Máquinas eólicas de eje vertical

Sitios Amigos

Parametros del rotor Savonius. Investigacion.

It is possible to identify few geometrical parameters which should modify sensibly the expected performances represented in figure 3. Table 1 collects the main data which lead to a maximal power coefficient for a rotor of Savonius type. The combination of these results should allow to obtain an optimum Savonius rotor.

In order to verify these hypothesis, a prototype of such a rotor was realized. One can notice that if a double-stepped rotor (each step being staggered from the other with a 90° angle) ensures a sufficient stability of the mechanical torque (figure 4), a higher number of steps is not necessary and should uselessly loads the rotor and raise its inertia. In the same way, a higher number of paddles than 2 no longer raises the efficiency of the rotor, and decreases it in most cases.