Manipulation of vertical fence wake using passive vortex generators
Kim Hyoung-Bum, Kim Seoung-Jun, Tu Xin-Cheng, Park Seung-Ha
1.Research Center for Aircraft Parts Technology, Gyeongsang National University, Jinju 660-701, S. Korea; 2.School of Mechanical Engineering, Gyeongsang National University, Jinju 660-701, S. Korea; 3. R ＆ D Center, DongHwa Entec, Busan 618-230, S. Korea
摘要 he effect of streamwise vortices generated from passive vortex generators was investigated to manipulate the separation bubble behind the vertical fence. The experiments were carried out in a circulating water channel and the velocity fields were measured using 2D and stereoscopic PIV method. The distance between the vortex generator and fence and the effect of the Reynolds number were investigated. In addition, the effect of boundary layer thickness was also investigated. The averaged recirculation lengths were compared with that of uncontrolled fence flow. The results showed the oscillatory variation of recirculation region appeared under the existence of vortex generators. The reduction of the separation bubble became larger when the fence was submerged in the thick boundary layer with increasing the distance between the generator and fence. When the boundary layer is thin, vortex generator can only suppress the separation bubble under the specific condition.
The work was supported from the Priority Research Centers Program (2012-048078) and Basic Science Research Program (2012-008918) through the National Research Foundation (NRF) and a grant (08GASPLANTC04) from the program of KAIA funded by the Ministry of Land, Infrastructure and Transport of the Republic of Korea.
作者简介: HyoungBum Kim, associate professor (kimhb@gnu.ac.kr), research fields: flow measurement and control using optical and ultrasound method, turbulent shear flow, flow instability and bio-fluid flow.
引用本文:
Kim Hyoung-Bum, Kim Seoung-Jun, Tu Xin-Cheng, Park Seung-Ha. Manipulation of vertical fence wake using passive vortex generators[J]. 排灌机械工程学报, 2014, 32(5): 369-372.
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