计算流体力学应用于子通道分析的初步方法研究

多尺度耦合分析是目前开展反应堆安全分析的一种趋势，常规的多尺度耦合是将不同程序通过一公共耦合平台实现数据间的传递和交换。本文提出一种新的多尺度耦合思路，认为基于相对小尺度的分析手段可扩展应用至大尺度，并用计算流体力学（CFD）应用于子通道尺度的数值模拟方法进行验证。验证结果表明，该方法具有一定的合理性，但这种方法对湍流交混能力的考虑仍存在欠缺，还需进一步改进。

Preliminary Research on Applying Computational Fluid Dynamics to Subchannel Analysis

Multi-scale coupled simulation has become a trend in performing nuclear reactor safety analysis. The routine method is to combine different codes together by a common platform for data exchange and delivery. In this paper, a new thought was proposed that the analysis technique developed at relatively small scale could be extended to large scale and it was verified with the application of CFD method to perform the subchannel scale analysis. The result confirms its reasonability in a sense, however, it needs further improvement since it doesn’t account for the turbulent mixing between the adjacent subchannels properly.