%0 Journal Article
%T Drag Reduction Effect of Dimple Concave Surface in Air<br>凹坑形表面在空气介质中的减阻性能研究
%A XU Zhong
%A XU Yu
%A WANG Lei
%A XU Wen-ji
%A <br>徐中
%A 徐宇
%A 王磊
%A 徐文骥
%J 摩擦学学报
%D 2009
%I 
%X The flow of a new unsmooth surface-dimple concave surface in air was simulated numerically and the drag reduction coefficients of both unsmooth surface and smooth surface with hemisphere of 0.4mm dius were presented. The result showed that this kind of unsmooth surface had a good drag reduction effect for flow velocity ranging from 4m/s to 48m/s. And it had the best reducing ability (7.2%)at a velocity of 24m/s. The theory of the drag reduction was finally analyzed.
%K dimple concave
%K unsmooth surface
%K drag reduction
%K numerical simulation
%K boundary layer<br>凹坑形沟槽
%K 非光滑表面
%K 减阻
%K 数值模拟
%K 边界层
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=5D344E2AD54D14F8&jid=2F467A5C6371C830162AAA01D7DAD07A&aid=CC15AF883BD8CF41E17FF6A7D71E6A05&yid=DE12191FBD62783C&vid=771469D9D58C34FF&iid=B31275AF3241DB2D&sid=57EA20F731155703&eid=7882A2973AA04DE8&journal_id=1004-0595&journal_name=摩擦学学报&referenced_num=1&reference_num=0