Abstract
The insulators and the pantograph on the roof of the high speed train are always running in the open air. The pollution particles in the air can easily deposit on the surface of the roof of the high speed train. Contaminative flashover may be incurred by the polluted surface of insulators. Researches on insulator pollution characteristics make us take measures to effectively reduce the occurrence of flashover. The contamination deposition characteristics of the insulators on the roof of the high speed train were researched in this paper. CFD technology is taken to numerically analyze the compressible turbulent flow field around the insulators and the pantograph on the roof of the train. A multiphase model is taken to simulate the deposition of the pollution particles. An interaction model between the air and the particles had been involved in the simulation. By taken the pollution volume fraction of insulator surface as the index of pollution measure, three designs of the train roof were assessed. The velocity contours and aerodynamic drag of the three designs were also analyzed to estimate the aerodynamic performance. It has been found that the side panel design increases the wind velocity in the roof area and reduces the contamination level of the insulators.
