Simulation of Contamination Deposition on Typical Shed Porcelain Insulators

The flow field near the insulator is more complex, and when the air flows through the insulator, the flow line is more likely to bend larger. [...]in order to make the simulation results closer to the actual situation, the flow field is time-averaged. [...]compared with the electrical force, the three forces were relatively small and can be negligible, and when the charged particles continue to move close to the insulator during the movement process, the electrical force gradually increased, so the impact of electrical force cannot be ignored [21,22]. [...]under the condition of satisfying the calculation accuracy, especially in order to reduce the amount of calculation, assume that in the flow and electric fields, we mainly consider the influence of the gravitational force (Fg), fluid drag force (Fd), and the electrical force (Fe) of the contaminant particles. When the speed increases to a certain speed, the electric force is smaller than the drag force, even can be ignored. [...]when the wind speed is larger, the particles collide and deposit on the insulator surface mainly owing to the coupling effect of the drag force and gravity force at a same particle size. [...]the increase in particle size also makes the corresponding increase in the gravity of particles. [...]at the same wind speed, as the particle size increases, the increase in electric field force and gravity enhance the deposition of pollution particles.