Leakage-Flow-Induced Vibrations of an Axisymmetric Body : Analysis of the Fluid Dynamic Forces Exerted on an Axisymmetric Body

    • ARAI Masaaki
    • Faculty of Technology, Tokyo University of Agriculture and Technology

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Abstract

An analytical investigation is presented on leakage-flow-induced vibrations of an axisymmetric body. In the case of a narrow annular passage between a tapered outer cylinder and a tapered axisymmetric body, the fluid-dynamic forces acting on the body have been divided into the fluid-dynamic mass, damping and stiffness. The following conclusions were obtained through research on those coefficients. The dynamic instability of the systems is due to fhe phade lag of the fluid-dynamic force for displacement of the body caused by harmonic vibration. The fluid-dynamic damping is obtained in two parts: one is independent of the frequency and the other is a function of the frequency, and the negative damping is caused by the fluid-dynamic damping which is a function of the frequency. When the frequency is very large, the fluid-dynamic mass agrees with added mass within the fluid at rest.

Journal

JSME international journal. Ser. 3, Vibration, control engineering, engineering for industry   [List of Volumes]

JSME international journal. Ser. 3, Vibration, control engineering, engineering for industry 35-III(1), 56-64, 1992-03-15  [Table of Contents]

The Japan Society of Mechanical Engineers

Cited by:  2

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Codes

  • NII Article ID (NAID) :
    110002503264
  • NII NACSIS-CAT ID (NCID) :
    AA10680610
  • Text Lang :
    ENG
  • Article Type :
    Journal Article
  • ISSN :
    09148825
  • Databases :
    CJPref  NII-ELS