Experimental Study of Heat Transfer around a Cylinder in Presence of Electric Field

In this paper, effects of EHD actuators on hydrodynamic behavior and heat transfer of air flow over a circular cylinder were considered. Pressure and temperature distributions around the cylinder were measured in presence of wire-plate EHD actuators. The Reynolds number based on cylinder diameter (d) were ۳۵۰۰, ۷۰۰۰. Experiments were performed for various configurations. Based on obtained results, the flow field around the cylinder was affected significantly by EHD actuation. The flow visualization confirmed the formation of separation bubble because of EHD actuation and affected pressure distribution dramatically. Measured temperatures showed that the excess flow, resulted from corona wind, enhanced local and average heat transfer over the cylinder.