Experiment of Falling Cylinder Through the Water Column

Abstract

Hydrodynamic features of a falling cylinder into the water column are investigated experimentally. The experiment consisted of dropping three cylinders of various lengths into a pool where the trajectories were filmed from two angles. The controlled parameters are cylinder's physical parameters (length to diameter ratio, center of mass location), and initial drop conditions (initial velocity and drop angle). Six trajectory patterns (straight, spiral, flip, flat, seesaw, combination) are detected during the experiment. The center of mass position has the largest influence on the trajectory of cylinders. The observed motion of cylinders is well simulated using a numerical model based on the momentum and moment of momentum balances using triple coordinate transform.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2005
Accession Number
ADA529895

Entities

People

  • Anthony Gilles
  • Chenwu Fan
  • Peter Cheng Chu

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Aspect Ratio
  • Buoyancy
  • Cameras
  • Coordinate Systems
  • Data Analysis
  • Detectors
  • Diameters
  • Fluid Mechanics
  • Geometry
  • Momentum
  • Naval Operations
  • Reynolds Number
  • Ships
  • Statistical Analysis
  • Three Dimensional
  • Trajectories
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Control Systems Engineering.
  • Explosive Engineering.
  • Structural Dynamics.