科研之友
微信
新浪微博
Facebook
分享链接
摘要
In this work, the velocity and temperature fields of EHD-enhanced convection heat transfer are obtained by means of numerical simulation. The mechanism of the EHD heat transfer enhancement is analyzed according to the field synergy principle. In this model, corona wind is generated in a wire-plate electrode configuration, and the working gas is air. The plate electrode is vertical and also serves as a heat sink. The results show that the synergy degree between the velocity and temperature gradient fields is very low in natural convection. In the case of the singlewire electrode, EHD force increases the air velocity and improves the degree of the field synergy in the upper half of the flow channel, which leads to the average heat transfer coefficient is increased to 2.3 times that of natural convection. By optimizing the number of the wire electrode to 3, the air velocity and field synergy degree are further improved. As a result, the average heat transfer coefficient is increased to 5.2 times that of natural convection.
- 单位
