大气颗粒在复杂地形上的分散:羽毛轨迹和模型优化
Deyi Chen1, Xiuhuan Tang2, Longbo Liu2
1Institute of Nuclear Fuel Cycle and Materials, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; National Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an, 710024, China.
Journal of environmental radioactivity
|February 13, 2026
概括
复杂的地形显著影响核设施的放射性颗粒分散. 风洞测试和CFD模拟揭示了山脊和山丘如何改变羽毛的行为,从而实现了优化的分散模型.
科学领域:
- 环境科学 环境科学
- 核工程 核工程是指核工程.
- 大气科学 大气科学
背景情况:
- 来自核设施的放射性颗粒在大气中的分散对环境和公共健康至关重要.
- 复杂的地形显著影响放射性颗粒的分布模式.
- 理想化的地形,如山脊和山丘,用于研究地形对分散的影响.
研究的目的:
- 通过风洞实验和CFD模拟,研究在理想地形上的放射性颗粒散射轨迹.
- 系统地分析地形尺寸,类型和污染物释放参数的影响.
- 开发和优化CFD模型,以便在复杂的地形中准确地预测分散.
主要方法:
- 综合方法将风洞实验与激光片可视化和计算流体动力学 (CFD) 模拟相结合.
- 关键参数的系统变化:地形尺寸,类型,释放高度和污染物位置.
- 对CFD模型与实验数据的验证和模型常数的优化.
主要成果:
- 与平坦地形相比,二维山脊增强了羽毛升高;影响因山脊位置和高度而异.
- 围绕三维山丘的侧向流减少了它们对羽毛孔轨迹的影响,对山丘高度的敏感性有限.
- 大山块阻断了分散,降低了向下风的度;更高的释放点和更远的距离减少了地形的影响.
- CFD模拟显示了与平面地形常数的差异;优化的常数提高了复杂地形的准确性.
结论:
- 地形复杂性,包括山脊和山丘,显著改变了放射性颗粒分散模式.
- 优化的CFD模型常数对于在复杂地形上准确的分散建模至关重要.
- 了解这些影响对于环境监测和核设施周围的公共安全至关重要.
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