The Tripping JIP is aiming at reliable full-scale predictions for both open water performance and propulsive performance. The objective of this JIP is to develop new propeller scale-corrections to be able to predict more accurately full scale open water performance and propulsive performance.SCOPE
The scope of the Tripping JIP project is defined in four work packages:
- Propeller open water model tests with turbulators – the F-series, FC-series, C-series and B-series will be revisited amongst other (public) propellers. About 100 model tests at 4 different Reynolds numbers are planned and 23 new propeller models will be manufactured.
- Open water RANS computations – study the performance at a large range of Reynolds number, up to full scale, with varying surface roughness. About 130 propellers will be extensively computed. A RANS workshop will be organized to set the CFD approach.
- Develop a generic scale correction method based on the model tests and RANS computations – to be used with tripped propellers to replace the currently used scale corrections. This will be at least a function of blade number, pitch, blade area ratio, J-value, Reynolds number (both at model scale and full scale) and full scale surface roughness. Correlation allowances for RANS computations will also be created based on this dataset.
- Develop a full scale B-series polynomial – combine the open water model tests, the RANS-computations and the generic scale correction method to make a new polynomial. A software package will be provided.
BUDGET AND PLANNING
- For propeller designers and manufacturers: less surprises during model tests or full scale trials and better control of the propeller design on both model scale and full scale.
- For yards, ship owners and operators: more reliable full scale predictions and improved propeller designs.
- For R&D: benchmark data for RANS computations on propellers for reference and quality checks.
- For other research institutes, class societies and participants with their own model test facilities improvement of the extrapolation methodology and more reliable predictions.
The Tripping JIP proposal
includes the project plan (Annex A), budget and planning. The proposal will be discussed during the upcoming VOF meeting in Busan, South Korea, 30 November 2023. You are kindly invited to register at www.vesseloperatorforum.com
Registration is recommended before 1 March, 2024. The first work group meeting will be organized during The Blue Forum
, April 2024 in Venezia, Italy.
The project will take three years to complete.
For more information read the leaflet below
or follow the Tripping JIP on LinkedIn