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Updated: May 24, 2025

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Experimental Multiscale Methodology for Predicting Material Fouling Resistance
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应用URANS模拟和实验验证轴流诱导振动在核应用的不端悬臂杆杆的核应用
Anas Muhamad Pauzi1, Hector Iacovides1, Andrea Cioncolini2
1School of Engineering, The University of Manchester, Manchester, M13 9PL UK.
概括
本研究提出了一种经过验证的数值方法,用于预测核反应堆燃料棒中的流量诱导振动 (FIV). 该方法准确地模拟了振动频率和振幅,这对于防止燃料故障至关重要.
科学领域:
- 核工程 核工程是指核工程.
- 计算流体动力学的流体动力学.
- 机械振动 - 机械振动
背景情况:
- 由流动诱导振动 (FIV) 引起的摩擦磨损是轻水核反应堆燃料故障的主要原因.
- 准确预测FIV对于确保核燃料棒的完整性和安全性至关重要.
研究的目的:
- 开发和验证一个数值方法来预测FIV在杆杆杆在轴流水下.
- 为了研究自我激发的FIV的主导振动频率和振幅.
- 评估流模型和离散方案对模拟准确性的影响.
主要方法:
- 使用强大的双向流体结构相互作用 (FSI) 模拟与高效的计算方法.
- 用专门的实验验证数值方法的验证.
- 评估两个不稳定的雷诺兹-平均纳维尔-斯托克斯 (URANS) 流模型 (k-ω SST和Launder,Reece和Rodi RSM) 以及各种离散方案.
主要成果:
- 数字方法可靠地预测了从自由端到固定端的轴流动的振动频率和振幅 (雷诺德数 16.4k61.7k).
- 无论流动方向如何,都能准确地预测振动频率.
- 复制精确的不稳定流动行为,特别是在流量分离区域,在逆流方向下证明具有挑战性.
结论:
- 开发的数值方法对于预测核反应堆核心相关的配置中的FIV是有效的.
- 精确模拟不稳定的流动行为,特别是在分离区域,对于预测FIV振幅至关重要.
- 固态域和FSI合的适当优化是准确频率预测的关键.
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