What are the 5 main components of a Francis turbine?

Main Components of Francis Turbine

• Spiral Casing. Spiral casing is the inlet medium of water to the turbine.
• Stay Vanes. Stay vanes and guide vanes guides the water to the runner blades.
• Guide Vanes.
• Runner Blades.
• Draft Tube.

How work is done in Francis turbine?

In a Francis turbine, runner blades are divided into 2 parts. The lower half is made in the shape of a small bucket so that it uses the impulse action of water to rotate the turbine. The upper part of the blades uses the reaction force of water flowing through it. These two forces together make the runner rotate.

What is Francis reaction turbine?

The Francis turbine is a type of water turbine. It is an inward-flow reaction turbine that combines radial and axial flow concepts. Francis turbines are the most common water turbine in use today, and can achieve over 95% efficiency.

How do you calculate power output in Francis turbine?

To calculate electrical power or turbine power, you have to know the hydraulic power, which depends on the flow and how far the water falls. So, the hydraulic output power is equal to gravity times flow (in litres per second) times the pressure or height difference (in metres of water column).

What type of turbine is a Francis turbine?

radial inward flowing reaction turbine
∴ Francis turbine is a radial inward flowing reaction turbine.

What is the head of Francis turbine?

Detailed Solution. Explanation: Francis turbine is a medium head turbine and they are used generally for medium head application (24 to 180 m).

Why Francis turbine is a reaction turbine?

This reaction force (like Newton’s third law) is what causes power to be transferred from the water to the turbine’s shaft, maintaining rotation. Because the turbine moves as a result of this reaction force, Francis turbines are known as reaction turbines.