CAJ | 학술논문

颗粒物聚并技术是强化对超细颗粒粉尘收集的有效方法。基于FLUENT软件对聚并器内流场和颗粒轨迹进行了数值模拟。对流场模拟的结果表明,聚并器内的涡发生装置可以产生不同尺度的涡,为超细颗粒的碰撞聚并创造了条件。分别在不同流速、不同粒径以及有无荷电的情况下模拟颗粒在聚并器内的运动情况。结果表明,流速越大,颗粒受湍流影响越大,发生碰撞聚并的几率也就越大;大颗粒受湍流影响较小,小颗粒较容易受到湍流的影响,从而大小颗粒之间发生明显的相对运动,增大碰撞聚并几率;荷电可以使粒子间的引力明显增强,使湍流对粒子运动的影响更明显,有效地增加粒子的碰撞几率。
과립물취병기술시강화대초세과립분진수집적유효방법。기우FLUENT연건대취병기내류장화과립궤적진행료수치모의。대류장모의적결과표명,취병기내적와발생장치가이산생불동척도적와,위초세과립적팽당취병창조료조건。분별재불동류속、불동립경이급유무하전적정황하모의과립재취병기내적운동정황。결과표명,류속월대,과립수단류영향월대,발생팽당취병적궤솔야취월대;대과립수단류영향교소,소과립교용역수도단류적영향,종이대소과립지간발생명현적상대운동,증대팽당취병궤솔;하전가이사입자간적인력명현증강,사단류대입자운동적영향경명현,유효지증가입자적팽당궤솔。
The technology of particles aggregation is a kind of effective method to strengthen the ultrafine particles collection.The flow field of the turbulence coalescence device was simulated by FLUENT,and the results show that both big and small vortex chips are good at producing vortices,which could creat favorable conditions for the collisions and coalescence of the ultrafine particle.The simulation of the ultrafine particles trajectories which carried out at different velocity,different size and charged or not,led to a regular conclusion： the faster the velocity is,the larger particles affected by the turbulence,and it is easier for the collisions and coalescence;large particles are less effected by the turbulence,while the small ones are effected more,so there is an apparent relative motion between them;the attractive force between particles increases as the particles are charged,which make it easier for the collisions and coalescence.