抄録
Recently acid rain has turned into a grave environmental problems. The authors made out artificial acid rain with any electric conductivity σ and value of pH, by a combination of adilute sulfuric acid and seven kinds of salts based on chemical analysis of ionic ingredient of rainwater. In this paper, apropagation of a streamer discharge on the surface of artificial acid rain is investigated in detail by using a high-speed Schlieren method and a current measuring system by LED.
The results obtained may be summarized as follows:
(1) A flashover voltage Vf of rainwater decreases gradually with increasing the σ and an effect of the Vf on the pH can not be seen obviously in this experimental conditions.
(2) On the propagation of the streamer discharge on the surface of artificial acid rain,
(i) in case of rain which has about the same pH and the different σ, the propagation length ldof streamer-like density changes becomes larger as the σ is made larger.
(ii) in case of rain which has about the same σ and the different pH, a remarkable difference can not be seen in a propagation figure and a t-ld characteristic of the streamer-like density changes, and in a current waveform.
