基于势流体的核反应堆贮液容器动力特性分析

Dynamic Characteristic Analysis for Liquid Storage Container in Nuclear Reactors with a Potential-Based Fluid Formulation

由于流-固耦合计算规模十分庞大,很少在工程中应用。本文采用势流体函数理论,将流-固耦合特征值方程的耦合项通过势函数联系,流体流动的非线性连续性方程可简化为线性椭圆方程,大大地缩减了流-固耦合计算的规模。通过实际的算例验证表明,采用基于势流体的流-固耦合方法求解贮液容器动力问题是十分高效的,适合在核反应堆工程中推广运用。

The calculation scale of fluid-structure coupling is so huge that it was rarely used in engi-neering.A potential-based fluid formulation is used in this paper.The formulation connects the coupling terms of the fluid-structure characteristic value equation,so nonlinear continuous equation of liquid flowing is simplified to linear elliptic equation.In this way,the calculation scale was reduced to a great extent.It was verified in many examples that the formulation is very efficient to solve the dynamic problem of liquid stor-age container,which can be used in nuclear reactor engineering.