Premises for the mathematical modeling of the combined corona-electrostatic field of roll-type separators

An Equivalent Electrode System for Efficient Charging of Filtration Media

“…As the non-ionizing cylinder gets closer to the ionized wire, the corona onset voltage increases results in a lower charge emission [8][9], [19]. Figure 7(a) shows the influence of changing the inter-electrode distance (d) on the shape of the electrostatic field on the ground surface.…”

“…If E on is the electric field at onset computed by peek's formula then the corresponding corona onset voltage V o is computed using V o =V (E on / E), where V is the voltage which produce an electric field of magnitude E at the surface of the wire and computed using the GA-CSM algorithm [8,18]. The distance between the ionized wire and the upper cylinder, h, is kept constant as well as the height of the ionized wire above the ground plate, d. The measured and calculated values of the corona onset voltage for different ionized wire diameters of the ionized wire at different positions of the limiting cylinder along the x-axis at distance 25mm from the ground plate, y=25mm, as well as in the absence of the auxiliary cylinder (dual electrode system) are illustrated in Figure 10.…”

“…The dual electrode system is the most commonly configuration applied in electrostatic charging of dielectric media despite being encountered to mechanical damage [8,9]. The dual electrode system, figure 1a, is a system comprising an ionizing wire and a nonionizing metallic cylinder electrode, all at the same potential.…”

“…The dual electrode system, figure 1a, is a system comprising an ionizing wire and a nonionizing metallic cylinder electrode, all at the same potential. The cylinder serves as a metallic support for the ionizing wire as well as its effect on the onset voltage of the wire and corona discharges [8].…”

Electric and electronic equipment of a research-oriented electrostatic separator

“…The numerical field analysis [26] offers solutions for the electrostatic field (Fig. 6), but for the spatial charge generated by the corona effect the computation is possible only in particular configurations [27][28][29].…”