【摘要】 压水堆燃料组件格架上交混叶片的大小和形状影响其交混能力和流动阻力。介绍了格架交混性能优化设计的过程和结果,并用三维计算流体力学(CFD)软件对设计的3种格架方案进行了三维流场分析和比较。结果表明,就最高流体温度和流体最大温差而言,方案3比方案1和方案2的交混性能略好;就典型通道平均温度而言,方案1和方案2比方案3的交混性能好。更多还原

【Abstract】 Fuel assembly grids of pressurized water reactor strengthen the coolant mixing around fuel rod through mixing structure.The size and shape of mixing vane affects the mixing performance and flow resistance.This paper introduces the process and result of grid mixing performance optimizing design.Using CFD software,three dimensional flow field of three grid design schemes are analyzed and compared.The results show that the mixing performance of scheme 3 is better than that of scheme 1 and 2 in terms of the highest fluid temperature and the most difference in temperature.And mixing performance of scheme 1 and 2 is better than that of scheme 3 in terms of typical channel average temperature.更多还原