The use of air cavities beneath ship hulls can lead to significant drag reduction. A study of air-ventilated cavities under a simplified hull has been undertaken. Experiments with a 56-cm-long stepped-hull model were carried in an open-surface water channel at flow velocities 28-86 cm/s. The air-cavity parameters were measured at different model positions. Different cavity forms, a strong growth of the cavity length with the flow velocity, and an optimal trim angle for the largest air-cavity area were identified. Numerical studies were conducted using a linear potential-flow method and the finite-volume viscous code Fluent. The computationally inexpensive three-dimensional potential-flow modeling predicted air-cavity shapes and provided qualitative agreement with the measured average length of the air cavity. Two-dimensional viscous modeling reasonably predicted macroscopic features and viscous effects in the air-cavity flow, while exaggerated the mixed-phase flow regions.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Study of air-ventilated cavity under model hull on water surface


    Weitere Titelangaben:

    Untersuchung eines belüfteten Hohlraums unter dem Schiffskörper eines Modells auf einer Wasseroberfläche


    Beteiligte:

    Erschienen in:

    Ocean Engineering ; 36 , 12-13 ; 930-940


    Erscheinungsdatum :

    2009


    Format / Umfang :

    11 Seiten, 30 Quellen




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch




    Marine surface vessel comprising an air ventilated hull

    FRODĖ MIKAEL | Europäisches Patentamt | 2024

    Freier Zugriff

    A MARINE SURFACE VESSEL COMPRISING AN AIR VENTILATED HULL

    FRODÉ MIKAEL | Europäisches Patentamt | 2024

    Freier Zugriff

    A MARINE SURFACE VESSEL COMPRISING AN AIR VENTILATED HULL

    FRODÈ MIKAEL | Europäisches Patentamt | 2021

    Freier Zugriff

    A MARINE SURFACE VESSEL COMPRISING AN AIR VENTILATED HULL

    FRODÉ MIKAEL | Europäisches Patentamt | 2020

    Freier Zugriff

    Air cavity with variable length under a model hull

    Matveev, K I | Online Contents | 2011