Effects of movement speeds and hull forms on wave drag reduction in a single-file ship formation

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Zhu, Fengshen and Yuan, Zhiming (2024) Effects of movement speeds and hull forms on wave drag reduction in a single-file ship formation. In: The 15th International Conference on Hydrodynamics (ICHD 2024), 2024-09-02 - 2024-09-06.

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Abstract

The phenomenon of ducklings following their mothers in a single file configuration has been revealed by the mechanism of wave-riding and wave-passing. The universality of this mechanism is further validated and expanded by a single-file ship formation in present study. A two-ships formation is utilized to investigate the effect of movement speeds and hull form on the wave drag reduction. Based on three objectives, the optimal distances between two ships are determined. It is found that when two ships are in close proximity, the leading vessel experiences a notable decrease in wave drag across most speeds, albeit at the expense of an increase in wave drag for the trailing ship. Once the Froude number surpasses 0.225, the optimal distances between the two ships and their corresponding CDR values show negligible disparities in minimizing the drag for both the trailing ship and the entire ship formation. Adjusting the main dimensions of the trailing ship can variably affect the total drag of the entire ship formation depending on the objective. Increasing these dimensions may elevate the total drag of the formation when prioritizing the minimization of the leading ship's drag. However, it decreases the total drag when focusing on minimizing the drag of either the trailing ship or the entire ship formation.

ORCID iDs

Zhu, Fengshen and Yuan, Zhiming ORCID logoORCID: https://orcid.org/0000-0001-9908-1813;
CORE (COnnecting REpositories)