Kaplan Turbine Working Principle:
Kaplan Turbine Working Principle – The water from the scroll casing flows over the guide vanes. It is deflected through an angle of 90° in between guide vanes and runner. Then it flows axially into the runner. The blades are shaped such that water flows axially in the runner. It can be adjusted to any desired angle so that the area of flow passage can also be varied. This adjustment can be carried out automatically by a servomotor governor mechanism.
The force exerted by the fluid on the blades causes the runner shaft to rotate. This rotation is transmitted to the generator which is coupled to the runner shaft. After passing through the runner, the water enters the tail race through a draft tube.