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純水の高速噴出時における帯電霧の発生 Generation of Charged Fog by High-speed Ejection of Pure Water 浅野, 一明 Asano, Kazuaki 下川, 博文 Shimokawa, Hirofumi Water-jet technology Aerosol particle Charged fog Lenard effect Streaming electrification application/pdf It is well known that manyc harged particles are generated by the disruption of liquid.Th is phenomenon is called the Lenard effect. One of the authors clarified that the negatively charged fog is generated around山ejet when tile water is ejected from an ou.le at the laminar flow (m邸 .3.2m/s).T he purpose of tllis report is to investigate the generation of the charged fog by lligh-speed ejection of pure water at turbulent flow. The maximum ejected velocity is 52.5m/s. Experimental results show tllat positively charged fog is generated from ap ositively charged jet,th erefore the charged fog polarity agrees with the polarity of the jet. The generation current of the charged fog or the streaming current depends on山e ejected velocity v, of v" (n=3.5). Negatively charged fog is also generated simultaneously, and its particle size is sm叫erthan a positively charged particle size. Further, the amount of cl皿gedfog depends on not only the ejected velocity but also resistivity of the sample water. The generation current on ejection increases with resistivity of the water.It is considered that the factor dominating the amount and the polarity of charged fog at the turbulent flow is streaming electrification of jet rather than tl記 Lenard effect. 神奈川工科大学 1998-03-20 jpn departmental bulletin paper VoR https://doi.org/10.34411/00000822 http://hdl.handle.net/10368/827 https://kait.repo.nii.ac.jp/records/829 10.34411/00000822 AN10074179 09161902 神奈川工科大学研究報告.B,理工学編 22 45 51 https://kait.repo.nii.ac.jp/record/829/files/kkb-022-008.pdf application/pdf 2.9 MB 2010-02-03