is $28k\frac{g}{s},$ nozzle angle at outlet is $578,$ and absolute velocity of gas at inlet is $140\frac{m}{s},$ determine the gas velocity at nozzle outlet, whirl component at rotor inlet and turbine work output. Take, g $\frac{1}{41\mathrm{.}33},$ and Cpg $\frac{1}{41\mathrm{.}147}k\frac{J}{k}gK$