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以2×2放大棒束通道格架模型为基础,利用粒子图像测速(PIV)对格架搅混翼引起的燃料组件棒束通道内横向流场特性进行实验研究。测量流体经过格架搅混翼后不同位置的横向速度发展情况,比较折弯角分别为20°、25°、30°、35°、40°和45°时横向流场的变化情况,给出雷诺数对横向流场的影响。获得4个典型雷诺数(Re为33000、36000、40000、45000)下的流场特性。结果表明,Re和搅混翼折弯角度的改变,都会显著影响棒束通道内横向流动。
Based on the 2 × 2 magnified bundle channel model, the particle flow velocities (PIV) were used to study the transverse flow field characteristics of the fuel bundle in the fuel bundle caused by the grids. The transverse velocity development of the fluid passing through the lattice mixing wing was measured. The transverse flow field was compared when the bending angle was 20 °, 25 °, 30 °, 35 °, 40 ° and 45 ° respectively. Effect of number on lateral flow field. Four typical Reynolds numbers (Re, 33000, 36000, 40000, 45000) flow field characteristics were obtained. The results show that the bending angle of Re and the mixing wing changes the transverse flow in the bundle passage significantly.