Title page for etd-0802111-105624


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URN etd-0802111-105624
Author Yu-Hsuan Lin
Author's Email Address No Public.
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Department Mechanical and Electro-Mechanical Engineering
Year 2010
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Numerical simulation for flow induced vibration of three circular cylinders with various arrangement
Date of Defense 2011-07-04
Page Count 164
Keyword
  • shear flow
  • fluid elastic vibration
  • three circular cylinders
  • Abstract The present study aims to explore dynamical behavior of the fluid- elastic vibration of a single cylinder and three cylinders in shear flow by numerical simulations. This paper investigates the effects of the shear parameter, mass ratio, and spacing(P/D) on fluid-elastic vibration of the cylinders.
    Continuity equation and momentum equations are solved alternatively using a CFD package, Fluent 6.3.26. Dynamic meshing techniques together with the cylinder motion equations are employed in the simulation. Under different flow conditions, flow types, and cylinder motion models, lock-in and fluid-elastic vibration are studied.
    The results show that motion and flow types of a single cylinder in uniform flow are in agreement with the previous studies in literatures. In shear flow, however, as the shear parameter increases, the fluid-elastic vibration of the cylinder is induced, and thus amplitude of the cylinder increases considerably. Further, three cylinders in the shear flow are studied. Three cylinders arrangements (classified as side-by-side, tandem ,and stagger) and the distance between cylinders are the factors to cause fluid-elastic vibration. Compared with the single cylinder motion, three cylinders motion’s critical flow velocity is smaller than that of the single cylinder motion, which means two cylinders motion are more subject to fluid-elastic vibration.
    Advisory Committee
  • Chien-Yuh Yang - chair
  • Chien-Chou Tseng - co-chair
  • Ru Yang - advisor
  • Ming-Huei Yu - advisor
  • Files
  • etd-0802111-105624.pdf
  • Indicate in-campus at 5 year and off-campus access at 5 year.
    Date of Submission 2011-08-02

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