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Question No: $03$

This is a subjective question, hence you have to write your answer in the Text$-$Field given below.

Steam enters a single stage impulse turbine. The diameter of the rotor is $1\mathrm{.}59m$ and runs at $2314rpm.$ The mass flow rate of steam is $3k\frac{g}{s}.$ The turbine produces $303\mathrm{.}3kW.$ Nozzle angle is $15.$ Maximum diagram efficiency is $0\mathrm{.}87.$ Blade velocity coefficient is $1.$ Ratio of the cosines of the blade angles is $0\mathrm{.}9.$ Determine the following:

$[8]$

a$.$ Linear velocity of the blade

b$.$ Change of tangential component of velocity

c$.$ Blade$-$steam velocity ratio

d$.$ Steam velocity at inlet

e$.$ Actual blade efficiency

f$.$ Driving thrust

g$.$ Draw the velocity diagram and answer the following:

i$.$ Absolute velocity of steam at exit

ii$.$ Angle of relative velocity at inlet

iii. Angle of relative velocity at exit

iv$.$ Angle of absolute velocity at exit