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What should be the ratio of blade speed to absolute velocity of steam leaving the nozzle for a Parson’s reaction turbine to work at maximum efficiency?

What should be the ratio of blade speed to absolute velocity of steam leaving the nozzle for a Parson’s reaction turbine to work at maximum efficiency? Correct Answer cos⁡α

In a Parson’s reaction turbine, the degree of reaction is 50% and the moving and fixed blades are symmetrical. This turbine works at maximum possible efficiency when the ratio of blade speed to absolute velocity of steam leaving the nozzle is equal to cosine of nozzle angle.

Related Questions

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