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Calculate the mean blade velocity of a Parson’s reaction turbine, if the steam leaves the nozzle with an absolute velocity of 320 m/s. Take the nozzle angle as 20° and the turbine works at maximum efficiency.

Calculate the mean blade velocity of a Parson’s reaction turbine, if the steam leaves the nozzle with an absolute velocity of 320 m/s. Take the nozzle angle as 20° and the turbine works at maximum efficiency. Correct Answer 301 m/s

Given, C1 = 320 m/s, α = 20° We know that, when a reaction turbine works at maximum efficiency Cbl/C1 = cos⁡α Cbl = cos⁡α*C1 = cos⁡20*320 = 300.7 m/s ≈ 301 m/s.

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