DYNAMICS OF LIQUID-FILLED SHELL: RESONANCE AND EFFECT OF VISCOSITY

Abstract

Experiments have been conducted with liquid filled shell in free flight and with a liquid filled gyroscope. The cavities in each were designed to have a principal fluid frequency which was equal to the nutational frequency of the respective systems. Comparisons of experimental results with predictions of the inviscid theory of Stewartson showed significant Reynolds number effects. Both the rate of divergence of the nutational amplitude at resonance and the width of the resonance band are Reynolds number dependent. Also, there is a small shift or resonance frequency with Reynolds number. The experiments suggests, however, that in the limit, for large Reynolds numbers of the order of 10 to the 6th power, the inviscid theory gives excellent predictions.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1965
Accession Number
AD0468054

Entities

People

  • Boris G. Karpov

Organizations

  • Ballistic Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Agreements
  • Amplitude
  • Angular Momentum
  • Boundary Layer
  • Equations
  • Fineness Ratio
  • Flight
  • Free Flight
  • Frequency
  • Government Procurement
  • Gyroscopes
  • Moment Of Inertia
  • National Security
  • Resonance
  • Resonant Frequency
  • Reynolds Number

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Fluid Dynamics.