The Numerical Simulation of An Unsteady-Flow Particleeparator With Triple Outlet Channel
|Keywords:||粒子分離器;週期性振盪流場;三岔型流道;particle separator;periodic oscillating flow;triple outlet channel||Issue Date:||2008||Abstract:||
This study mainly simulates two dimensional behavior of an unsteady-flow particle separator with triple outlet channels. The geometry of this device was referred to the previous study. During the analysis, we regard the flow field as the combination of laminar flow and periodic oscillating flow. The analytic models, in principle, are divided by two components, which are the main channel and trifurcate zone. When the inlet is subjected to the oscillating velocity profile, there will be two vortices which are generated upstream of the center channel. The vortices will increase the flow resistance of the center channel, and rotating directions of the vortices are able to lead the particles to move toward the side channels. First of all, the flow phenomenon of the particle separator was observed at 1/16 step in the whole period. Secondly, the flow fields of the particle separator were investigated in various parameters, such as the flow velocity, oscillating frequency, the incline angle between the two side channels and the length of the center channel. Base on the results of this simulation, two important separating factors of this device were obtained. The dimensionless factor of the flow field, Ka, should be above 5.72, and the length of the center channel should be shorter than the side channel.
|Appears in Collections:||應用力學研究所|
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