立体旋流筛板空间气相流场的CFD模拟

发布时间：2018-09-08 08:50

【摘要】：应用STAR-CCM+软件,采用Realizable k-ε模型,对立体旋流筛板空间气相流场特性进行了数值模拟研究。结果表明:立体旋流筛板空间主要存在贴近筛板壁面的穿孔流动与两筛板间的旋流流动2种方式,气体经立体旋流筛板的流动过程分起旋阶段与旋流发展阶段。在贴近筛板壁面的区域,由内筒外壁至外筒内壁方向,穿孔流动速度在各流动阶段均呈增加的趋势;在两筛板间区域,起旋阶段,由内筒外壁至外筒内壁方向旋流流动速度值变化较小,沿旋流方向靠近下一块筛板区域的速度值较大;旋流发展阶段,由内筒外壁至外筒内壁方向旋流流动速度值呈先降低再增加的趋势,沿旋流方向靠近上一块筛板区域的速度值较大。在轴向不同高度区域,贴近筛板壁面的穿孔速度为中部最大、上部次之、下部最小;两筛板间的旋流流动速度为上部较小,中、下部较大。各区域速度值随着气相动能因子的增加而增加。
[Abstract]:Using STAR-CCM software and Realizable k- 蔚 model, the characteristics of gas flow field in three-dimensional swirl sieve plate are numerically simulated. The results show that there are two main ways in the three-dimensional swirl sieve plate space: perforated flow close to the wall of the sieve plate and swirling flow between the two sieve plates. The gas flow through the three-dimensional swirl sieve plate is divided into two stages: the starting stage and the developing stage. In the region close to the wall of the sieve plate, the velocity of perforated flow increases in each flow stage from the outer wall of the inner cylinder to the inner wall of the outer cylinder; in the region between the two sieve plates, the velocity of the perforation increases, and in the region between the two sieve plates, the velocity of perforation increases. The velocity value of swirl flow in the direction from the inner wall to the inner wall of the inner cylinder is small, and the velocity value near the next sieve plate is larger along the swirl direction. The velocity value of swirl flow in the direction from the inner wall to the inner wall of the inner cylinder decreases first and then increases, and the velocity value near the last sieve plate is larger along the swirl direction. In different axial height regions, the perforation velocity close to the wall of the sieve plate is the largest in the middle, followed by the upper part and the lowest in the lower part, and the swirl velocity between the two sieve plates is smaller in the upper part, larger in the middle and lower in the lower part. The velocity values of each region increase with the increase of gas kinetic energy factor.
【作者单位】：河北工业大学化工学院;河北工业大学海水资源高效利用化工技术教育部工程研究中心;
【基金】：河北省科技计划项目(14273105D) 河北省自然科学基金资助项目(D2014202074)
【分类号】：TQ053.5

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