Question

Francis, Kaplan and propeller turbines fall under the category of:

• A. Reaction turbines
• B. Impulse turbines
• C. Axial flow turbines
• D. Mixed flow turbines

Hint:

Reaction turbines use both pressure and velocity energy of water to generate power, and they are commonly used in large-scale hydroelectric plants.

Answer 1

The Correct Option is A

Francis, Kaplan, and propeller turbines are classified as reaction turbines. In these turbines, the water flows through the runner, and both pressure and kinetic energy are utilized for energy conversion. Reaction turbines are characterized by a change in both pressure and velocity of the water.
- Impulse turbines like Pelton wheels only use the kinetic energy of water and involve a change in velocity but not pressure.
- Axial flow turbines are characterized by the flow of water in the axial direction (parallel to the axis), but this is not exclusive to Francis, Kaplan, or propeller turbines. They are a subset of reaction turbines.
- Mixed flow turbines combine both radial and axial flow, but Francis and Kaplan turbines are specifically reaction turbines.
Thus, Francis, Kaplan, and propeller turbines fall under the category of reaction turbines.