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Title: Side force suppression by dimples on ogive-cylinder body
Authors: Cui, Y.D. 
Tsai, H.M. 
Issue Date: Apr-2009
Citation: Cui, Y.D.,Tsai, H.M. (2009-04). Side force suppression by dimples on ogive-cylinder body. AIAA Journal 47 (4) : 1046-1049. ScholarBank@NUS Repository.
Abstract: The effectiveness of dimples in suppressing the large side forces over an ogival-cylinder body at high angles of attack was examined. The experiments were made in the low speed wind-tunnel and water tunnel and the measurements were made at a freestream velocity with a freestream turbulent intensity less than 0.4%. A smooth ogive-cylinder model with a nose length of 122.5 mm and a total body length of 560 mm was used as the baseline. The side force is found to significantly reduced at an angle of attack of 40 deg, while at 50 deg, the side force show values comparable to those without dimples and with a higher level of fluctuations. The existence of dimples on the front portion of the ogive-cylinder model modifies the flowfield leading to reduced side force at high angles of attack. The flow structures for different roll angles are almost the same at 40 deg, and the vortex asymmetry is found at 50 deg.
Source Title: AIAA Journal
ISSN: 00011452
DOI: 10.2514/1.39176
Appears in Collections:Staff Publications

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