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首页> 外文期刊>Engineering Applications of Computational Fluid Mechanics >Moderator Flow Simulation Around Calandria Tubes of Candu-6 Nuclear Reactors
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Moderator Flow Simulation Around Calandria Tubes of Candu-6 Nuclear Reactors

机译：Candu-6核反应堆Calandria管周围的慢化剂流动模拟

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摘要

AbstractCFD simulations of cross-flows along in-line and staggered tube bundles which emulate those encountered in the calandria of CANDU-6 reactors are presented. The knowledge of external wall temperature distributions around calandria tubes is a major concern during normal and off-normal operating conditions of CANDU reactors. Calculations are performed using the FLUENT software with several turbulence models using segregated and Coupled algorithms. It is observed that κ-based models are able to reproduce mean velocities in staggered bundles. In most cases, the Coupled algorithm yields convergence even if it requires a longer computational time. Based on this work, the standard κ-ε model is recommended to perform this kind of simulations. Improved κ-ε models do not lead to better results while the κ-ω model predicts very well the physics only around the first row but it is unable to predict the flow around tubes located far downstream in the bundle.
机译：摘要提出了沿串联和交错管束的错流的CFD模拟，以模拟在CANDU-6反应堆的排管中遇到的错流。在CANDU反应堆的正常和非正常运行条件下，有关排管周围外壁温度分布的知识是一个主要问题。使用FLUENT软件使用分离和耦合算法的几种湍流模型进行计算。可以观察到，基于κ的模型能够再现交错束中的平均速度。在大多数情况下，即使耦合算法需要更长的计算时间，它也会产生收敛。基于这项工作，建议使用标准的κ-ε模型进行这种模拟。改进的κ-ε模型不会产生更好的结果，而κ-ω模型仅在第一行附近能很好地预测物理场，但无法预测束中更下游的管子周围的流量。

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