Question
Download Solution PDFThe degree of reaction for an impulse steam turbine is:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Degree of reaction is the ratio of enthalpy drop in the rotor to the enthalpy drop in a stage.
i.e. \({\rm{R}} = \frac{{{\rm{Static\;enthalpy\;drop\;or\;rise\;in\;rotor}}}}{{{\rm{Stagnation~enthalpy\;drop\;or\;rise\;in\;stage}}}}\)
Or, \(R = \frac{{static\;pressure\;drop\;or\;rise\;in\;rotor}}{{stagnation\;pressure\;drop\;or\;rise\;in\;stage}}\)
In the case of impulse turbine, there is no change in the enthalpy in the rotor, so the degree of reaction is zero.
R = 0.
And for Parson’s turbine or 50% reaction turbine R = 0.5 and for Hero’s turbine R = 1.Last updated on May 28, 2025
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