基于颗粒能量耗散模型的多相网格质点法的旋风分离器模拟  

Simulation of cyclone separator using multiphase particle in cell method based on particle energy dissipation model

作　　者：苏军伟[1] 王乐[2] 顾兆林[1] 张云伟[1] 

机构地区：[1]西安交通大学人居环境与建筑工程学院,西安710049 [2]西南交通大学土木工程学院,成都610031

出　　处：《环境工程学报》2016年第10期5735-5742,共8页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(21306145);国家重大科技专项(2016ZX05011001-002)

摘　　要：提出一种配合网格质点法的能量耗散模型,考虑颗粒之间碰撞引起的能量耗散效应以描述颗粒的团聚行为。采用该模型模拟的旋风分离器颗粒流发现:较其他模型具有较高的预测精度,模拟结果与实验吻合较好,验证了耗散模型可行。旋风分离器的中心形成负压区域,而在靠近壁面处形成高压区域。气相场呈现以中心为轴同转向不同流向的双螺旋结构,大部分颗粒被夹带到壁面附近,聚集在一起,形成聚团并产生分离,模拟结果发现旋风分离器在模拟条件下的分离粒径为1×10^(-5)m。This paper presents a particle energy dissipation model for multiphase particles in cell method（ MP-PIC）,which is used to describe the clustering behavior of particles due to energy dissipation during particle collisions. The numerical predictions of gas-particle dynamical behaviors in a cyclone separator with this model showed that the model proposed here is capable of making accurate predictions of the flow behaviors,and the numerical results agreed well with the experimental ones. A negative pressure area was detected at the center of the cyclone separator,while a high pressure area was found near the wall surface. The gas phase field had a doublehelix structure with the same rotation direction,but different flow directions between the outer-layer and central domain were apparent. Most of the particles were entrained to the wall surface,where they accumulated and clustered,and this resulted in better separations. Result of the simulations also showed that the diameter of the particle separation within the cyclone separator was 1 × 10- 5m at the present operating conditions.

关 键 词：多相网格质点法 颗粒耗散模型 旋风分离器 

分 类 号：X701[环境科学与工程—环境工程]