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The purpose of this work was to control undesired structure and vibrations caused from vortex shedding by controlling the flow downstream of the cylinder. The porosities of the outer cylinder and the splitter plate used for this purpose are available. The other parameter was plate angle based on the flow direction as a reference. The parameter expressed as porosities, &amp;amp;szlig; was chosen to have a %70 openness for the outer cylinder (&amp;amp;szlig; = 0.7) and was kept constant throughout all experiments. On the other hand, two different porosities were used for the splitter plate. For the first plate, there was no hole on the plate which we call &amp;amp;szlig; = 0 or solid plate. For the second plate, it has &amp;amp;szlig; = 0.7 porosity. &amp;amp;szlig; = 0.7 porosity was also the value chosen for the outer cylinder. The range of the splitter plate angle was selected within 60o? ? ?180o with an increment of 30o. The results were extracted using two different methods. The first was the dye visualization experiment and the second is the PIV (Particle Image Velocimetry) measurement. As a result, it was observed that independently from the outer cylinder effect, the plate porosity and plate angle are effective on the level of turbulence and the flow structure in the annular region.

Controlling The Flow Structure of Circular Cylinder by Using Concentrically Installed Perforated Cylinder and Splitter Plate