Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/111565
Title: Effects of spanwise geometric disturbances on a bluff body wake
Authors: Chng, T.L. 
Tsai, H.M. 
Issue Date: 2006
Citation: Chng, T.L.,Tsai, H.M. (2006). Effects of spanwise geometric disturbances on a bluff body wake. Collection of Technical Papers - 3rd AIAA Flow Control Conference 2 : 942-954. ScholarBank@NUS Repository.
Abstract: Previous studies have shown that spanwise, geometric variations in the trailing edge of a base flow can give rise to significant base pressure reduction. In this study, wind tunnel experiments are conducted on a bluff model modified to include both straight-edged and wavy geometric disturbances, whilst essentially retaining the shape of the base. The results show that the base pressure recovery can be as high as 23% for a straight-edged disturbance and 27% for an in-pbase asymmetric disturbance. From a base drag reduction optimization objective, an in-phase wavy disturbance is found to perform better than a straight-edged profile. Finally, the observed base pressure recovery Is consistently accompanied by an attendant increase in the dominant shedding frequency.
Source Title: Collection of Technical Papers - 3rd AIAA Flow Control Conference
URI: http://scholarbank.nus.edu.sg/handle/10635/111565
ISBN: 1563478137
Appears in Collections:Staff Publications

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