摘要
板壁水膜流动特性是影响水膜二次携带的主要因素之一。通过数值方法对某一规格板壁表面水膜波动流动特性进行研究。在对水膜表面进行受力分析的基础上,得出了水膜自由表面的动力学边界条件,建立了板壁水膜波动流动的数学模型。连续性方程采用中心差分格式,动量方程采用迎风和中心差分混合的偏心差分格式,采用Simple算法对板壁水膜波动流动方程进行了求解,采用流体界面追踪法(VOF:Vol-ume-of-Fluid)方法对水膜自由表面进行模拟追踪。计算结果表明,水膜在板壁中部的波动比其它部位剧烈,另外也发现入口扰动频率对水膜波动的影响程度要大于扰动振幅对水膜波动的影响。
The flowing characteristic of water film on wall is one of the main factors that influences the secondary droplets entrainment. This paper studies the flowing characteristic of water film on wall of certain sizes, using numerical method. Based on the analysis of water film surface forces, the dynamic boundary condition of water film free surface was obtained, and the wave flow models of water film on wall were established. The central-differencing algorithm was used for the continuity equation. And the blend of two-order upwind difference algorithm and central-differencing algorithm was used for the Momentum equation. SIMPLE and VOF algorithm were used to solver the wave flow of water film on wall. Calculation results showed that the water file waved more acutely in the middle of wall than other places, and the inlet interferential frequency influenced the wave flow of water film more intensively than the inlet interferential.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2006年第5期29-32,共4页
Nuclear Power Engineering
基金
空泡物理和自然循环国防重点实验室项目资助(51482150104Cb0101)
哈尔滨工程大学基础研究基金项目资助(HEUF040128)
关键词
水膜
波动特性
VOF方法
数值模拟
Water film, Wave flow characteristic, VOF algorithm, Numerical simulating
