This thesis evaluates the entanglement of an unmanned underwater vehicle (UUV) propelled by an open, three-bladed propeller when operating in marine vegetation native to littoral environments. A tow tank populated with synthetic giant kelp and eelgrass was used to simulate an underwater environment. An early variant of a REMUS 100 UUV designed to conduct underwater surveillance was used for entanglement tests. Three different entanglement tests were conducted. A vegetation density and constant entanglement test, conducted bychanging vehicle steady-state speed and marine vegetation density, showed an increased entanglement risk for eelgrass and astern propulsion operations, and increased vegetation density. A lateral placement entanglement test, conducted by changing the marine vegetation location relative to the vehicle center line, showed an increase in entanglement risk for vegetation located close to the propeller and indicated a relationship between propeller diameter, vegetation location, and entanglement. A preliminary accelerating speed entanglement test, conducted by changing the vehicle speed at the propeller entry to a vegetation field, showed that as the ratio of vehicle speed at propeller entrance to steady-state speed decreased, the likelihood of an entanglement increased. Recommended future work includes entanglement testing for different UUV types, testing in the operating environment, and assessing devices or procedures intended to reduce entanglement risk.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Experimental Assessment of Entanglement for an Unmanned Underwater Vehicle with an Open, Three-Bladed Propeller


    Beteiligte:
    K. E. Irgens (Autor:in)

    Erscheinungsdatum :

    2020


    Format / Umfang :

    269 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Three-bladed propeller conversion

    Emerald Group Publishing | 1999


    Propeller of unmanned underwater vehicle

    ZHANG MING / WANG QINGHUA | Europäisches Patentamt | 2021

    Freier Zugriff

    Water flow energy underwater unmanned vehicle propeller

    ZHENG LIANXING / SU PEILI / LI BIN et al. | Europäisches Patentamt | 2023

    Freier Zugriff

    ENERGY-EFFICIENT BLADED PROPELLER

    SAPARGALIYEV ALDAN ASANOVICH | Europäisches Patentamt | 2020

    Freier Zugriff

    Propeller blade, unmanned aerial vehicle propeller and unmanned aerial vehicle

    CHEN FENG / TAKAMICHI / WANG HANKUI | Europäisches Patentamt | 2024

    Freier Zugriff