CAJ | 학술논문

撞击距离和出口管径是撞击流反应器中的两个关键尺寸。为探讨撞击距离和出口管径对颗粒撞击效果的影响，分别对撞击距离为1、2、3、4 mm 和出口管径为0．5、1．0 mm 这几种不同工况下的反应器内的流场进行了研究。首先采用 ANSYS 对不同的流体模型进行前处理，然后利用 Fluent 对反应器进行模拟优化分析。模拟认为：在相同的高压下，当撞击距离为2 mm，出口管径为0．5 mm 时，反应器内的撞击速度可达到最大，对颗粒的粉碎效果最佳，采用四喷嘴对置式微型撞击流反应器制备的微乳液90％以上的颗粒直径都在1．701μm 以下，已基本达到微米级颗粒的制备要求。
당격거리화출구관경시당격류반응기중적량개관건척촌。위탐토당격거리화출구관경대과립당격효과적영향，분별대당격거리위1、2、3、4 mm 화출구관경위0．5、1．0 mm 저궤충불동공황하적반응기내적류장진행료연구。수선채용 ANSYS 대불동적류체모형진행전처리，연후이용 Fluent 대반응기진행모의우화분석。모의인위：재상동적고압하，당당격거리위2 mm，출구관경위0．5 mm 시，반응기내적당격속도가체도최대，대과립적분쇄효과최가，채용사분취대치식미형당격류반응기제비적미유액90％이상적과립직경도재1．701μm 이하，이기본체도미미급과립적제비요구。
Impinging distances and outlet diameters are two key dimensions of impinging reactor.In order to investigate how im-pinging distances and outlet diameters influence the particle impacting,the flow field was researched under different working con-ditions by setting the impinging distances set as 1,2,3,4 mm and the outlet diameters set as 0.5,1 mm respectively.Different flow models were firstly pre-processed by ANSYS software.Then Fluent software was applied to simulate and analyze the flow field of different reactors.The simulation results showed that the reactor with an impinging distance of 2 mm and an outlet diame-ter of 0.5 mm produces the maximal impinging velocity and best impacting effect.90% particles of the emulsion prepared by using the four opposed nozzles micro impinging reactor are with a diameter smaller than 1.701 μm,which has basically satisfied the preparation requirement of micron particles.