BASIC MECHANICAL
ENGINEERING
TURBINES
Hydraulic Turbines
1. Impulse Turbine – Pelton Wheel
Potential energy of water is converted
into kinetic energy by a set of nozzles
2. Reaction Turbine – Francis Turbine
The water entering the runner
possesses pressure which in turn does
work on the vanes (blades) by the
principle of reaction
Specific Speed
The speed at which the turbine run
developing unit power under unit head.
Ns = N√P/H5/4
Steam Turbines – Impulse
Turbines
Impulse Turbines
Impulse Turbines – Velocity
Compounding
Impulse Turbines – Pressure
Compounding
Impulse Turbines –
Pressure - Velocity Compounding
Steam Turbines – Reaction
Turbines