Electrical Engineering MCQ
In Kaplan turbine runner, the number of blades is generally of the order of:
- 1-2
- 3-6
- 6-12
- 12-16
Correct answer: 2. 3-6
Explanation: The Kaplan turbine is a propeller-type water turbine which has adjustable blades.
Kaplan turbine was developed in 1913 by Austrian professor Viktor Kaplan, who combined automatically adjusted propeller blades with automatically adjusted wicket gates to achieve efficiency over a wide range of flow and water level.
The runner, which is responsible of the conversion of hydraulic energy to mechanical energy, is the most vulnerable component since it is exposed to the load due the water pressure.
The runner has three to six blade of airfoil shape; the number of blade depends of the specific speed.