摘要
利用计算流体力学软件Fluent,对聚氨酯无卤阻燃墙体保温材料生产线上低压混合器内流场进行三维数值模拟,分析了混合器内流体的速度场、温度场、压力场分布。计算结果表明,混合器内混合段流体速度出现明显波动,有利于物料的混合。物料黏度不变时,随着转速增大混合区域不断减小;转速不变时,随着物料黏度增大混合位置区域不断增大。通过对温度场、速度场的分析,表明搅拌混合效果良好。
A low-pressure mixer, which was from the production line of a no-halogen frame- retarded polyurethane foam, had been simulated using the computational fluid dynamics software Fluent to conduct three dimensional numerical simulation. The characteristics of the flow field in the mixing equipment, which included the distributions of the velocity field, pressure field and temperature field in a normal working condition, had been investigated. The mixed location of the mixer was also studied with different material viscosities and different rotate speeds. The results illustrated that the flow field showed an obvious volatility change with a low-pressure mixer in the mixing period, which was conducive to the mixing of the materials. At a steady viscosity, the mixing location increased gradually with the increase of the rotate speeds. At a constant rotate speed, the mixing location gradually decreased with the increase of the viscosities. The results showed that the mixing effect was good and can achieve a fully mixing of the materials through the analysis of the temperature field and velocity field.
出处
《上海塑料》
2017年第1期40-45,共6页
Shanghai Plastics
基金
上海市自然科学基金资助项目(14ZR1420800)
关键词
计算流体动力学
低压混合器
无卤阻燃剂
数值模拟
computational fluid dynamics
low-pressure mixer
no-halogen flame-retardant
numerical simulation
