导叶式旋风管排气管内流动减阻的试验研究

Experimental study on flow drag reduction of vortex finder in guide vane cyclone tube

通过对导叶式旋风管内流动参数的测量分析,发现排气管内气流旋转强度高,并存在'滞流'、'倒流'及逆压梯度等无益于颗粒分离的流动状态,造成排气管内压力损失约占旋风管总压降的22%。在排气管内安装框形结构后,可有效削弱和抑制上述耗能流动,在保证分离效率基本不变的前提下,使旋风管减阻幅度达到9%。

The flow field in the guide vane cyclone tube was measured and analyzed in detail by using the five-hole probe. The results show that the highly rotating flow, reverse flow and contrary gradation of the static pressure in the vortex finder contributed to pressure loss as high as 22% of total pressure drop in the cyclone tube. The part of energy consumption in vortex finder was no use to the particles＇ separation and should be reduced. When a columniform frame was inserted in the vortex finder, the flow and pressure distribution which leads to energy loss was weakened and damped effectively. So the total pressure drop of the cyclone tube was reduced by about 9% at the same separation efficiency.