An Analysis on the Velocity Field of Decanter Centrifuge on the Basis of Fluent | |
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( Volume 2 Issue 3,March 2016 ) OPEN ACCESS | |
Author(s): | |
Qiyun Cheng, Hongbin Liu, Yuxin Tian | |
Abstract: | |
Because of the complex internal structure and the high-speed operation inside, the real-time monitoring of decanter centrifuge’s internal flow field is impossible. The natures of internal flow field directly effects the production capability, separation and operating life of centrifuge. The paper is finished upon the basis of high-speed decanter centrifuge LW355-1235. We use Fluent, the large-scale commercial fluid computation software, to obtain the distribution of velocity field by simulating the internal flow field with the use of RNG turbulence model under different circumstances. The whole process is carried out with existence of revolving speed discrepancy. The result shows that every velocity component of fluid is getting bigger when we increase the revolving speed of drum. Besides, the gap between the simulation value and theoretical value is getting wider, and the axial velocity turns to be slower. For fluid phases with different concentrations, the declining rates of axial velocity are tend to be the same. Besides, the separation is getting worse when the speed discrepancy gets smaller. It also provides basis for the further analysis of high-speed decanter centrifuge. |
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