7. Propeller modeling

Because of the type of modeling we've chosen, we can't take any blade vibrations into account. The propeller is therefore assumed to be dimensionally stable.

The inertia of a propeller is represented by an inertia disk I _h . It takes into account the inertia of the material making up the propeller plus 25% in the case of a marine propeller, to account for water displacement.

The propeller is discretized into a succession of d m elements whose mass is located at a constant distance r from the axis of rotation (figure 42 ). The elementary inertia of each element is therefore r ^...