开口盛液容器中气体喷射过程的数值模拟

Numerical Simulation of Gas Injection in an Opening Vessel Filled with Liquid

文章以铁水氮气喷吹镁粉脱硫过程为研究背景,忽略脱硫反应以空气在水中的喷射过程为替代模型,建立盛液容器中气体喷射过程的非稳态Eulerian多相流模型,在Fluent平台上对气液两相混合过程进行数值模拟,以预测气液两相体积、速度和温度分布。研究结果表明,由于气体受浮升力和粘性曳力的影响,气体到达液相的范围有限,但对自由液面的影响较为明显;多枪气体喷射能够有效增加对液体的扰动和对液体有一定的降温效果。

In the present paper, with the research background of the molten iron desulfurizing by magnesium powder blowing of nitrogen and neglect of the desulfurizing reaction, the transient multiphase flow of Eulerian model for gas injection in a liquid vessel is established with a substitute model of air injecting into water in an opening vessel. The two-phase mixing process is numerically simulated on the platform of Fluent to predict the distributions of the volume of the two-phase, velocity, and temperature. The numerical results show that gas phase reaches the limited region of the liquid phase due to the influences of the buoyancy and viscosity force but it has great influence on the free liquid surface. Multi-gas injections can effectively increase the liquid turbulence and has somewhat effect on liquid cooling.