On cavitation aggressiveness and cavitation erosion on marine propellers using a URANS Method

On cavitation aggressiveness and cavitation erosion on marine propellers using a URANS Method

Melissaris, Themistoklis (TU Delft Ship Hydromechanics and Structures; Wärtsilä Netherlands B.V.)
Bulten, Norbert (Wärtsilä Netherlands B.V.)
van Terwisga, T.J.C. (TU Delft Ship Hydromechanics and Structures; Maritime Research Institute Netherlands (MARIN))

Katz, Joseph (editor)

2018

Cavitation occurrence on the propeller blades may have severe effects, such as cavitation noise, vibrations in the aft ship, and material damage on propellers or rudder. While noise and vibrations affect comfort and stability, cavitation erosion might lead to a significant reduction of the propeller efficiency and structural integrity. Cavitation erosion prediction is therefore extremely important. However, it still remains a challenging issue, especially on marine propeller applications where computational time limit in a practical propeller design environment is imperative. This paper focuses on cavitation aggressiveness on the propeller blades of the KCD-193 model propeller. Cavitation intensity is assessed by the potential power density. Following the idea that the potential power is the basis of the cavitation aggressiveness, we found that by computing the potential power of the first layer of cells, in contact with the blade surface, it gives a useful first estimate of the regions that are exposed to a high erosion risk. The use of a mean field pressure, which is the time average of the local pressure, as the driving pressure behind the cavity collapse, was necessary to get a good match with experimental observations.

Cavitation aggressiveness
model propeller
potential power
driving pressure

http://resolver.tudelft.nl/uuid:61740465-b640-4a0f-8c97-8bef79c36764

ASME

2019-01-01

978-0-7918-6185-1

Proceedings of the the 10th International Symposium on Cavitation (CAV2018)

CAV2018: 10th International Symposium on Cavitation, 2018-05-14 → 2018-05-16, Baltimore, United States

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

conference paper

© 2018 Themistoklis Melissaris, Norbert Bulten, T.J.C. van Terwisga