A single-stage impulse turbine with a diameter of 120 cm runs at 3000 rpm. If the blade speed ratio is 0.42, what is the inlet velocity of steam?
A single-stage impulse turbine with a diameter of 120 cm runs at 3000 rpm. If the blade speed ratio is 0.42, what is the inlet velocity of steam?
Blade speed ratio of impulse turbine is given as (blade velocity/steam velocity at inlet).Here blade velocity is \[V=\frac{\pi D N}{60}
\\=\frac{\pi\times 120 \times 10^{-2}\times 3000}{60}
\\=188.49\;m/s\]
Therefore inlet velocity of steam will be \[\frac {188.49}{0.42}\]
\[=448.79\]
\[\approx 450\;m/s\]
