The angles in the absolute system are noted by alpha (α) and the angles in the relative system are noted by beta (β). Axial and tangential components of both absolute and relative velocities are shown in the figure. Static and

 ...

A single-stage impulse turbine is shown in Figure
There is no change in the static pressure through the rotor of an

 ...

When the pressure drop available is large, it cannot all be used in one turbine stage. A single-stage utilizing a large pressure drop will have an impractically high peripheral speed of its

 ...

There are two major problems in velocity-compounded stages:
• The nozzles have to be of the convergent-divergent type for

 ...

The blade-to-gas speed ratio parameter (velocity ratio) σ = u/c2. Efficiencies of the turbine stages can also be plotted against this ratio. Such plots for some impulse and reaction stages are

 ...

The losses occur in an actual turbine due to disc and bearing friction. Figure shows the energy flow diagram for the impulse stage of an axial turbine. Numbers in brackets indicate the order of energy or loss corresponding to 100 units of isentropic work (h01 –

 ...

Figure shows two reaction stages and the variation of pressure and velocity of the gas in them. The gas pressure decreases continuously over both fixed and moving rows of blades. Since the

 ...