不同构型电晕放电离子风强化传热的数值模拟研究

Numerical simulation of heat transfer enhancement by corona discharge ionic windwith different configurations

为了探索不同构型下离子风的传热性能,针对3种不同结构的离子风装置进行数值模拟,分析电压、电极高度与散热片宽度对平均风速、换热系数以及功率的影响规律。计算结果表明,电压的增大可以提升离子风的强化传热效果,但是消耗的功率也会逐渐增大,其中线-板型功率增大的幅度最大;电极高度越小,离子风的强化传热效果越好;当散热片的宽度比较小,散热需求比较低时,由于直接接地型电极的功率较小,所以其更加适用。研究结果对不同情况下的离子风结构选型提供了参考。

In order to investigate the heat transfer performance of ionic wind under different configurations,numerical simulation of three ionic wind devices with different structures was performed,and effects of voltage,electrode height and fin width on average wind speed,heat transfer coefficient and power were explored.The results show that voltage increase can improve heat transfer enhancement of ionic wind,but power consumption increases with the wire-plate type the highest power consumption.Smaller electrode height resulted in better heat transfer enhancement.Moreover,the direct grounding type electrode is found more suitable for short heat sink width and low heat dissipation demand due to its low power consumption.The results provide an important reference for the selection of ionic wind structures under different conditions.