涡轮反应器气固两相流动反应CFD模型数值模拟

Numerical Simulation on Gas-solid Two-phase Flow Reaction of Vortex Reactor

根据涡轮反应器气-固两相流动反应模型,对涡轮反应器中流动、传热、传质和反应进行了系统的数值模拟,得到了各种条件下的颗粒轨迹图、温度分布图、密度分布图、涡轮反应器内连续相(气固混合相)的速度矢量图、轴向速度图、径向速度图、切向速度图、湍流强度分布图和气相湿度图。模拟结果表明:涡轮反应器内物料的运动为强湍流-涡旋流运动;内部的温度分布非常有规律,沿着径向和轴向均存在温度梯度;速度分布和转子叶片的安装角度有着较大的关系,而与热油温度无关;在进口处的速度较大,而后慢慢趋于平缓并达到一个稳态。

Numerical simulation on the inner flow,heat transfer,mass transfer and cracking reaction in vortex reactors was carried out with gas-solid two-phase flow-reaction model.The detailed information of flow field,temperature field and concentration field of vortex reactor was obtained.Results showed that the motion of particles was cork screw path.The temperature in vortex reactors had certain rule and temperature gradient in axial and radial direction.The distributions of velocity had relations with different angles of rotor blade and no relations with hot oil temperature.The entrance velocity of vortex reactors was bigger and later flattens.