In this paper, a simple practical method to estimate the drag of Super-Cavitating Underwater Vehicles (SCUV) is proposed that can obtain the drag with only principal dimensions in an initial design stage. SCUV is divided into cavitator, forebody, afterbody, base, and control fin and the drag of each part is estimated. The formulas for the drag coefficient are proposed for the disk and cone type cavitators and wedges used as control fins. The formulas are a function of cavitation number, cone or wedge angle, and Reynolds number. This method can confirm the drag characteristics of SCUV that the drag hump appears according to the coverage of the body by the cavity and the cavitator drag remains only when the entire body is covered by cavity. Applying this method to SCUV of various shapes, it is confirmed that the effects of cavitating and non-cavitating conditions, cavitator and body shape, and speed could be found.


    Access

    Download


    Export, share and cite



    Title :

    A study on practical method to estimate drag of super-cavitating underwater vehicles


    Contributors:


    Publication date :

    2021




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown





    Hydrodynamic characteristics of two low-drag super-cavitating hydrofoils

    McGehee, J.R. / Johnson, Jr., V.E. | Engineering Index Backfile | 1959


    Cavitator Drive System of Super Cavitating Underwater Vehicle

    YOO YOUNG JOON / KI TAE SEOK / CHO SEUNG HWAN et al. | European Patent Office | 2018

    Free access

    Cavitator Drive System of Super Cavitating Underwater Vehicle

    European Patent Office | 2018

    Free access

    A numerical and experimental study on the drag of a cavitating underwater vehicle in cavitation tunnel

    Jung-Kyu Choi / Byoung-Kwon Ahn / Hyoung-Tae Kim | DOAJ | 2015

    Free access