Water Tunnel Simulation Study of the Later Stages of Water Entry of Conical Head Bodies

Abstract

The feasibility of utilizing a water tunnel for studying the cavity- running phase of water entry was explored in this test program. Using conical head models, steady state ventilated cavity tests were conducted in the 12-inch water tunnel to determine cavitation number versus cavity length, pressure distribution, ventilation air flow coefficient and cavity area coefficient. Following these steady-state tests, a cavity attrition test was performed to simulate the decay of the cavity in the last stage of water entry prior to fully wetted flow. The results are interpreted as an indication that quasi-steady analysis may be useful for studying water entry phenomenon at least for decelerations of the order of 3 ft/sec/sec.

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Document Details

Document Type
Technical Report
Publication Date
Jun 18, 1975
Accession Number
ADA015129

Entities

People

  • J. W. Holl
  • Jeong‐Han Kim

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Flow
  • Cameras
  • Deceleration
  • Diameters
  • Entrainment
  • Equations
  • Experimental Data
  • Flow Rate
  • Froude Number
  • Geometry
  • Measurement
  • Photographs
  • Pressure Distribution
  • Simulations
  • Steady State
  • Universities
  • Water Tunnels

Readers

  • Computational Modeling and Simulation
  • Fluid Dynamics.
  • Marine Propulsion Engineering and Naval Architecture