Title page for etd-0209110-140012


[Back to Results | New Search]

URN etd-0209110-140012
Author Yi-Hsin Wu
Author's Email Address m963020045@student.nsysu.edu.tw
Statistics This thesis had been viewed 5577 times. Download 1369 times.
Department Mechanical and Electro-Mechanical Engineering
Year 2009
Semester 1
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Flow induce vibration of a circular cylinder with different mass ratio in shear flow
Date of Defense 2010-01-28
Page Count 68
Keyword
  • two-degree-of-freedom cylinder
  • vortex-induce vibration
  • shear flow
  • Abstract This thesis is an experimental study of shear effect of a two-degree-of-freedom cylinder in fluid flow in terms of different mass ratio. This study is done using an elastic cylinder of high natural frequency, and the free stream velocity is 0.2m/s to 1.5m/s. The results show that as mass ratio increases, the motion of cylinder becomes more stable and small, and the frequency response of cylinder self-excited is bigger than vortex-shedding response when spring constant is bigger enough. Thus it is not easy to observe the vortex-shedding frequency variation with respect to various velocities by dint of cylinder vibration. When it come to the shear effect, the effect of shear flow could decreases the drag force, and increases the lift force. Orbits of cylinder vibration is not symmetric; the displacement is more significant on low velocity side.
    Advisory Committee
  • none - chair
  • none - co-chair
  • none - advisor
  • Files
  • etd-0209110-140012.pdf
  • indicate in-campus access immediately and off_campus access in a year
    Date of Submission 2010-02-09

    [Back to Results | New Search]


    Browse | Search All Available ETDs

    If you have more questions or technical problems, please contact eThesys