空气放电离子风特性的研究

空气放电离子风技术在能源、环境、材料、军事等领域具有广阔的应用前景，采用粒子图像测速(particle image velocimetry, PIV)粒子测速系统得到了空气中尖–板电极放电产生的离子风速度场的图像，研究了相同电压等级正、负极性直流和工频交流电源下的离子风速度特性和流场分布情况并用离子碰撞、电流体动力学(electrohydrodynamic，EHD)顺电效应以及流体动力学相关理论进行了分析。最后采用红外热像仪测得了离子风对于发热体强化传热的作用，分析了离子风作用下发热体的温度分布特性。

Study on Characteristics of Ionic Wind From Atmosphere Discharge

The technique of ionic wind from atmosphere discharge has extensive application prospect to the areas of energy, environment, material and military etc. Making use of PIV (Particle Image Velocimetry) system, the ionic wind speed field images of discharges in air of tine-plate electrodes was obtained. The characteristics of ionic wind speed and the distribution of flow field have been investigated under power supplies, having uniform voltage, of the positive polarity DC, negative polarity DC and power frequency AC which has been adopted in the atmosphere discharge experiment, and by using the theories of particle collision, EHD (Electrohydro- dynamic) effect and hydrokinetics, were also analyzed. The effect of heat transfer enhancement caused by ionic wind on the heating unit was measured by thermal infrared imager, and the temperature distribution characteristic of the heating unit with ionic wind were analyzed for reference.