基于场协同理论的翅片板结构强化传热机理研究

his paper analyzed the heat transfer and flow characteristics of serrated fin in finned plate heat exchanger numerically. For exploring the heat transfer enhancement mechanism of serrated fin in finned plate heat exchanger, the three dimensional numerical model was established to examine the plate spacing, the temperature gradient field, velocity field and fields synergy. The results show that: the secondary flow was formed because of the strong disturbance of fins in the finned plate channel, the temperature field and velocity distribution was uniform. Along the flow direction, the average field synergy angle of the inlet is smaller than the other region and levels off when the flow is fully developed. In this paper, the plate spacing plays a key role in the heat transfer performance, the heat transfer performance is optimal when the plate spacing is 8mm. However, the heat transfer performance will descend whether the plate spacing is too big or too small.