CAJ | 학술논문

采用基于双流体模型与粒子分散模型相结合的方法,建立了一个用于描述气液固三相湍流流动的Eulerian/Eulerian/Lagrangian模型(简称E/E/L模型).在Euler坐标系中考虑了气液两相,利用双流体模型来表述气液两相的相互关系;同时在Lagrange坐标系中考察了颗粒的运动,并把颗粒对气液两相的影响耦合于双流体模型中.以流化床内气液固三相湍流流动为例进行的数值模拟结果与实验结果吻合良好.所提出的模型及其模拟具有很好的准确性和可靠性,为研究气液固三相湍流流动提供了一种新的途径.
채용기우쌍류체모형여입자분산모형상결합적방법,건립료일개용우묘술기액고삼상단류류동적Eulerian/Eulerian/Lagrangian모형(간칭E/E/L모형).재Euler좌표계중고필료기액량상,이용쌍류체모형래표술기액량상적상호관계;동시재Lagrange좌표계중고찰료과립적운동,병파과립대기액량상적영향우합우쌍류체모형중.이류화상내기액고삼상단류류동위례진행적수치모의결과여실험결과문합량호.소제출적모형급기모의구유흔호적준학성화가고성,위연구기액고삼상단류류동제공료일충신적도경.
A closed Eulerian/Eulerian/Lagrangian mathematical model(E/E/L model) for simulating gas-liquid-solid three-phase local flow was established by combining Two Fluid Model(TFM) and District Element Method(DEM).This model was based on the fundamental equations of fluid mechanics. The motion of particles was described in the Lagrangian coordinates, while the gas phase and the liquid phase were dealt with in the Eulerian coordinates.Based on IPSA and PSIC solution techniques, the program of simulating gas-liquid-solid local flow was achieved. The predicted results of local gas holdup and local solid holdup as well as local axial liquid velocity agreed well with the experimental data in gas-liquid-solid three-phase fluidized bed,and the applicability and reliability of this model were validated.