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针对紧密排列螺旋绕肋燃料组件开展阻力特性试验研究。试验结果表明:入口温度对组件的阻力特性无影响;拟合的阻力系数关系式与试验数据的偏差小于1%;Rehme关系式在低雷诺数时与试验数据吻合。采用BSL雷诺应力湍流模型对紧密排列螺旋绕肋组件进行数值模拟计算,获得了组件的阻力特性、速度分布、二次流,并与试验数据对比,偏差小于8%,表明采用的计算流体动力学(CFD)方法适用于预测紧密排列螺旋绕肋组件的阻力特性。
Aiming at the tight arrangement of helical winding fuel assemblies to carry out research on the resistance characteristics. The experimental results show that the inlet temperature has no effect on the resistance of the module, the deviation of the fitted resistance coefficient is less than 1% with the experimental data, and the Rehme equation is consistent with the experimental data at low Reynolds number. The BSR Reynolds stress turbulence model was used to simulate the helically wound rib assembly. The resistance characteristics, velocity distribution and secondary flow of the assembly were obtained and compared with the experimental data. The deviation was less than 8%, indicating that the computational fluid dynamics (CFD) method is suitable for predicting the drag characteristics of helically wound rib assemblies.