The Fluent software was applied to analyze the effect of the inlet form of helical blade on the separating performance and pressure property of dehydrated hydrocyclone. The outlet angle and cycles of the blade as well as the number of blades were optimized. A comparative analysis shows that reduction of the outlet angle of the blade within a certain scope is favorable to the formation of oil core at the overflow port and to the improvement of oil-water separation efficiency. But the chances of oil droplet breaking will increase if the outlet angle of the blade is too small. As a result the separating efficiency will decrease and the pressure loss will increase accordingly. Increase of the cycles of the blade can produce some coalescence for inlet oil droplets. But too many cycles will reduce the effect of coalescence and the pressure loss will increase accordingly. Increase of the number of blades can make fluids distribute more evenly, effectively reduce the effect of turbulence within the flow field and improve the separating efficiency.%应用Fluent软件,计算分析了螺旋叶片入口型式对脱水型水力旋流器的分离性能和压力特性的影响.对螺旋叶片的出口角度、圈数以及叶片数量进行优选.通过对比分析发现,在一定范围内减小螺旋叶片出口角度有利于溢流口处油核的形成,提高油水分离效率,但螺旋叶片出口角度过小会增加油滴破碎的机会,反而会降低分离效率,压力损失也相应增大；增加螺旋叶片圈数对入口油滴有一定的聚结作用,但圈数过多聚结作用会减弱,压力损失也相应增大；增加叶片数量可以使流体分布更加均匀,有效减小流场内的紊流作用,提高分离效率.
展开▼
