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通过Hollway的实验结果对格架计算流体力学(CFD)分析模型进行校验,在此基础上开展了两组分别具有分开式和撕裂式搅混翼的5?5格架棒束通道CFD模拟分析。引入场协同理论对两组CFD模拟结果进一步分析,结果表明:协同角的场分布特性可以很好地解释搅混翼对燃料组件强化换热的作用机理。如果不考虑搅混翼所带来的压降损失大小,撕裂式搅混翼比分开式具有更好的强化换热效果;分开式搅混翼的折弯角增加不会显著改善换热特性,而且角度过大时换热特性有下降的趋势。
Based on the experimental results of Hollway, the computational fluid dynamics (CFD) analysis model was calibrated. Based on the results, two sets of CFD simulation of 5? . The field synergy theory is used to further analyze the CFD simulation results of two groups. The results show that the field distribution characteristics of the synergetic angle can well explain the mechanism of the mixing wing on the enhanced heat transfer of fuel assemblies. Without considering the pressure loss loss caused by the mixing wing, the tear-type mixing wing has a better heat transfer enhancement than the split-type; the increase of the bending angle of the split-type mixing wing does not significantly improve the heat transfer characteristics, and the angle Excessive heat transfer characteristics have a downward trend.