增压空冷器用开缝翅片的结构优化设计

利用粒子图像测速技术和红外热成像技术，对增压空冷器用圆弧型和X型开缝翅片空气侧的流动和传热特性进行了可视化实验研究．在实验的雷诺数（800-3400）范围内，得到了阻力和换热特性曲线，以及能反映流动和传热微观特性的流场和温度场．实验结果表明，圆弧型开缝翅片的阻力小于X型开缝翅片，并且前者在强化圆管背风侧的换热特性方面优于后者，但后者整体的场协同性和换热性能优于前者．结合两种翅片的优点，优化设计出了一种新型的开缝翅片（X圆弧型）．对3种开缝翅片的流动和换热特性进行了数值模拟。模拟结果与实验结果吻合得很好．模拟结果表明，优化后的X圆弧型开缝翅片的场协同性、换热性能均优于前两种翅片．新翅片在考虑了阻力因素后的综合换热性能较圆弧型开缝翅片提高了7％～15％，较X型开缝翅片提高了3％～9％．

Configuration Optimization Design for Slotted Fin Surfaces in Pressurized Air Cooler

Air side heat transfer and fluid flow characteristics of slotted fin surfaces with arc-type and X-type strip arrangement in a pressurizing air cooler were studied by visualization experiments.Experiments were conducted out by a particle image velocimetry(PIV) system and an infrared thermo tracer to visualize the flow field and the temperature distribution of two slotted fin surfaces.The experimental results show that the pressure drop of the arc-type slotted fin surface is lower than that of the X-type slot...