Abstract High temperature during electronic components operation can cause the failure of PN junctions of chips, and it can even damage the entire component. Ionic wind is a promising technique for heat dissipation due to its noiseless, compact structure and flexible design. In this study, needle-ring-type ionic wind devices with multi-needle electrodes connected in parallel are developed for cooling an electronic component. The effects of the number of needles, needle electrode material (tungsten and stainless steel), inter-electrode distance on the device output velocity and cooling performance are experimentally studied for a cylindrical heat sink mounted with a heating film. A full three-dimensional multi-physical numerical method, in which the coupled effects of the electric field, air flow, and heat transfer are considered, is also established. Mutual interference of the electric fields is identified between needle electrodes. The ionic wind velocity is determined by electric field strength and the angle between the ring axis and the line that connects the needle tip and the upper edge of the ring. The wind velocity first decreases and then increases with continuously increasing inter-electrode distance. Although the electrode material has an obvious effect on the ionic wind velocity of the free flow state, the heating film surface temperature is not sensitive to the needle material, whereas it is sensitive to the inter-electrode distance and the number of needles. The output wind velocity of the four-needle layout is larger than that of the three-needle layout despite backflow inside the ring. The heating film surface temperature is below 55 °C for the two designed electrode layouts, which is lower than the safety temperature of 70 °C. This study can serve as a guideline for developing multi-electrode ionic wind cooling systems.

中文翻译：

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多针电极放电离子风对电子元件的散热：实验和多物理分析

摘要 电子元件工作过程中的高温会导致芯片PN结失效，甚至会损坏整个元件。离子风具有无噪音、结构紧凑、设计灵活等优点，是一种很有前途的散热技术。在这项研究中，开发了具有并联连接的多针电极的针环式离子风装置，用于冷却电子元件。针对安装有加热膜的圆柱形散热器，通过实验研究了针数、针电极材料（钨和不锈钢）、电极间距对器件输出速度和冷却性能的影响。一种全三维多物理数值方法，其中考虑了电场、气流和传热的耦合效应，也成立。在针电极之间识别电场的相互干扰。离子风速由电场强度和环轴与连接针尖和环上边缘的线之间的角度决定。随着极间距离的不断增加，风速先减小后增大。虽然电极材料对自由流动状态的离子风速有明显影响，但加热膜表面温度对针材料不敏感，而对电极间距和针数敏感。尽管环内有回流，但四针布局的输出风速大于三针布局的输出风速。两种设计的电极布局的加热膜表面温度均低于55°C，低于70°C的安全温度。这项研究可以作为开发多电极离子风冷却系统的指南。