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采用DANTEC 55X两维激光多普勒测速仪对反应堆燃料组件棒束流场进行了测试,获得了其不同断面处的紊流速度分布及湍流特性,并进行了理论模型计算分析,试验结果与理论计算及他人实验结果符合较好。试验模型为一正方形排列的4×4棒束,节距比S/d=1.315。测量断面位于中间支撑板上下游,测量的轴向速度正方向与水流方向一致,试验
The DANTEC 55X two-dimensional laser Doppler velocimeter was used to test the flow field of the fuel bundle in the reactor. The turbulent velocity distribution and the turbulent flow characteristics were obtained at different sections of the reactor. The theoretical model was calculated and analyzed. The experimental results and the theory Computation and other experimental results in good agreement. The experimental model is a square array of 4 × 4 rods with a pitch ratio of S / d = 1.315. Measurement section is located in the middle of the support plate upstream and downstream, the measured axial velocity is consistent with the direction of the water flow, the test