Title page for etd-0731114-235106


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URN etd-0731114-235106
Author Yu-En Cheng
Author's Email Address No Public.
Statistics This thesis had been viewed 5349 times. Download 483 times.
Department Mechanical and Electro-Mechanical Engineering
Year 2013
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Lagrangian-Based Investigation for Dynamic Stall
Date of Defense 2014-07-14
Page Count 72
Keyword
  • Dynamic stall
  • Numerical simulation
  • Lagrangian Coherent Structures
  • Turbulence model
  • Pitching airfoil
  • Abstract The phenomenon of dynamic stall for a single pitching foil is simulated and analyzed in this study. The differences between static and dynamic stall are investigated in terms of lift coefficient. In addition to the traditional Eulerian viewpoint, Lagranigan coherent structures are also utilized to gain more insights of the flow physics.
    The result of simulation can capture the dynamic flows effectively on qualitative. It is shown that the strength and location of vorticity will affect the lift, and so does the interactions between high and low pressure area, which are dominated by angle of attack. The leading-edge vortex usually will enhance the lift. As for the trailing-edge vortex, it will reduce the lift. On the other hand, the lift will increase if this vortex is closer to the upper surface.
    Advisory Committee
  • Kuang-Chuan Lin - chair
  • Yi-Ju Chou - co-chair
  • Chieh-Sen Huang - co-chair
  • Mei-Jiau Huang - co-chair
  • Chien-Chou Tseng - advisor
  • Files
  • etd-0731114-235106.pdf
  • indicate access worldwide
    Date of Submission 2014-09-03

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