平行流冷凝器百叶窗翅片结构优化

Structure optimization of louver fin of parallel flow condenser

建立平行流冷凝器百叶窗翅片的三维流动和换热模型,并对不同迎面风速下百叶窗翅片的流动和换热性能进行数值模拟,计算结果与试验结果具有较好的一致性,验证计算模型和方法的正确性。在此基础上,建立8种结构形式的百叶窗翅片模型,并对其空气侧的换热和流动过程进行仿真,分析结构形式和排列方式对百叶窗翅片换热量和空气阻力的影响,结果表明:增加开窗区域数能够有效提高翅片的换热性能,增加百叶窗的转向区数目能够有效降低进出口的压降。

The three-dimensional flow and heat transfer model of louver fin of parallel flow condenser is established,and the numerical simulation is carried out to study the flow and heat transfer performance of louver fins under different air frontal velocity.The calculated results are in good agreement with the experimental ones,which verifies the model and method.Furthermore the air-side heat transfer and flow characteristics of eight types of louver fins are investigated.The impact of structure and layout modes for louver fins on heat transfer and pressure drop is analyzed.The results show that increasing the number of window area can effectively improve the heat transfer performance.At the same time,increasing the number of turning areas can effectively reduce the pressure drop of outlet and inlet.