Show all publications

A Lagrangian analysis of scale effects on sheet cavitation inception

AuthorsRijsbergen, M.X. van, Beelen, S.
Conference/JournalSixth International Symposium on Marine Propulsors (SMP’19), Rome, Italy
Date26 May 2019
Sheet cavitation on foils and propellers is often initiated by free-stream bubbles. Consequently, scale effects on cavitation inception occur due to differences in the bubble spectrum (size vs. concentration), propeller diameter and rotation rate. To better understand the sensitivities, a 2D Lagrangian tracking method is used to compute the trajectories and radial dynamics of free-stream bubbles that cause cavitation on a blade section. Systematic series of conditions are computed by varying the initial radius and the initial position of a bubble. It is shown that the range of initial bubble radii that can cause cavitation decreases from 0.03 to at least 600 µm for a full-scale propeller, to 5 – 160 µm for a small propeller model. If sufficient bubbles in this size range are present in a cavitation facility, this does not explain why sheet cavitation inception is often inhibited on model-scale propellers. However, the bubble dynamics computations did show significantly less bubble growth on the small propeller model.


Contact person photo

Martijn van Rijsbergen

Senior Researcher

You will need an account to view this content

To view this content you will need a login account. If you already have an account you can sign in below. If you want an account then you can create one.

propeller and cavitation