Lücke, ThomasThomasLücke2024-04-122024-04-122024-04-048th International Symposium on Marine Propulsors (smp 2024)978-82-691120-5-4https://hdl.handle.net/11420/46446Within the national founded research project DeffProForm HSVA has designed two unconventional tip-rake propellers for the HSVA Hamburg Container Ship (HCS). This test case represents a 8000 TEU postpanmax container ship. The aim of the work was to investigate and to make full use of the potential provided by unconventional propeller designs aiming at reducing the fuel consumption by increasing the propeller efficiency. Therefore HSVA has enhanced the design procedure for such unconventional tip-rake propellers as well as the numerical tools (BEM-, RANS-code) for their performance prediction. During the design process the potential of positive and negative rake orientation has been investigated regarding efficiency and cavitation characteristics. Focus has been set on differences between conventional and the unconventional blade shapes as well as the capability of the analysis tools to predict them. For validation purpose of the new designs and the numerical tools, model tests have been performed in HSVA’s large towing tank, conventional cavitation tunnel and the HYKAT. This paper summarizes the design work, experience and investigations done at HSVA to achieve a better understanding and predictability of these kinds of unconventional propellers.enhttp://rightsstatements.org/vocab/InC/1.0/Unconventional propeller designtip-rakeefficiencylimiting stream linesRANSCFDEngineering and Applied OperationsConference Paper10.15480/882.931010.15480/882.931010.15480/882.9294Conference Paper