Ionic wind cooling for electronic elements is a relevant research field. In order to study the cooling performance of ionic wind on a Light Emitting Diode (LED), an ionic wind generator with a needles-ring electrode configuration was set up. A cylindrical heat sink for the heat dissipation of a heating film representing the LED chip was also manufactured. Following this, the effect of the needle number, the distance between the needles and the ring electrode, and the polarity of the corona discharge on the ionic wind velocity were studied. Finally, the optimal distance between the needles and the ring electrode was adopted to attain the maximum wind velocity with different numbers of needles. After this, the ionic wind device was used to cool the heating film at the working power of 10 watts. The surface temperature of the heating film was measured to evaluate the cooling performance of the ionic wind device. The experimental results indicate that the maximum temperature drop in the heating film center reaches 35.6 • C in the five needle-electrode case, which is very effective and can meet the demands of a 10 watts LED heat dissipation.
Ionic wind, an induced phenomenon during corona discharge, possessing the features of silent operation and no moving parts, has a wide range of applications. Ionic wind generation is accompanied by complex physical processes, involving gas ionization, ion recombination, flow, and various chemical reactions, as well as mutual couplings between some of them. Therefore, understanding the corona discharge process and ionic wind generation is crucial for researchers and engineers to better utilize this phenomenon in practical applications. In this review, the principles of corona discharge and its induced ionic wind are presented. Subsequently, ionic wind generators (IWGs) are discussed according to their applications, and the corresponding advances based on experimental studies and numerical simulations are also reviewed. Moreover, the challenges of transitioning the ionic wind technology from laboratory studies to practical applications are discussed. These challenges include the excessively high onset voltage of the corona, ozone emission, and influence of environmental conditions. Furthermore, the mechanisms of these barriers and several effective approaches for mitigating them are provided. Finally, some future research prospects and the conclusions are presented.
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