基于Fluent的气固喷射器三维数值模拟研究  

Three-Dimensional Numerical Simulation of Gas-solid Injector based on Fluent

作　　者：石莹 林显臣 

机构地区：[1]烟台工程职业技术学院,山东烟台264006

出　　处：《选煤技术》2011年第4期19-23,82,共5页Coal Preparation Technology

摘　　要：根据CFD和仿真思想,采用标准k-ε湍流模型,并利用拉格朗日法和欧拉法相结合的三维数值模拟技术,对气固喷射器内的流场和颗粒行为进行了数值模拟研究。对固体颗粒采用了离散相模型,考察了气固两相间的相互耦合[1]作用,结果表明:在该喷射器的接收室中,喷嘴管道周围的一些无效区域内有颗粒的聚集和停留,流场的湍动能在喷嘴出口区域周围达到最大值。其主要原因在于,喷射器中心高速射流区域周围产生了明显的回流现象,固体颗粒的加入对气体流动情况产生了一定影响,气体流场随后逐步稳定。According to CFD and the idea of simulation,using standard k-turbulent model,and three-dimensional numerical simulation technique together with the LaGrange and Eulerian methods,does numerical simulation study on the flow field and the action of particles in gas-solid injector.Use discrete phase model on solid particles,and consider the gas-solid two-way coupling effects.The result indicates that there are particles accumulating and remaining in some useless region around the pipe of nozzle in the receiving room of the injector.The turbulent kinetic energy of flow field comes to maximum value at the positions around the area of nozzle exit.The main reason is that evident reflow phenomenon happened around the high-speed jet region in the center of the injector.The injection of solid particles altered the state of gas flow and the flow field step to tranquilization after that.The result of the study have guiding significance on engineering apply.

关 键 词：气固喷射器 计算流体力学 FLUENT 数值模拟 离散相模型 

分 类 号：TK511.3[动力工程及工程热物理—热能工程]