Question

If the enthalpy difference across the stator in a hydraulic turbine machinery is the same as the enthalpy difference across the rotor in a single stator-rotor arrangement, the degree of reaction is: ________

Answer 1

The degree of reaction in a hydraulic turbine machinery is 50% if the enthalpy difference across the stator is the same as the enthalpy difference across the rotor in a single stator-rotor arrangement.

Step-by-step explanation:

The degree of reaction in a hydraulic turbine machinery is a measure of the distribution of enthalpy difference between the stator and the rotor. If the enthalpy difference across the stator is the same as the enthalpy difference across the rotor in a single stator-rotor arrangement, then the degree of reaction is 50%. This means that half of the enthalpy difference is absorbed by the stator and the other half is absorbed by the rotor.

Answer 2

The degree of reaction in a hydraulic turbine with equal enthalpy differences across the stator and the rotor is 0.5 or 50%.

Step-by-step explanation:

If the enthalpy difference across the stator in a hydraulic turbine machinery is the same as the enthalpy difference across the rotor in a single stator-rotor arrangement, the degree of reaction would be 0.5 or 50%. The degree of reaction is defined as the ratio of the enthalpy drop in the rotor to the total enthalpy drop in the stage (both stator and rotor). When the enthalpy drop across the stator is equal to that across the rotor, this indicates that the energy conversion is evenly split between the two, which gives a degree of reaction of 0.5. This concept is an important part of turbine design, as it affects the efficiency and performance of the turbine.