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Rotating vortex core boundary distribution behavior in cylindrical cyclone separator
CHEN Jian-lei1, HE Li-min1, LUO Xiao-ming1, L Yu-ling1, HAN Meng-yuan2, YANG Dong-hai1
(1.College of Pipeline & Civil Engineering in China University of Petroleum, Qingdao 266580, China;2.Shengli Engineering & Consulting Company Limited, Dongying 257026, China)
Abstract:
Differential Reynolds stress model was used to simulate rotating vortex core boundary of gas phase flow field in cylindrical cyclone separator. The attenuation form of vortex core was expounded and the effects of vortex finder diameters, inlet areas and separator lengths on the distribution of rotating vortex core boundary were studied. The results show that zero axial velocity boundary and rotating vortex core boundary are different, which locate on both sides of vortex finder projection surface respectively. The natural termination form of rotating vortex core in separator is that vortex core end stops deviously on the wall of separator and makes circular motion along the wall. Vortex core boundary width decreases with the decrease of vortex finder diameters and the increase of inlet areas. Vortex core boundary in separator with small length presents columnar distribution approximatively among the larger span of vortex finder diameters distribution. The increase of separator length can make tangential velocity attenuate, and vortex core boundary expands outwards at vortex finder inlet and shrinks downwardly along the axial direction.
Key words:  cyclone separator  tangential velocity  zero axial velocity envelope  vortex core  numerical simulation