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Mixing Performance of Sewage Treatment Mixer at Different Rotational Speed

[+] Author Affiliations
Tian Fei, Wei-dong Shi, Bin Chen, Wei-dong Cao

Jiangsu University, Jiangsu, China

Paper No. IMECE2011-62631, pp. 825-830; 6 pages
doi:10.1115/IMECE2011-62631
From:
  • ASME 2011 International Mechanical Engineering Congress and Exposition
  • Volume 6: Fluids and Thermal Systems; Advances for Process Industries, Parts A and B
  • Denver, Colorado, USA, November 11–17, 2011
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5492-1
  • Copyright © 2011 by ASME

abstract

To investigate the mixing performance of submersible mixer, fluid in the pool mixed by sewage treatment mixer under three different rotational speeds were simulated using Fluent 6.3. Unstructured tetrahedron grid, MRF technology, RNG k–ε turbulence model and SIMPLE algorithm were adopted in the simulation. The velocity distributions on each section were analyzed, and the effective axial propelled distance and disturbance radius of water section of the sewage treatment mixer were studied. Using CFD, the optimum rotational speed of the mixer can be determined based on criteria for the velocity field in the pool. The way it is formulated now suggests that 740 r/min is the optimum speed. It will provide a reference for practical engineering applications of sewage treatment mixer.

Copyright © 2011 by ASME

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