The degree of reaction of an axial flow turbine is the ratio of isentropic temperature drop in a blade row to the

A Adiabatic temperature drop in the stage
B Total temperature drop
C Total temperature drop in the stage
D Total adiabatic temperature drop

Correct Answer: Total temperature drop in the stage

The degree of reaction of an axial flow turbine is the ratio of isentropic temperature drop in a blade row to the Total temperature drop in the stage.
The degree of reaction contributes to the stage efficiency and thus used as a design parameter. Stages having 50% degree of reaction are used where the pressure drop is equally shared by the stator and the rotor for a turbine.
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#Mechanical Engineering #Compressors #Gas Turbines And Jet Engines

Related Questions

The isentropic enthalpy drop in moving blade is two-third of the isentropic enthalpy drop in fixed blades of a turbine. The degree of reaction will be
A 0.4
B 0.56
C 0.67
D 1.67
A turbine is said to have an axial discharge when the steam leaves the blade tip at _________ to the direction of the blade motion.
A 60°
B 90°
C 180°
D 270°
A pitched-blade turbine draws __________ a straight blade turbine.
A Less power than
B More power than
C Same power as
D Data insufficient to predict
The ratio of the useful heat drop to the isentropic heat drop is called
A Condenser efficiency
B Nozzle efficiency
C Boiler efficiency
D Vacuum efficiency
The ratio of total useful heat drop to the total isentropic heat drop, is called
A Stage efficiency
B Internal efficiency
C Rankine efficiency
D None of these
In axial flow compressor, exit flow angle deviation from the blade angle is a function of
A Blade camber
B Blade camber and incidence angle
C Space-chord ratio
D Blade camber and space-chord ratio
Applying a pressure drop across a capillary results in a volumetric flow rate 'Q' under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is
A $$\frac{{\text{Q}}}{2}$$
B $$\frac{{\text{Q}}}{4}$$
C $$\frac{{\text{Q}}}{8}$$
D $$\frac{{\text{Q}}}{{16}}$$
The average temperature for the first 4- days of a week is 40.2-degree Celcius and that of the last 4 days is 41.3-degree Celcius If the average temperature for the whole week is 40.6-degree Celcius then the temperature on the fourth day is-
A 38.5 Degree Celcius
B 40.8 Degree Celcius
C 41.3 Degree Celcius
D 41.8 Degree Celcius
The ratio of the isentropic heat drop to the heat supplied, is called
A Reheat factor
B Stage efficiency
C Internal efficiency
D Rankine efficiency
The degree of reaction in an axial flow compressor is defined as the ratio of static enthalpy rise in the
A Rotor to static enthalpy rise in the stator
B Stator to static enthalpy rise in the rotor
C Rotor to static enthalpy rise in the stage
D Stator to static enthalpy rise in the stage

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