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Setting new standards for model propeller testing

AuthorsKerkvliet, M., Schuiling, B.
Conference/JournalMARIN Report 138
Date20 dec. 2023
What if a small modification could dramatically enhance the accuracy, interpretability and reliability of model tests used to predict ship performance? This is not mere fiction, but the result of three years of intensive research into model propeller boundary layers.

In this research, we reinvented an Experimental Fluid Dynamics (EFD) method to visualise propeller boundary layer flow using paint, refined Computational Fluid Dynamics (CFD) simulations, and developed an innovative approach to stimulate turbulence in propeller models.

These advancements are not just academic; they promise practical improvements in maritime model testing. This article will explore the intricacies of this groundbreaking method and its far-reaching implications for the maritime industry.In our quest to improve the accuracy and reduce the uncertainty of model tests, we have confronted a key challenge: the nature of the propeller's boundary layer during model tests.

Contact

Contact person photo

Maarten Kerkvliet

Senior Researcher

Bart Schuiling

Senior Researcher

PRACTICAL IMPROVEMENTS

Since the 1940s, MARIN has recognised that model propeller boundary layers are often laminar or partially laminar during model tests. This is a problem because it does not represent the full-scale turbulent flow, which is what the model tests are intended to simulate in order to predict the performance of the propeller.
Boundary layer visualisation at design condition using EFD and CFD

Boundary layer visualisation at design condition using EFD and CFD

Abridged video of open-water propeller paint test (Courtesy ABB).
Tags
cfd developmentcfdcfd/simulation/desk studiesmodel testingpropeller design