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对于近场核设施污染物大气转移和分散的降缩模拟方法,使用合的WRF-CFD降缩模型框架
Zhengming Li1, Yongjun Ye1, Xinyu Liu1
1School of Resources Environment and Safety Engineering, University of South China, Hengyang, 421001, China; National & Local Joint Engineering Research Center for Airborne Pollutants Control and Radioactivity Protection in Buildings, University of South China, Hengyang, 421001, China.
Journal of environmental radioactivity
|December 2, 2025
概括
一个新的缩小模型将天气研究和预测 (WRF) 与计算流体动力学 (CFD) 结合起来,用于准确的放射性污染物分散模型. 调整流常量可以提高性能,为核设施的环境评估提供了强大的工具.
科学领域:
- 大气科学 大气科学
- 环境工程 环境工程
- 核安全问题 核安全问题
背景情况:
- 由于可能释放放射性污染物,核设施存在风险.
- 大气分散模型对于评估这些风险至关重要.
- 现有的模型可能缺乏准确的近场影响评估的分辨率.
研究的目的:
- 开发和评估一个合的WRF-CFD降级模型,用于大气污染物分散.
- 通过调整流模型常量来提高微尺度模型的准确性.
- 为核设施环境影响评估提供可靠的工具.
主要方法:
- 将天气研究和预测 (WRF) 大尺度模型与微尺度计算流体动力学 (CFD) 模型相结合.
- 根据WRF的行星边界层方案调整微尺度流模型的闭合常量.
- 通过气象观测和SF6追踪器实验验验证合模型.
主要成果:
- WRF准确地复制了中大规模的风场,提供了可靠的CFD流入条件.
- 结合的WRF-CFD模型在模拟风形状和度分布方面表现出高精度.
- 稳定的流调整显著提高了下调模型的性能.
- 该模型捕获了与测量可比的峰值度大小,尽管在偏远地区稳定状态RANS的局限性.
结论:
- 拟议的WRF-CFD缩小策略使核设施附近污染物分散的可靠,高分辨率的模拟成为可能.
- 流常量调整是有效提高模型性能.
- 未来的研究应该探索短暂的方法,以更好地捕捉风柱因风剪变性的变化.
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