论文部分内容阅读
采用1∶1循环高度的切片实验装置模拟压力容器外部冷却流道,通过向实验段注入空气模拟压力容器外部两相自然循环过程,采用自制电导探针对系统内的局部空泡份额分布进行实验测量和分析。实验结果表明:压力容器外部冷却流道内的两相流具有显著的局部分布特征,流道截面上的局部空泡份额类型从壁面峰值分布类型过渡到近壁面峰值分布类型,最终发展成为中心分布类型;液相和气相流量的敏感性分析表明,气相流量的大小对局部空泡份额分布特征有较大的影响。
A 1: 1 cycle height slice experimental device was used to simulate the external cooling channel of the pressure vessel. The experiment was conducted by injecting air into the experimental section to simulate the two-phase natural circulation outside the pressure vessel. The self-made conductivity probe was used to experimentally determine the distribution of the local void fraction in the system Measurement and analysis. The experimental results show that the two-phase flow in the external cooling flow channel of pressure vessel has a significant local distribution. The type of local bubble fraction in the cross-section of the flow channel changes from the peak distribution type to the near-peak peak distribution type, and eventually develops into a central distribution type The sensitivity analysis of liquid phase and gas phase flow shows that the size of the gas phase flow has a great influence on the distribution of the local void fraction.