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Experimental and numerical investigation of towing resistance of the innovative pneumatic life raft

100%

Burciu Z. , Abramowicz-Gerigk T. , Jachowski J. , Kornacka E. , Wawrzusiszyn M.

2017

tom nr 2

40--47

The paper presents the experimental and numerical investigations of a novel design of a pneumatic life raft in calm water conditions. Two main issues were considered: the life raft performance under tow and its resistance in calm water conditions. The experiment and CFD simulations were performed by using the full scale prototype to eliminate the scale effect. The towing tank tests confirmed the results of numerical computations. The compatibility of the results of numerical and experimental tests was high mainly because the new life raft does not deform under the hydrodynamic and aerodynamic loads. The characteristics similar to rigid body behaviour result mainly from a new construction and materials used for manufacturing the life raft.

Numerical prrediction of pneumatic Life raft performance

63%

Jachowski J. , Książkiewicz E.

2024

tom Vol. 18 No. 1

229--232

The success of the Search and Rescue (SAR) operation depends on the correct assignation of the search area for the drifting pneumatic life raft, with particular emphasis on leeway. The leeway is directly dependent on the hydrodynamic drag and wind pressure force acting on above-water and underwater parts of the life raft. The paper presents the numerical study on the pneumatic life raft performance including hydrodynamic and aerodynamic characteristics in a wide range of operational conditions. The numerical simulation results were compared with model test results obtained in towing tank and wind tunnel. The proper prediction of life raft performance is important for determination of life raft safety function dependent on wind velocity and operational characteristics. The results of numerical simulation are in line with data available in literature and obtained from empirical investigations.

Badania eksperymentalne oporu pneumatycznej tratwy ratunkowej

51%

Kornacka E.

tom Z. 30

128--138

W artykule przedstawiono metody prognozowania właściwości hydrodynamicznych obiektów pływających. Podkreślono znaczenie badań modelowych wykonywanych w skali rzeczywistej, przywołując konkretne przykłady. Opisane badanie oporu pneumatycznej tratwy ratunkowej, wykonane w warunkach wody spokojnej, na basenie holowniczym Ośrodka Hydromechaniki Okrętu CTO, zaprezentowane zostało w kontekście badań prototypu nowego środka ratunkowego, przeprowadzonych przez Katedrę Eksploatacji Statku Akademii Morskiej w Gdyni.

This publication presents methods forecasting the hydrodynamic properties of floating objects. It emphasized the importance of model tests performed in the real scale citing specific examples. The described resistance test of the pneumatic life raft, performed in calm water conditions, in the towing tank of Ship Hydromechanics Division of Ship Design and Research Center, is presented in the context of a prototype of a new means of rescue, conducted by the Department of Ship Operation, Navigational Faculty, Gdynia Maritime University.