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(Experimental Investigation Influence of Submerged Vanes on Dimension Separation Zone and Control Turbulent at a 90˚ Open-Channel Junction)

Nikbin, Sahar | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42005 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Borghei, Mahmoud
  7. Abstract:
  8. In this study, the effect of submerged vanes on the flow pattern and dimensions of separation zone at a 90˚ open-channel Junction were investigated. The experiments were conducted in three stages. First, for validity of data with the results of webber et al, using ADV, velocities was teken without submerged vanes.in the second stage, experiments with dye injection was performed at confluence for several initial arrangement of vanes. From 54 different arrangements, two arrangements were selected. In three stage, three dimensional velocities was teken in two arrangement selected. Due to the significant reduction the size of separation zone in one of these arrangements, with moving this arrangement at the confluence, four arrangements were also discussed.
    For cheking the performance of the vane arrangements and positions, Acoustic Doppler Velocimeter (ADV) was used to measure the velocity at 144 position as a mesh. Using Tecplot software, flow pattern was extracted at two depths. After analyzing the data, effect of vanes at the different arrangement was obtained and proper arrangement of vanes were selected. Result show a significant reduction in dimensions of separation zone and turbulent kinetic energy in all arrangement. Finally, proper layout of the number of tests was selected and recommendations are presented
  9. Keywords:
  10. Channel Junction ; Acoustic Doppler Velocimeter (ADV) ; Separation Zone of Flow ; Submerged Vanes

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