Correct Answer - Option 1 : Kaplan turbine
Concept:
Kaplan turbine:
- It is a type of axial flow turbine.
- When the vanes on the hub are adjustable then the turbine is known as the Kaplan turbine,
- Kaplan turbine is a low head axial flow turbine.
-
In a Kaplan turbine, the velocity of flow through the rotor is constant along the radius.
-
Kaplan turbine is a propeller turbine in which the vanes fixed on the hub are adjustable.
Classification of turbines on various bases is given in the table below:
|
Flow
|
Energy
|
Head
|
Specific speed
|
Example
|
|
Tangential
|
Impulse
|
High
(300 m and above)
|
Low
(0 – 60 RPM)
|
Pelton Wheel turbine
|
|
Radial
|
Reaction
|
Medium
(30 m to 300 m)
|
Medium
(60 – 300) RPM
|
Francis turbine
|
|
Axial
|
Reaction
|
Low
(less than 30 m)
|
High
|
|
|
(300 – 600) RPM
|
Propeller turbine
|
|
(600 – 1000) RPM
|
Kaplan turbine
|
