Computational Analysis of Cavitating Marine Propeller Performance using OpenFOAM
Konferensbidrag (offentliggjort, men ej förlagsutgivet), 2015
In this paper, numerical results, based on implicit LES and
transport equation mass transfer modelling approach, submitted to the Second International Workshop on
Cavitating Propeller Performance at the Fourth International
Symposium on Marine Propulsors (SMP’15) are presented.
The numerical simulations are performed using
OpenFOAM. The present work is focused on the second
task of the workshop, Propeller in oblique flow inside
tunnel in wetted and cavitating conditions. We summarise
results from the three different operating conditions given in the task, where the experimental data of one condition is
revealed, and the two other conditions are put forward as
blind tests to workshop participants. For the condition
where experimental data is known, we see good agreement
for the forces in wetted conditions that slightly deteriorate in cavitating conditions. Cavitation extent is over predicted, where mid-span bubbly cavitation in the experiments is predicted as a sheet cavity; cavitation in the tip region does however seem reasonable. This is also likely the reason for the larger error in force prediction. A limited mesh resolution study has been performed.