%0 Journal Article
%T Experimental Study of Flow Control in Juncture Region by Using a Small Interfering Cylinder<br>应用小干扰柱体控制角区马蹄涡结构的实验研究
%A ZHANG Hua
%A Muhammad Yamin Younis
%A HU Bo
%A LIU Yao-long
%A <br>张华
%A 穆罕默德·亚民·尤尼斯
%A 胡波
%A 刘尧龙
%J 实验力学
%D 2011
%I 
%X A simple and passive method for restraining and controlling horseshoe vortex in the juncture region is proposed in this paper. Namely, arranging an interfering cylinder, the size of which is much smaller than that of main cylinder and the cross section of which can be any circular, square and triangular, at upstream location of the main circular cylinder mounted on a flat plate, then the horseshoe vortex appeared in juncture region may be restrained and controlled due to the weak horseshoe vortex produced by the interfering cylinder. The purpose is to turn the original horseshoe vortex from strong to weak, from larger to smaller and less, from unsteady to steady, then result in suppressing turbulence, reducing noise, avoiding vibration in engineering. Smoke wire flow visualization and laser light sheet flow visualization were used in the study. Results reveal that the vortex can be eliminated completely or its strength can be reduced significantly by arranging an interfering cylinder at appropriate distance from the leading edge of the juncture region. Results show that the best location arrangement of interfering cylinder is the juncture region, where original horseshoe vortexes appear. The mechanism of using interfering cylinder to weaken the horseshoe vortex structure of the main juncture is also discussed in this paper. Moreover, the effect of cross section shape and geometric parameter such as windward width and aspect ratio of interfering cylinder on the vortex controlling was also experimentally studied.
%K juncture flow
%K separation flow
%K horseshoe vortex
%K flow control
%K smoke wire flow visualization<br>角区
%K 分离流
%K 马蹄涡
%K 流动控制
%K 烟线法流动显示
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=5D344E2AD54D14F8&jid=49067A0A0D864088C06A84AACB51A5B2&aid=EB1EEE94DAF205C69778DB5454BCAF2F&yid=9377ED8094509821&vid=96C778EE049EE47D&iid=B31275AF3241DB2D&sid=34D13857B558254E&eid=AF14A8B15FB15A64&journal_id=1001-4888&journal_name=实验力学&referenced_num=0&reference_num=23