波型板分离器竖直板壁水膜流动研究

波型板分离器板壁的水膜流动特性影响分离器内二次水滴的生成．采用数值方法对波型板分离器板壁水膜流动特性进行研究，通过分析波型板板壁水膜流动的特点，并对流动水膜进行合理的假设和简化，建立了波型板板壁水膜流动的物理模型和数学模型。采用有限容积法．对流项采用二阶迎风格式，扩散项采用中心差分格式，对控制方程进行离散，采用ADI（Alternating—Direction Implicit）方法对离散方程进行求解数值研究得出在主流汽体横掠波型板汽水分离器竖直板壁情况下，板壁水膜厚度、平均速度等参数与汽流流动速度和沉降率之间的关系。

Numerical Simulation of Water Film Flowing on Corrugated Separator Plate

The effect of separator corrugated-plate water-film flow on the forming of secondary droplets was studied by numerical method. By analyzing the flow character of water film on separator corrugated plate, and using reasonable simplifying and hypothesis, water film physical model and mathematical model were developed. Using finite volume method, convection term was discretized with two-order upwind dif- ference algorithm, and diffusion term was discretized with central difference algorithm. ADI (Alternat- ing-Direction Implicit) solution was used. By numerical simulating movement of water film on separa- tor-corrugated plate, under main steam transverse sweep situation, the relations between the water film pa- rameters and wet steam velocity, humidity had been obtained.