Abstract
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.
Highlights
Ionic wind is generated when a high electric potential difference is applied between two electrodes with different surface curvature radii
The temperature of the heating film cooled by the ionic wind with different electrode layouts is presented and analyzed
In order to describe the characteristics of the corona discharge, this section presents the current–voltage characteristics of the ionic wind device with different distances between needle and ring electrodes and with three different needle-electrode layouts
Summary
Ionic wind is generated when a high electric potential difference is applied between two electrodes with different surface curvature radii. Due to its advantages, which include its noiselessness [1], no vibration, low power [2], rapid response, compact structure, and high heat transfer augmentation [3,4], ionic wind has shown great potential in the field of Light Emitting Diode (LED) cooling [5,6], food drying [7,8,9], and the inactivation of bacteria [10,11]. Ionic wind has attracted strong interest from many researchers, and many ionic wind devices with a new concept of electrode configurations have been developed for the cooling of LEDs and other electronic equipment [12]. Shin et al [15] developed a new cooling device using wire to parallel-plate-electrodes to produce ionic wind for cooling an LED. The emitting electrode is a wire, and the collector electrodes
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