Numerical simulation of flow velocity distribution in cyclone with impulse electrostatic excitation

Abstract

A single-phase of gas, three-dimensional turbulent flow velocity distribution model – k– ɛ model, which considers the effects of impulse high-voltage electrostatic fields, was founded. The k– ɛ model was dispersed by control-volume method and solved by Semi-Implicit Method for Pressure Linked Equations (SIMPLE) algorithm. The axial-, the tangential-, and the radial-velocity distributions of flow field inside cyclone with impulse electrostatic excitation on the various operating parameters were obtained by computer numerical simulation, and verified partly by experiment. It was concluded that shape of curves of velocity distributions of flow field inside cyclone impulse electrostatic precipitation (CIESP) was similar to that of cyclone with no impulse electrostatic field while the values of the axial-, the tangential-, and the radial-velocity of airflow had distinctly changed in impulse electrostatic field, in particular, the radial-velocity of airflow. Compared to cyclone with no impulse electrostatic field, the radial-velocity of airflow in CIESP was influenced strongly by the electric field at same inlet gas rate.