Wind tunnel simulation experiment and investigation on the electrification of sandstorms  

作　　者：QU Jianjun YAN Muhong DONG Guangrong ZHANG Hongfa ZU Ruiping TUO Wanquan ZHAO Aiguo XIAO Zhenghua LI Fang YANG Bao 

机构地区：[1]Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute and Shapotou Desert Research and Experiment Station, Chinese Academy of Sciences, Lanzhou 730000, China

出　　处：《Science China Earth Sciences》2004年第6期529-539,共11页中国科学(地球科学英文版)

基　　金：This project was supported by the InnovationProject of the Chinese Academy of Sciences (Grant No. 210027); the Knowledge Innovation Project of Chinese Academy of Sciences (GrantNo. KZCX2-304);the National Natural Science Foundation of China(Grant No.39971013); the State Key Basic Research Development Planning (Grnat No.20000487).

摘　　要：Electric discharge phenomenon is often observed during the passage of sandstorms over desert regions and sometimes does great damage to human beings. Based on previous researches on the electrification of sandstorms by the scholars both at home and aboard,the authors conducted the simulation experiments on the electric fields of sandstorm-triggered creeping-saltating sand, suspending sand and watered suspending sand in the large-scale wind tunnel. According to the experimental results the electric field structure and its formation mechanism were analysed and discussed, the quantity of electric charges and electric field strengthwere measured and calculated, and finally several conclusions were drawn.Electric discharge phenomenon is often observed during the passage of sandstorms over desert regions and sometimes does great damage to human beings. Based on previous researches on the electrification of sandstorms by the scholars both at home and aboard, the authors conducted the simulation experiments on the electric fields of sandstorm-triggered creeping-saltating sand, suspending sand and watered suspending sand in the large-scale wind tunnel. According to the experimental results the electric field structure and its formation mecha-nism were analysed and discussed, the quantity of electric charges and electric field strength were measured and calculated, and finally several conclusions were drawn.

关 键 词：sand drift structure electrification mechanism wind tunnel simulation 

分 类 号：N[自然科学总论]