With the aid of detailed numerical flow simulations it has become possible to determine the isolated propeller blade load during a revolution. The load fluctuation on a single propeller blade can be clearly related to the inflow velocity field. Once the time dependent load, and consequently the performance, of a single blade has been identified, knowledge can be obtained on possible overall improvement of the propeller performance. Also the impact on fatigue strength can be addressed in more detail. In this paper the propeller blade load fluctuations have been analyzed for a propeller in behind ship and in a tunnel, operating as bow thruster. The impact of the inflow to the propeller on the occurring loads will be shown. In case of tunnel thruster units, also possible actions to improve the inflow will be analyzed.

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