Experimental Investigation for Wake of the Circular Cylinder by Attaching Different Number of Tripping Wires

An experimental study is conducted on flow past a circular cylinder fitted with some tripping wires on its surface. The work investigates the dependency of the critical wire locations on the wire size and Reynolds numbers, and examines the wake and vortex shedding characteristics in an effort to advance the understanding of the critical wire effects beyond the existing literature. The primary aim of this investigation is to assess the significance of the angular locations of the surface trip wire. For the novelty, 2, 4, 6, 8 and 10 number of trip wires on the circular cylinder surface and for two Reynolds numbers are employed. Furthermore, the two and one tripping wire with 45 and 60 degrees angular positions on the circular cylinder surface that has be found very unstable by the other researchers but, in this study at these two angular positions the unstable relationship is lower by attaching different number of tripping wires on the circular cylinder surface. The cylinders used as test models each had a diameter of 20mm and length of 400mm.