Comparative analysis of the hydrodynamic performance of untwisted and twisted rudders using a hybrid RANSE/BEM model
Paper in proceedings, 2014

Results of a computational study on the hydrodynamic perfor- mance of twisted and untwisted rudders for a single screw vessel are presented. Ship flow simulations are performed by using a hybrid RANSE/BEM model. Numerical predictions by RANSE and BEM solvers are validated through comparisons against ex- perimental data for the ship considered in the study. The com- parative analysis of untwisted and twisted rudders is carried out by fully–appended ship flow simulations at uniform ship speed and rudder angles between 0 and 20 degrees. Numerical results predict comparable manoeuvring capabilities for the alternative layouts, whereas the twisted design allows to mitigate negative pressure peaks observed on the untwisted rudder surface over a range of helm angles.

propeller–rudder interaction

Hybrid RANSE/BEM model

twisted rudder

Ship hydrodynamics


Danilo Calcagni

Flavia Bellotto

Riccardo Broglia

Francesco Salvatore

Rickard Bensow

Chalmers, Shipping and Marine Technology, Division of Marine Design

ISOPE-2014: The 24th International Ocean and Polar Engineering Conference

1098-6189 (ISSN)


Driving Forces

Sustainable development

Innovation and entrepreneurship

Areas of Advance




C3SE (Chalmers Centre for Computational Science and Engineering)

Subject Categories

Vehicle Engineering

Fluid Mechanics and Acoustics



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