Accession Number : AD0759006

Title :   Vertical Water Entry of Finite Cones - a Numerical Calculation,

Corporate Author : NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s) : Shere,Kenneth D. ; Vander Vorst,Michael J.

Report Date : 06 FEB 1973

Pagination or Media Count : 44

Abstract : In the report a numerical solution of the impact phase during vertical water-entry of a finite cone is presented. The hydrodynamic code, MACWET, which calculates the solutions, utilizes an extension of the marker and cell method. The following examples are included: (1) a constant velocity cylinder impacting at 131 ft/sec.; (2) a three inch (radius), 90 degrees steel cone falling from rest with its vertex barely submerged in the water; (3) a three inch, 90 degrees steel cone impacting at 131 ft/sec.; and (4) a 136 lb., nine inch, 90 degrees cone impacting at 40 ft/sec. (The code is not limited to 90 degrees cones). The numerical results are compared with available experimental data. (Author)

Descriptors :   (*NOSE CONES, *WATER ENTRY), DESCENT TRAJECTORIES, CONICAL BODIES, IMPACT, INCOMPRESSIBLE FLOW, MATHEMATICAL MODELS

Subject Categories : Guided Missile Traj, Accuracy and Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE