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Using the Wave Propulsors in a Small-Waterplane-Area-Twin-Hull Boat

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Abstract

The efficiency of two types of wave propulsors (WPs) (a swinging spring-loaded wing WP and a direct-flow WP) is experimentally studied on a model of a small-waterplane-area-twin-hull (SWATH) boat. The NACA0015 airfoil was used as an operating element of both the swinging and the direct-flow WPs. In the case of a direct-flow WP, the flat airfoil was rigidly fixed relative to the boat hull with a chord inclination of 30°. The operating efficiency of the wave propulsors is studied for waves of various lengths depending on the draft of the SWATH boat hulls, and in the case of a swinging spring-loaded wing WP, also on the submergence depth of the propulsor. Using the results of towing tests, the thrust force of a direct-flow WP is estimated under various operating conditions. It is found that with increase in the submergence depth of the boat hulls, the efficiency of the direct-flow WP increases, while the efficiency of the swinging WP decreases, however, it largely retains its operability, provided that the WP operating element remains at the optimal depth close to the water surface.

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ACKNOWLEDGEMENTS

The authors express thanks to the leading engineers of Laboratory no. 105 of the Institute of Mechanics of Moscow State University, A.Yu. Yakimov and A.A. Puchkov, who carried out towing tests of the boat models.

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Authors and Affiliations

  1. Moscow State University, Institute of Mechanics, Moscow, Russia

    V. V. Prokofiev, E. A. Arkhangelsky, A. V. Boyko & E. V. Filatov

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  1. V. V. Prokofiev
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  2. E. A. Arkhangelsky
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  3. A. V. Boyko
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  4. E. V. Filatov
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Correspondence to V. V. Prokofiev or A. V. Boyko.

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Translated by I.G. Brykina

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Prokofiev, V.V., Arkhangelsky, E.A., Boyko, A.V. et al. Using the Wave Propulsors in a Small-Waterplane-Area-Twin-Hull Boat. Fluid Dyn 58, 19–30 (2023). https://doi.org/10.1134/S0015462822601929

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  • DOI: https://doi.org/10.1134/S0015462822601929

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