%0 Journal Article
%A WANG Si-ying
%A LIU Xiang-bei
%A CHEN Duan
%T Formation of Atomization Source Caused by Flood Discharge Flow Nappe
%D 2015
%R 10.3969/j.issn.1001-5485.2015.02.012
%J Journal of Yangtze River Scientific Research Institute
%P 53-57
%V 32
%N 2
%X The heavy rainfall and mist flow induced by flood discharge atomization of high dam projects may have negative effect on the hydropower project and its surrounding environment. Researchers have done much work on its influence region and rainfall intensity distribution on the downstream banks. Because of the complexity of this phenomenon, the formation  mechanism of the  flood discharge atomization is still not well revealed. Using high speed video technique in simplified hydraulic model tests, we observed the formation process of flood discharge atomization when a deflecting flow nappe drops into the downstream pool in different hydraulic conditions. We especially focused on the movement of the flow nappe and surface water around the drop area, and then analysed the components of different sources and their features. We obtain that  the flood discharge atomization source could be divided into two types: dropping  caused by the instability and aeration of   nappe, and  splashing caused by the collision  between   nappe and    downstream water. Specially, the formation of the splashing atomization source is  closely related with the periodical formation and dissipation of    water surface bulges in the nappe drop area.
%U http://ckyyb.crsri.cn/EN/10.3969/j.issn.1001-5485.2015.02.012