Mumbai University > Mechanical Enginerring > SEM 6 > Thermal and Fluid Power Engineering

Marks: 8M

The following particulars refer to a single row impulse turbine: Mean diameter of blade ring = 2.5 m ; speed = 3000 rpm ; nozzle angle = 20°; ratio of blade velocity to steam velocity = 0.4; blade friction factor = 0.8 ; blade angle at exit = 3° less than that at inlet; steam flow =36,000 kg/hr.

Draw velocity diagram for moving blade and estimate (a) power developed ; (b) blade efficiency; and (c) steam consumption in kg/kW hr.

To find 1) Power developed 2) Blade efficiency 3) Steam consumption

$C_{w1}=C_1 cos \alpha\\ c_b = \frac{\pi D_mN}{60} = 392.7 …