中文摘要：

进口边界条件是影响鼓泡流化床流体动力行为的重要因素之一。本文基于欧拉欧拉双流体气固两相流模型，对具有中心射流进口的鼓泡流化床进行了数值模拟研究。分别采用脉动和定常进口气体速度边界条件，对鼓泡流化床内气泡的形成、长大、分离，气泡的大小进行了分析和研究。模拟结果与Kuipers等的实验结果进行了比较，研究结果表明考虑进口速度的脉动能够更加合理地预测和分析床内流体动力行为。

英文摘要：

The inlet boundary condition is an important element of the hydrodynamic behavior of the bubbling ftuidized bed. Based on the Euler-Euler gas-solid two-fluid model, numerical simulation of bubbling fluidized bed with jet center inlet was studied. Using the pulse and steady velocity inlet boundary conditions, the formation, grow-up and separation of bubbles in the bubbling fluidized bed was analyzed and researched. Compared with the experimental result from Kuipers, the result of simulation shows that it is more reasonable to forecast and analyze the hydrodynamic behavior with the turbulence of the velocity inlet.