CAJ | 학술논문

为研究供料口位置对离心机供料射流流场的影响，采用直接模拟蒙特卡罗（DSMC）方法对离心机中心射流区域进行模拟。选择Iguassu离心机模型和变径硬球碰撞模型，得到了不同的轴向和径向供料位置下径向供料模型的供料射流流场参数分布情况。通过对模拟结果进行分析可得：在径向供料条件下，供料口附近区域的流场受供料条件的影响显著。由于供料射流的膨胀作用，导致了供料口附近低温区的出现。在靠近出流边界处，由于较高的角向速度，形成较大的压力梯度，使气体的径向速度降低，导致温度明显升高。轴向位置的变化导致流体参数的轴向平移。而随着供料口径向位置的增大，供料口附近的膨胀范围减小，低温区减弱，即该区域的最低温度升高。而近出流边界处，随供料口径向位置的增大，温度相应降低，径向速度同时降低。
위연구공료구위치대리심궤공료사류류장적영향，채용직접모의몽특잡라（DSMC）방법대리심궤중심사류구역진행모의。선택Iguassu리심궤모형화변경경구팽당모형，득도료불동적축향화경향공료위치하경향공료모형적공료사류류장삼수분포정황。통과대모의결과진행분석가득：재경향공료조건하，공료구부근구역적류장수공료조건적영향현저。유우공료사류적팽창작용，도치료공료구부근저온구적출현。재고근출류변계처，유우교고적각향속도，형성교대적압력제도，사기체적경향속도강저，도치온도명현승고。축향위치적변화도치류체삼수적축향평이。이수착공료구경향위치적증대，공료구부근적팽창범위감소，저온구감약，즉해구역적최저온도승고。이근출류변계처，수공료구경향위치적증대，온도상응강저，경향속도동시강저。
In order to study the influence of feed position on the counter-current in gas centrifuge ,direct simulation Monte-Carlo (DSMC) method was chosen to simulation the rarefied region of gas centrifuge .By setting Iguassu centrifuge model and variable hard sphere (VHS) model ,the flow distributions of different feed positions were acquired . The analysis of the calculation results notes the following flow phenomena :In case of radial feed ,the region near the feed outlet is largely influenced by the feed condition . The expansion of jet results in the hypothermic region .Near the boundary of effluent , due to the fast peripheral velocity ,pressure gradient is large ,w hich results in the slow radial velocity and the high temperature .The axial translation of the jet results in the axial translation of the flow distributions .With the increase of the radius of feed ,the region of expansion near the feed reduces and the lowest temperature of the hypothermic region rises .Near the boundary of effluent ,with the increase of the radius of feed ,the temperature and the radial velocity fall .