Accession Number:

AD0759006

Title:

Vertical Water Entry of Finite Cones - a Numerical Calculation,

Descriptive Note:

Corporate Author:

NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s):

• Shere,Kenneth D.
• Vander Vorst,Michael J.

Report Date:

1973-02-06

Pagination or Media Count:

44.0

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 ftsec. 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 ftsec. and 4 a 136 lb., nine inch, 90 degrees cone impacting at 40 ftsec. 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 Trajectories, Accuracy and Ballistics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE