Vol. 11, No.1, pp.64-68 (2017)
Numerical Analysis of Ionic Wind Induced EHD Turbulence Flow Inside ESP
Z. Y. Ning1, J. W. Chen2, and K. Yan1
1Industrial Ecology and Environment Research Institute, Zhejiang University, China
2Department of Public Health, Centers of Disease Control of Yuxi, China
Abstract
Electrostatic Participator (ESP) was used as an industrial dust removal equipment for over a century. Currently, most common efficiency estimate method is Deutsch's equation, which consider particle removal efficiency is majorly related to specific collection area. However, a number of experimental results shown that the flow pattern inside ESP are also have a huge influence on collection efficiency. In order to visualize the flow pattern inside ESP, Numerical analysis method was applied. This also provided a better understanding about the Electro Hydrodynamic (EHD) turbulence flow and its impact on collecting efficiency. A simple wire-plate ESP model was being built and Finite Element Method (FEM) algorithm was applied to simulating flow pattern inside ESP, other physical elements and their coupling effects on particle trajectory were also considered, such as electric field, turbulence and gravity. The particle evaluation results shown that the major force applied on particles is electric force, followed by drag force. under the stationary wall condition, the difference can reach 1-2 orders of magnitude. However, by extra 3-D flow tendency created by moving wall function, drag force gradually equaled to electric force.
Keywords - Numerical analysis, electro hydrodynamic flow, Multiphysics, particle evaluation