方形分离器结构优化试验研究

在冷态试验台上对特征尺寸D=300 mm的入口带加速段的方形分离器进行结构优化研究。结果表明:分离效率随着芯筒直径(d)、芯筒插入深度(s)的增大均呈先增大后减小的趋势;入口高宽比(a/b)与直段高度(h)对分离效率的影响存在交互作用;随着a/b的增大,分离效率先增大后减小;不同入口高宽比时,分离效率随直段高度的变化趋势不同,当a/b>5.92时,随着直段高度的增大,分离效率先减小后增大,在h/D=2.3时最低;当a/b<5.92时,分离效率随着直段高度的增大而减小;分离器阻力随着入口高宽比的增大而增大,随着直段高度的增大而减小。4个参数的最优值分别为:d=0.4D、s=0.6D、a/b=8和h=1.8D,此时对应的分离器阻力为1.22 kPa。

An Experimental Study of the Structural Optimization of Square Shaped Cyclone Separators

On a cold-state test rig,a structural optimization study has been conducted of a square shaped cyclone separator having an inlet of characteristic dimension D=300 mm with an acceleration section.The study results show that with an increase in core tube diameter(d) and core tube inserting depth(s),the separation efficiency tends to go up at the beginning followed by a decrease.The inlet height-width ratio(a/b) and straight section height(h) have an interactive impact on the separation efficiency.With an increase in inlet height-width ratio a/b,the separation efficiency goes up first and then decrease.When the inlet height-width ratio undergoes a change,the separation efficiency tends to change differently with a change in straight section height.When a/b is above 5.92,the separation efficiency will go down first with an increase in straight section height and then rise,attaining a minimum value at h/D=2.3.When a/b is below 5.92,the above efficiency will decrease with an increase in straight section height.The resistance of the cyclone separator will increase with an increase in the inlet height-width ratio and decrease with an increase in straight section height. The optimized values of the four parameters can be given as follows respectively:d=0.4D,s=0.6D,a/b=8 and h=1.8D.In such a case,the corresponding resistance of the cyclone separator will be 1.22 kPa.