Effects of upstream tetrahedron length on flow characteristics around juncture of circular cylinder and flat plate
| Autor: | Rong Fung Huang, Tsung-Hsin Cheng, Ching Min Hsu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Fluid Flow and Transfer Processes
Flow visualization Physics Mechanical Engineering General Chemical Engineering 0208 environmental biotechnology Aerospace Engineering Reynolds number Geometry 02 engineering and technology 01 natural sciences 010305 fluids & plasmas 020801 environmental engineering Vortex Physics::Fluid Dynamics symbols.namesake Nuclear Energy and Engineering Particle image velocimetry Flow (mathematics) 0103 physical sciences symbols Tetrahedron Cylinder Juncture |
| Zdroj: | Experimental Thermal and Fluid Science. 92:295-305 |
| ISSN: | 0894-1777 |
| Popis: | The influences of the length of tetrahedron juncture flow controller (JFC) and Reynolds number on the flow in the vertical symmetrical plane of the upstream region and near wake of a circular cylinder-flat plate juncture were studied experimentally in a towing water tank. The flow was analyzed by the particle-tracking flow visualization method and particle image velocimetry. The Reynolds number ranged from 500 to 6000. The inverse of nondimensional boundary-layer displacement thickness was from 3.27 to 10.33. The tetrahedron length-to-circular cylinder diameter ratio ranged from 0 to 1.4. The natural flow presented single-vortex, dual-vortex, triple-vortex, and unsteady vortical flow modes in different ranges of Reynolds numbers. The effects of the tetrahedron JFC installed at the leading edge of the juncture on the flow patterns significantly depended on the tetrahedron length and a little on the Reynolds number. Larger tetrahedron length was required to change flow modes and eliminate horseshoe vortices at larger Reynolds number. Within the range of Reynolds numbers |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect