Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/116117
Title: Side force suppression by dimples on ogive-cylinder body at high angles of attack
Authors: Cui, Y.D. 
Tsai, H.M. 
Issue Date: 2008
Source: Cui, Y.D.,Tsai, H.M. (2008). Side force suppression by dimples on ogive-cylinder body at high angles of attack. 46th AIAA Aerospace Sciences Meeting and Exhibit : -. ScholarBank@NUS Repository.
Abstract: The effects of dimpled surface on the side forces and the separated vortex flow over an ogive-cylinder body at high angles of attack are experimentally investigated. Force measurements in a low speed wind tunnel show that the side forces can be suppressed even at 40° angle of attack without experiencing the distinctive bi-stable mode typical of smooth ogive-cylinder bodies. The pressure distributions show a more leeward turbulent flow separation. Low speed flow visualizations in a water tunnel show that the intermittently turbulent vortex structures from the different dimples influence the separation line and hence the main vortices. This results in the formation of a weaker unsteady symmetric vortex pair which greatly reduces the side forces at high angles of attack. This use of dimples for side forces suppression is robust with respect to variations in roll angles. Copyright © 2008 by the authors.
Source Title: 46th AIAA Aerospace Sciences Meeting and Exhibit
URI: http://scholarbank.nus.edu.sg/handle/10635/116117
ISBN: 9781563479373
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

32
checked on Jan 20, 2018

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.