扁平翅片管数值模拟及其结构优化

Numerical Analysis and Structure Optimization on the Flat Tube

蛇形扁平管换热器在空冷电站的应用上取得了很好的效果,为进一步提高空冷电站凝汽器的冷凝效率,优化扁平管翅片的物理结构,建立了蛇形翅片扁平管换热器及直翅片和带扰流孔直翅片扁平管换热器通道的三维物理数学模型,利用FLUENT软件进行数值计算。通过对对流换热系数、流动损失、散热量的对比分析,结果表明:蛇形翅片扁平管翅片的物理结构存在进一步的优化空间的可能性,直翅片扁平管具有更优越的冷凝效率,模拟结果为直接空冷凝汽器的设计和优化改造提供了科学依据。

The wave-fin flat tube condenser is well applied in direct-cooled power plants, to improve the efficiency of directcooled condenser and optimize the physical structure of flat tube fin, applying the 3D physics-mathematics models; the numerical analysis is performed by Employing a Fluent solver on the flat wave-finned tube and the flat vertical-finned tube with and without the wake interrupted holes. By comparing convection heat transfer,flow expense and quantity of heat, the fin structure of flat wave-finned tube could be farther optimized, flat vertical-finned tube is more efficient in condensation. It provides a scientific basis for design and optimization of direct air cooled condensers.