在双相系统中使用玛辐射和MCNP6代码开发空虚分数的分析方程
W L Salgado1, R S F Dam1, C M Salgado1
1Instituto de Engenharia Nuclear - (IEN), Rua Hélio de Almeida 75, 21941-906, Cidade Universitária, RJ, Brazil.
概括
新的数学方程使用玛密度计准确计算管道中的空积分. 这种方法通过模拟验证,为双相流系统提供精确的测量.
科学领域:
- 核工程 核工程是指核工程.
- 流体动力学 流体动力学
- 计算物理 计算物理
背景情况:
- 准确的空隙分数测量对于在工业过程中表征二相流动至关重要.
- 现有的空分数确定方法可能很复杂或缺乏精度.
- 玛密度测量为流体性能分析提供了一种非侵入性的方法.
研究的目的:
- 开发和验证使用马密度计计算管道中空隙分数的新数学方程.
- 评估这些方程在各种管道几何形状和流量模式中的准确性.
- 将新方程的性能与现有的文献方法进行比较.
主要方法:
- 使用MCNP6代码的蒙特卡洛模拟被用来建模一个-137 (Cs-137) 源和化 (化) [NaI(Tl]) 检测器的密度测量设置.
- 双相水气流模型被模拟在不同直径的方形和圆柱形管中.
- 使用Americium-241 (Am-241),Cesium-137 (Cs-137) 和Cobalt-60 (Co-60) 源进行的马射线传输测量用于验证空虚分数计算方程.
主要成果:
- 从模拟的马射线传输光点中计算的空隙分数与模型中的实际空隙分数非常接近.
- 开发的方程显示了高精度,最大的平均相对误差为只有0.21%的圆柱形管.
- 这些方程在分层和环状流量系统中表现良好,表明了稳定性.
结论:
- 提出的数学方程提供了一种可靠和准确的方法,通过马密度计来确定管道中的空隙分数.
- 这种方法对各种管道几何形状,辐射源和流量条件有效.
- 这些发现有助于改善双相流系统的监测和控制.
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