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Determination of aerodynamic and hydrodynamic drag of selected pneumatic life rafts

Jachowski Jacek, Książkiewicz Edyta

Zeszyty Naukowe Politechniki Morskiej w Szczecinie

2025

nr 84 (156)

172--178

The success of a search and rescue operation at sea depends on accurately determining the location and search area of a drifting pneumatic life raft, with particular emphasis on drift. This article examines the leeway of pneumatic life rafts and provides a summary of the available types used as life-saving appliances on ships. Based on experimental and numerical studies, the technical characteristics of the life rafts were compared, and the relationship between their shape and leeway components was analyzed. The research demonstrated the degree of dependence between the life raft’s shape and its aerodynamic and hydrodynamic drag. The results obtained are significant and will inform further numerical studies on leeway and search area estimation. The authors’ previous experimental and numerical work, as well as findings from earlier publications, form the basis for the calculations presented in this paper.