切向进气船用脱硫塔流场的数值模拟研究

Numerical Simulation Research on the Flow Field of Marine Desulfurization Tower for Tangential Air Admission

针对船用脱硫塔塔内喷头数量的选择和喷射角度的问题,以船用六缸两冲程G128ZC型柴油机额定工况下排放的废气为研究对象,通过建立切向进气船用海水脱硫塔模型,采用Gambit软件对该模型进行网格划分,使用Fluent软件对该塔塔内气的流湍流强度和流速进行计算。仿真计算结果表明:切向进气船用海水脱硫塔塔内气流的流速和湍流强度呈规律性分布,整体塔内气流流向为旋转上升,塔内的同一水平面内的气流流速越靠近塔壁流速越大,反之越小;塔内中下部湍流强度高,上部湍流强度低,湍流强度沿着塔高方向逐渐减弱。该仿真结果为船用脱硫塔塔内喷淋方向的布置和喷头数量的选择提供了理论依据。

Aiming at the problem of the choice and arrangement angle of sprinklers in marine desulfurization tower, the exhaust gas discharged under the rated condition of six-cylinder two-stroke G128ZC marine diesel engine is taken as a research object. The model of marine desulfurization tower for tangential air admission was established. The model was meshed by gambit software and the turbulent intensity and velocity Of gas flow in the tower were calculated by fluent software. The simulation results show that the airflow velocity and turbulence intensity in the tower marine desulfudzation tower for tangential air admission are regularly distributed, and he flow of exhaust gas in the tower rises for rotation, the airflow velocity in the same horizontal plane in the tower is closer to the wall flow velocity Large, on the contrary smaller. Turbulent intensity in the middle and lower part of the tower is high, the intensity of the upper turbulence is low, and the intensity of the turbulence is gradually decreased along the tower height. The simulation results provide a theoretical basis for the arrangement of spray direction and the choice of nozzle number