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?

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    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

     

    Kumar59 Answered on 24th October 2019.
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