This paper presents a miniature ionic wind blower for active cooling by embedding the needle electrode into heat dissipation surface. Experiments with applied voltage ranging from 8 kV to 12 kV and with heating source temperature of the surface for 40 °C, 45 °C, and 50 °C are conducted. The observation of the ionic wind flow by using the PIV instrument shows a jet flow pattern that leaving the surface, which help to form a convective flow in the region near to the surface. This effect gives a maximum of 50 % improvement for average heat transfer coefficient of the surface by comparing to the condition of natural convection. Compared with the estimation of a semi-empirical correlation, the measured mass flow rate of the ionic wind blower becomes larger during the applied voltage is larger than 9 kV. This attributes to the air temperature variation that affected by the mass flow rate during the heat transfer process. In other words, the increased mass flow rate leads to a temperature drop of the airflow, which provides more molecules per unit of volume for a better condition of the corona discharge process. This phenomenon indicates a coupling effect between the air temperature and the corona discharge process. The experimental results of this study also provide a flexible way for modularized design of the miniature ionic wind blower.

本文提出了一种微型离子风机，通过将针状电极嵌入散热表面来进行主动冷却。进行了施加电压范围为 8 kV 至 12 kV 且表面热源温度为 40 °C、45 °C 和 50 °C 的实验。使用PIV仪器观察离子风流显示出离开地表的射流模式，这有助于在靠近地表的区域形成对流。与自然对流条件相比，这种效应使表面的平均传热系数最多提高 50%。与半经验相关性的估计相比，在外加电压大于 9 kV 期间，离子风机的测量质量流量变大。这归因于传热过程中受质量流量影响的空气温度变化。换句话说，增加的质量流率导致气流的温度下降，这为每单位体积提供更多的分子，从而为电晕放电过程提供更好的条件。这种现象表明空气温度和电晕放电过程之间存在耦合效应。本研究的实验结果也为微型离子风机的模块化设计提供了一种灵活的方法。这种现象表明空气温度和电晕放电过程之间存在耦合效应。本研究的实验结果也为微型离子风机的模块化设计提供了一种灵活的方法。这种现象表明空气温度和电晕放电过程之间存在耦合效应。本研究的实验结果也为微型离子风机的模块化设计提供了一种灵活的方法。