In this study, the feasibility of the ALE algorithm in analyzing the drag of a rigid truncated hemispherical-nose projectile at the initial stage of vertical water entry is examined. The water entry process is simulated under the conditions of different dilated half-angles of the head plane (DHAHPs) and muzzle velocities (u 0). The drag coefficient is obtained by dimensionless processing of the drag. The maximum (Cdmax) drag coefficients of the initial stage are fitted to obtain the generalised impact laws of water entry. The results show that the larger the DHAHP, the smaller is u 0 and the higher is Cd max. The bivariate fitting formula for Cd max of the truncated hemispherical-nose projectile has high prediction accuracy and wide applicability. The average (Cd ave) drag coefficients of the projectile changes significantly after DHAHP of approximately 40°. This change is related to the wet state of the head.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Numerical investigation on drag characteristics of the truncated hemispherical-nose projectile in vertical water entry


    Contributors:
    Yuan, Kuo (author) / Yu, Junwei (author) / Gu, Xuan (author) / He, Zheng (author) / Yu, Hang (author)

    Published in:

    Ships and Offshore Structures ; 18 , 12 ; 1726-1736


    Publication date :

    2023-12-02


    Size :

    11 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown




    Missile DATCOM Transonic Drag Improvements for Hemispherical Nose Shapes

    Neely, Amanda / Auman, Lamar / Blake, William | AIAA | 2003



    Residual velocity for the truncated ogival-nose projectile into stiffened plates

    Zhan, Tingbian / Li, Jinzhu / Lv, Shufang et al. | Taylor & Francis Verlag | 2016



    AIAA-2003-3668 Missile DATCOM Transonic Drag Improvements for Hemispherical Nose Shapes

    Auman, L. / Blake, W. / Neely, A. et al. | British Library Conference Proceedings | 2003