关键词: 沙尘暴, 导线电位差, 风洞模拟

Abstract: Wind tunnel simulation of the effect of sandstorm on the voltage of aerial electrical wire showed that(1) blowing sands exhibit an obvious electrification phenomenon while impacting aerial electrical wire during sandstorm phase, thereby the aerial wire gains a certain potential and its voltage increases exponentially with the increasing of wind velocity and sand transport rate;(2) with the increase of sand particle size, the height of the potential value occurring will be raised;(3) the bigger the particle size, the smaller the electric potential;(4) the potential value of aerial wire during sandstorm experiment is obviously greater than that during blowing sand experiment;(4) the potential value of aerial wire is positively correlated to sand moisture content, but there exists a limit;(5) the potential value of aerial wire is negatively correlated to aerial diameter in the same material condition, and in the same diameter the aluminum wire could generate larger potential value than copper aerial. The simulating experiment also demonstrated that the blowing sand could trigger electric discharge processes when applied a 2~4 kV high voltage to bare aluminum wire ends.

Key words: sandstorm, potential of aerial wire, wind tunnel simulation