What are the classifications of turbines?
Types of Turbines Based on Energy Exchange between the water and the Machine
- Impulse Turbines.
- Reaction Turbines.
- Radial Flow Turbine.
- Tangential or Peripheral Flow Turbines.
- Axial Flow Turbines.
- Mixed Flow Turbines.
- Low Head Turbines.
- Medium Head Turbines.
What is impulse turbine definition?
: a turbine in which the rotor is driven by fluid jets impinging directly against the blades — compare reaction turbine.
What is principle of impulse turbine?
Impulse turbine work on the principle of Newton’s second law as the resulting change in momentum sets buckets and wheel into rotary motion and thus mechanical energy is made available at the turbine shaft. The fluid jet leaves the runner with a reduced energy.
What is turbine and classification of turbine?
Pelton turbine, a type of impulse water turbine. Francis turbine, a type of widely used water turbine. Kaplan turbine, a variation of the Francis Turbine. Turgo turbine, a modified form of the Pelton wheel. Cross-flow turbine, also known as Banki-Michell turbine, or Ossberger turbine.
What is difference between impulse and reaction turbine?
The main differences between Impulse and Reaction turbines are, all hydraulic energy is converted into kinetic energy by a nozzle in the Impulse turbine and whereas In Reaction turbine Only some amount of the available energy is converted into kinetic energy.
What is meant by impulse and reaction turbine?
Impulse turbines change the direction of flow of a high velocity fluid or gas jet. Reaction turbines develop torque by reacting to the gas or fluid’s pressure or mass. The pressure of the gas or fluid changes as it passes through the turbine rotor blades.
What is the use of impulse turbine?
It is used worldwide to produce electrical energy in a number of hydro-power plants. Turbochargers in automobiles uses the pressure energy of exhaust gases through impulse turbine. Where hot and pressurized gases coming out of exhaust are converted into high velocity jet by passing them through nozzle.
What are the types of impulse turbine?
The two main types of impulse turbine are Pelton and cross-flow turbines. The Pelton turbine was invented by American inventor Lester Allan Pelton in the 1870s, A Pelton wheel has one or more free jets discharging water into an aerated space and impinging on the buckets of a runner.
Why it is called impulse turbine?
Unlike other types of turbines which are reaction turbines, the Pelton turbine is known as an impulse turbine. This simply means that instead of moving as a result of a reaction force, water creates some impulse on the turbine to get it to move.
What is compounding of impulse turbines?
Compounding is done to reduce the rotational speed of the impulse turbine to practical limits. Compounding is achieved by using more than one set of nozzles, blades, rotors, in a series, keyed to a common shaft; so that either the steam pressure or the jet velocity is absorbed by the turbine in stages.
What is an impulse turbine?
Impulse Turbine. An impulse turbine is a type of steam turbine where the rotor derives its rotational force from the impact force, or the direct push of steam on the blades.
What is impulse Turbo?
In an impulse turbine, the fluid is forced to hit the turbine at high speed. Artwork: A Pelton water wheel is an example of an impulse turbine. It spins as one or more high-pressure water jets (blue), controlled by a valve (green), fire into the buckets around the edge of the wheel (red).
What is the degree of reaction in a turbine?
In case of turbines, both impulse and reaction machines, Degree of reaction (R) is defined as the ratio of energy transfer by the change in static head to the total energy transfer in the rotor i.e. . Oct 29 2019
What are the types of steam turbines?
The major types of steam turbines are condensing and non-condensing, extraction, reheat turbines, and several varieties of multiflow turbines.