| Abstrakt: |
Based on a comparison of the temperatures of electron collision with and without an insulation surface in air under an electric field, the insulation surface effect on the air discharge and the inception voltage of a continuous arc along the surface were investigated. Based on the body force of streamer and the Maxwell boundary condition, the physical characteristics of streamer radius, length, and velocity that varied with the streamer current, as well as the temperature at the arc head, were calculated. The increment velocity of temperature with an insulation surface is 100 times faster than that in the air gap, which is in favor of streamer propagation. With the increment of current and temperature, the radius, and length of the streamer all increase at different degrees. In addition, the streamer velocity along the surface is 10 times faster than that in the air gap between two parallel plate electrodes, which is at the order of 106 m/s. [ABSTRACT FROM AUTHOR] |
