压力能驱动的自搅拌反应器流动特性数值模拟

提出了一种新型自搅拌管式反应器,并采用数值模拟方法对新型自搅拌溶出反应器内的流体流动特性进行了研究.在搅拌转速不变的情况下,研究了不同入口流速对反应器内部流体流动的影响.结果表明:不同流速下,反应器内部轴向流速整体分布均匀,但反应器入口和出口的流体,由于受到扰动作用速度偏大,且靠近出口的流速低于入口附近流速.径向靠近壁面处速度稍大,靠近搅拌轴处速度略小,说明搅拌桨叶端部对流体作用更大.入口流速为8.3 m/s时,更利于反应器内环流的形成.

Numerical Simulation on Flow Characteristics of Self-stirring Reactor Driven by Pressure Energy

A new kind of self-stirring tubular reactor was presented and numerical simulation approach was adopted to investigate the flow characteristics in the novel self-stirring leaching reactor. With the same agitation speed， the influence of inlet flow rate on fluid flow in the reactor was studied. The results show that， in different inlet flow conditions， the flow velocity distribution was uniform in the axial direction， but the velocities of fluids in inlet and outlet regions were higher due to the disturbance action， and the velocity in the outlet region was lower than that in the inlet region. In the radial direction， the velocity near the wall was higher and that close to the agitating shaft was lower， which shows that the impeller blade tip made a greater effect on fluid. The circulation flow in the reactor with stirring forms more easily under the flow rate of 8.3m/s.