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选择单组件瞬间全堵事故作为分析对象,并选取法国SCARABEE系列实验中的BE+1实验进行模型验证,事故模拟中的钠沸腾模型运用两流体六方程模型,子通道的径向和轴向网格均采用交错网格法进行网格划分,模型求解中针对子通道横向速度处理不足的缺点,根据拉梅算子展开原理提出改进方案,并通过对BE+1实验的模拟,验证模型改进的合理性。
The instantaneous total blockage of single component was selected as the analysis object. The BE + 1 experiment in SCARABEE series of France was selected to verify the model. The sodium boiling model in accident simulation was simulated by two-fluid six-equation model. The radial and axial net of subchannel The grids are all meshed by staggered grid method. In order to solve the shortcoming of sub-channel lateral speed processing in the model solving, an improved scheme is proposed according to the expansion principle of the Lame operator, and through the simulation of the BE + 1 experiment, the improved model rationality.