Unsteady Fluid Motion in Liquid Filled Projectiles

Abstract

For spinning and coning cylinders with liquid payloads, we established the Unified Approach based on our spatial eigenfunction expansion method as a powerful tool for studies of two types of instability: instability caused by large viscous stresses at low Reynolds' numbers and instability owing to resonance with inertial waves at medium and high Reynolds numbers. The applications of the Unified Approach to completely filled cylinders, partially-filled cylinders, cylinders with a central rod, and cylinders with two immiscible fluids successfully demonstrated interesting physical mechanisms such as resonances and produced useful results for future experiments and designs. We also performed inviscid analyses and computations by spectral collocation method as complementary studies for the Unified Approach. We developed unsteady three-dimensional Navier Stokes codes and employed them to simulate spin down experiments. We made progress in the moment calculation for silicone fluids, and investigated multiple states and the stability of flows in loosely coiled pipes.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1998
Accession Number
ADA343142

Entities

People

  • T. Herbert

Organizations

  • Ohio State University

Tags

Communities of Interest

  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aspect Ratio
  • Computational Science
  • Computations
  • Differential Equations
  • Engineering
  • Equations
  • Flow Visualization
  • Fluid Flow
  • Liquid Filled Projectiles
  • Mechanical Engineering
  • Navier Stokes Equations
  • Partial Differential Equations
  • Projectiles
  • Resonance
  • Steady State
  • Three Dimensional
  • Viscous Flow

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Control Systems Engineering.
  • Fluid Dynamics.