CAJ | 학술논문

为研究气液分离器内使用的折板式捕雾器的流场特性及排液槽对其性能的影响，利用流体动力学计算软件Fluent，采用Low-Re Stress-Omega模型和DPM两相流模型，对捕雾器气液两相流流场进行了数值模拟。通过对比安装排液槽前后捕雾器内流场，分析了排液槽对捕雾器流场速度、液滴运动轨迹的影响；发现排液槽能大幅提高捕雾器的除雾效率，10μm以上液滴基本能够全部去除，但是也会使除雾器压降急剧增大。最后研究了排液槽主要结构参数--折弯直径和长度对捕雾器性能的影响，发现增大排液槽折弯直径和长度均能增加除雾效率，但同时也会增大进出口压降。
위연구기액분리기내사용적절판식포무기적류장특성급배액조대기성능적영향，이용류체동역학계산연건Fluent，채용Low-Re Stress-Omega모형화DPM량상류모형，대포무기기액량상류류장진행료수치모의。통과대비안장배액조전후포무기내류장，분석료배액조대포무기류장속도、액적운동궤적적영향；발현배액조능대폭제고포무기적제무효솔，10μm이상액적기본능구전부거제，단시야회사제무기압강급극증대。최후연구료배액조주요결구삼수--절만직경화장도대포무기성능적영향，발현증대배액조절만직경화장도균능증가제무효솔，단동시야회증대진출구압강。
To study the flow field characteristics of folded plate demister that is used in the gas-liquid separator and the influ-ence of drainage channels on its performance,a numerical simulation of the two phase flow filed of the folded plate demister is car-ried out using CFD software Fluent. The turbulence simulation is based on Low-Re Stress-Omega model and multiphase flow simula-tion is based on DPM model. The drainage channels’influence on velocity and motion track of liquid drops is obtained by compari-son of flow field of demister with and without drainage channels,and the results show that drainage channels can improve separation efficiency so considerably that almost all of the droplet bigger than 10μm can be removed,but it’ll increase pressure drop sharply at the same time. Furthermore,the structural parameters of the drainage channels,bending diameter and length,are changed to study the influence on the performance of the demister. The results indicate that increasing the bending diameter or length of drain-age channel both can improve separation efficiency ,but it will increase the pressure drop at the same time.