Three dimensional simulating and experimental study on the influential factors of the effectiveness of the DC-GIL particle trap

In this paper, the motion behavior has been analyzed and the effect of particle trap's shape and size on the capture efficiency of particulate traps in DC GIL has been studied. This paper constructs a scale model the actual coaxial cylindrical GIL transmission unit and particle trap, and with the particles charging process in the electric field taken into consideration, the COMSOL multi physics simulation software is used for 3D simulation of the internal electric field with GIL particulate trap conditions. And then considering the forcing situation of micro particles in the field, the dynamic simulating calculation of the influence of trap thickness, shield area and other factors on escaping probability and particle-capturing efficiency has been taken using control variables method. At the same time, a cylindrical GIL scaled experimental platform is built to take experiments on typical case simulation, to discover the capturing probability of different traps. Research shows that different groove thickness and width of particle trap lead to the difference of capture efficiency of traps, and a ratio of the thickness to width, k was defined, the particle size is smaller, and the linear correlation between the probabilities of k was stronger. And the particle size is larger, the slot width as the influence factors of trap capture probability also increases, capture probability shows a trend that increased first and then decreased with the increase of k value.