Francis Turbine

1. Presenter’s Group Name
Francis Tube
Group C
Head :
Anees Ur Rehman
147-FET/BSCE/F17

2. Agenda
 To Provide Basic Concept about Francis Turbine

3. What is a Turbine?
A machine for producing continuous power in which a wheel or rotor, typically fitted
with vanes, is made to revolve by a fast-moving flow of water, steam, gas, air, or other
fluid.

4. Types Based On Energy Used
Impulse Turbine
Only Kinetic Energy of Water is used to drive turbine.
 Reaction Turbine
Kinetic Energy as well as Potential energy is used
to drive turbine. i.e Francis Turbine

5. Mechanism

6.  This is a reaction turbine which works because of inward flow of water. The most important portion
of this turbine is its runner which contains large number closely attached complex shaped blades
 When water hit the blades radially it exerts pressure on both sides of the blades but due to the
curve on the blade the force on one side of the blades remains higher than the force of other side
of the blade.
Mechanism

7. Mechanism
 When water leave the blade axially it generate the impulse force due to the
slightly outward shape of the blades at the bottom (bucket shaped end)

8.  The area spiral casing is not uniform. It is due to the fact that the speed of
water decreases gradually and decreasing area of the spiral case can keep
the speed of water uniform
Mechanism

9. Advantages
 It is mostly used turbine all over the world as its efficiency
is greater than all other turbines.
 There is an effective use of water pressure and velocity

10. Disadvantages
 Its cost is very high
 Its operation is simple but the design is very complex

12. http://www.learnengineering.org/2014/01/how-does-
francis-turbine-work.htm
https://www.turbinesinfo.com/what-is-francis-turbine-
how-francis-turbine-works/
References