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采用粒子图像测速仪(PIV)试验研究了喷嘴套吹积炭孔面积对双级旋流器出口流场的影响.试验结果表明:随着吹积炭孔面积与双级旋流器开孔面积之比由0增大到0.24,回流速度下降,进入双级旋流器内部的回流气量减小.当吹积炭孔面积与双级旋流器开孔面积之比大于等于0.18,吹积炭气流会扰乱双级旋流器出口附近流场,破坏双级旋流器出口对称的双涡结构,吹积炭气流对双级旋流器出口流场的影响范围为X/D=0~0.8.
The effect of the area of the charcoal hole blown by the nozzle sleeve on the outlet flow field of the two-stage cyclone was studied by the particle image velocimetry (PIV) test.The experimental results show that with the increase of the area of the charcoal blown hole and the opening area of the double- Ratio increased from 0 to 0.24, the reflux rate decreased, into the two-stage cyclone internal recirculation gas volume decreases when the charcoal pore area and dual-stage cyclone opening area ratio greater than or equal to 0.18, charcoal The airflow will disrupt the flow field near the outlet of the two-stage cyclone and destroy the symmetrical twin-vortex structure at the outlet of the two-stage cyclone. The influence of the blow-by carbon flow on the exit flow field of the two-stage cyclone is X / D = 0-0.8 .