Research on Mechanism of Fluid Flow Characteristics in a Stirred Tank with Stirrer Composed of Perturbed Six-Bent-Bladed Turbine

Abstract:

The power consumption and pressure distribution of Newtonian fluid and pseudoplastic fluid in a stirred tank with stirrer composed of perturbed six-bent-bladed turbine (6PBT) were calculated by CFD combined with laminar viscosity model. The test liquid used were glycerine and 1.25% (wt) xanthan gum solution, a pseudoplastic fluid with a yield stress. Compared with the stirrer composed of six-bent-bladed turbine (6BT), the effects of the 6PBT impeller on fluid pressure distribution were extensively analyzed, and the Coriolis force role of strengthening swirling motion and efficient agitation mechanism of 6PBT impeller were made a thorough inquiry, respectively. Results show that 6PBT impeller can lead to an energy saving effect as the increasing speed, and generate a larger low pressure region in flow field at the same time, so this is more beneficial to the whole circulation. Moreover, the stronger swirling motion may emerge in stirred tank with 6PBT impeller under the action of Coriolis force, which is exceedingly advantageous to promotion of mixing efficiency. As a result, 6PBT impeller is found to have a obvious superiority on mixing process of pseudoplastic fluid. The research results provide valuable references and instructions for the development of new type impeller.

• Periodical: Applied Mechanics and Materials (Volumes 543-547)
• Pages: 85-89
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.543-547.85
• Online since: March 2014
• Authors: De Yu Luan*, Shen Jie Zhou, Hu Duan
• Keywords: Agitation Mechanism, Coriolis Force, Power Consumption, Stirrer Composed of Perturbed Six-Bent-Bladed Turbine

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