HEAT-TRANSFER ENHANCEMENT IN A CONVECTIVE FIELD BY APPLYING IONIC WIND

This study has been conducted to pursue the enhancement of forced-conv ection heat transfer by applying an electric field. Experiments were p erformed in an air channel flow where a series of wire-electrodes were installed in parallel with the primary flow direction, or installed a t right angle to the primary flow direction. By applying the electric field, secondary flow was electro-hydrodynamically induced by the Coul omb force. The visualization of flow patters and measurement of heat t ransfer coefficient and consuming power were carried out. The theoreti cal analysis oil electric, flow and temperature field was also perform ed taking account of momentum transfer between ions and neutral fluid molecules. On the basis of these results, fundamental characteristics of the EHD combined flow and the heat transfer were clarified in conju nction with applied voltage, primary velocity and wire-electrode arran gement. And, the possibility of the practical applications of the ioni c wind are discussed.