Author/Authors :
Reza-zadeh, S. hakim sabzevari university - Department of mechanical engineering, سبزوار, ايران , Masumi, H. university of tabriz - Department of Mechanical Engineering, تبريز, ايران , Esmaeilzadeh, E. university of tabriz - Department of Mechanical Engineering, تبريز, ايران
Abstract :
In this research work, a compound flow control method (passive and active) has been described. EHD actuators as wire-plate (active) and a splitter plate (passive) were applied simultaneously to control the fluid flow and heat transfer around a circular cylinder. The investigation consists of the interaction between electric fi.eld. fluid flow and temperature fi.eld. Experimental tests included various positions of the splitter plate and two Reynolds numbers. Re=3500. 7000. EHD actuators were wire-plate (Acctrodcs. The cylinder and the splitter plate were connected to the ground and used as cathode (Acctrodcs. Pressure and temperature distributions over the surface of the cylinder were measured. The results show that two effective corona winds appear in the flow around the cylinder. The first corona wind is between wires and the cylinder and the second one is between wires and the splitter plate. The two corona winds affected the fluid flow and heat transfer. The presence of the splitter plate caused a decrease in drag force and an increase in heat transfer. By increasing gap distance, the (effect of the second corona was reduced.
