自搅拌反应器内液相流动的数值模拟

摘要 采用数值模拟方法研究了压力能驱动的自搅拌反应器内液相流场的分布规律.首先对标准κ-ε模型、RNG κ-ε模型、realizable κ-ε模型下的模拟结果与PIV实验结果进行对比，确定了合适的湍流模型;然后研究了不同入口压力、液位高度对反应器内流场分布的影响.结果表明:标准κ-ε模型能更精确地模拟该反应器内的流场分布，反应器内流场稳定时间为12s以上.增加入口压力和液位高度均有利于反应器内流体速度均匀分布，入口压力为3MPa时几乎不存在速度死区.
Abstract：The distribution of liquid phase flow field in a self-stirring reactor driven by pressure energy was studied by numerical simulation method. Firstly， the appropriate turbulence model was determined by comparing the simulation results of the standard k-ε model， RNG k-ε model， and realizable k-ε model with the PIV experimental results.Then the influence of inlet pressure and liquid level height on the fluid field distribution in the reactor was studied. The results showed that the standard k-ε turbulence model can accurately simulate fluid field distribution of the reactor， and the stable time is more than 12 s. Increasing inlet pressure and liquid height is favorable to the even distribution of fluid velocity in the reactor， and there is almost no dead zone of velocity when inlet pressure is 3MPa.