0

Full Content is available to subscribers

Subscribe/Learn More  >

Effects of Vacuum Enhancer on the Flow Fields in a Quick Injection Agitator

[+] Author Affiliations
K.-J. Youn, Youn J. Kim

Sungkyunkwan University, Suwon, Korea

B.-J. Ahn

Hyundai Mobis, Yongin, Korea

Paper No. HT-FED2004-56860, pp. 915-920; 6 pages
doi:10.1115/HT-FED2004-56860
From:
  • ASME 2004 Heat Transfer/Fluids Engineering Summer Conference
  • Volume 4
  • Charlotte, North Carolina, USA, July 11–15, 2004
  • Conference Sponsors: Heat Transfer Division and Fluids Engineering Division
  • ISBN: 0-7918-4693-8 | eISBN: 0-7918-3740-8
  • Copyright © 2004 by ASME

abstract

An agitator is generally used in the chemical and food industries, and water treatment plants. The water treatment processes are to be classified into rapid mixing, coagulation, precipitation, filtration and sterilization. Rapid mixing process is the smallest scale and its dispersion time is short. It is a very important process because it gives significant effects on the following processes. A quick injection agitator is used to mix water and many kinds of chemicals. A quick injection agitator has superior mixing characteristics that represent a major step forward in the water treatment. It consists of a motor driven open propeller, which creates a vacuum in the chamber directly above the propeller. This vacuum is transmitted to the chemical metering/control systems by a vacuum line similar to current remote injection systems. The most important design parameters are velocity gradient and dispersion time in a quick injection agitator. Velocity gradient is changed by the shape of the propeller and vacuum in a space between the propeller and the vacuum enhancer. In this study, numerical analyses are carried out to investigate the characteristic of flow in a quick injection agitator with various gaps between the propeller and the vacuum enhancer. A commercial CFD code is used to compute the 3-D viscous flow fields within the propeller of the agitator. Numerical results are graphically depicted with different velocity gradients. Special attention is paid to following topics: pressure distribution, velocity gradient, and void fraction.

Copyright © 2004 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In