摘要
在自制的多功能多相流试验台上对下排气下出料式方形分离器进行了试验研究,结果表明该分离器在正常运行条件下具有较高的分离性能。在对其内部三维流场的分布情况进行了详细分析,以及与圆形分离器对比的基础上得出方形分离器内部造成颗粒与气流分离的机理与圆形分离器基本上一致,均为离心力的作用产生分离效果,但方形分离器在拐角处的分离效果更强,而且方形分离器内部切向速度不再分为涡核区和势流旋转区,径向与轴向速度的规律则仍与下排气圆形分离器大体相同。其分离效果受风速和入口颗粒浓度的影响均存在着一临界值,低于该临界值分离效果随风速和浓度的增加而急剧上升,大于此临界值后则有缓慢下降趋势。
Detailed experiments were carried out to study of the behavior of square cyclone. Square cyclone is similar with traditional cyclone in separation behavior, in which centrifugal force appears the most important. However, square cyclone has better separation effect also at turning corners. Square cyclone has the same distribution in radial and axial velocity with cyclone, but there is no division into whorl core field and potential flow rotation field for tangential velocity. A critical value exists for the effect of air velocity and solid concentration on separation efficiency individually. Separation efficiency increases sharply with air velocity and solid concentration when below the critical value, while decreases when beyond the critical value.
出处
《电站系统工程》
北大核心
2003年第3期12-14,共3页
Power System Engineering