Rotor Cylinder

Figure 07.05.05 shows a representation of a turbine T. Initially, this is shown as a round cylinder. At the top left hand side of the diagram, a vertical cross-section is shown, and to the right of that is the view from above. The diagram at the bottom of the Figure shows the inside wall of the cylinder opened out and laid on a flat surface. The cylinder in this example has a radius of 16 cm (R16) and a circumference of 1 metre. Circular pipes are positioned vertically around the circumference to act in a similar way to turbine-blades (TS shown in blue). Here, twelve of these pipes are shown, each parallel to the system axis and running in a straight line from bottom to top.

A 6 m/s jet of water enters the bottom of these pipes at an upward angle of 30 degrees. Due to the rotation of the cylinder drum, the water moves along the diagonal path A to B. As explained earlier, the water has a horizontal velocity component marked in red in the diagram as V6, and because of the angle of entry of the water, there is a vertical speed of about 3.5 m/s (shown in green and marked as V3.5). The water flowing in these pipes actually flows in a spiral path diagonally upwards, following the path shown by the blue line running from A to B. If the height of the cylinder is 24 cm (H24), then the water moves around through the whole of sector S150 during its upward flow through the vertical pipes. 