Axial Flow Turbine Generator

Turbine generator has some types of turbines, one of them is type turbine based on fluid flow such as axial flow turbine generator. Axial flow turbine generator is the turbine which has direction of fluid flow parallel to axis of turbine shaft. Axial flow turbine is generally used for large capacity and power because it has more advantageous than radial flow turbine generator as follows:

1. Axial flow turbine has better efficiency than radial flow turbine.
2. Comparison of pressure (rp) can be made higher.
3. Construction of axial flow turbine generator is lighter and does not require large room.

Figure 1: Axial Flow Turbine Generator
(Source: Gas Turbine Engineering Handbook - Meherwan P. Boyce)

Axial flow turbine can be classified based on energy conversion system as follow:

1. Axial reaction turbine

Axial reaction turbine is axial turbine which has expansion process not only occur in motion blade but also expanded evenly so decrease in heat content is distributed evenly on all level.

2. Axial action (impulse) turbine

Axial action (impulse) turbine is axial turbine which has expansion process occur only in stationary blade and velocity energy is converted into mechanism energy in turbine blades without occurrence of expansion in motion blade.