Two parameters can be fixed during the cavitation experiments: cavitation number and Strauhal number. However, scale effects should be taken into account for marine propeller blades in the wake of a ship's hull. Flexural vibration of the blades in an unsteady flow cause changes in the pressure distribution about blade sections and their Lift oscillations. The magnitude of vibration depends on cavity length which is a function of section Lift, as well as cavity separation position. As a result, this length depends on Reynolds and Weber numbers which are defined by the blade dimensions. Numerical analysis of such scale effects is based on a combination of two- and three-dimensional hydroelastic models utilizing potential flow theory with an implicit account of viscous effects.

This content is only available via PDF.
You can access this article if you purchase or spend a download.