What is it about?
The researchers looked at the generated vortex behind an axisymmetric object like a cone, focusing on how the angle at which the cone is positioned (angle of attack or AoA) affects the formation of swirling patterns, the symmetry of the vortex, the forces acting on the surface, and the changing pressure on the cone's surface. This study examined a range of angles from 15 to 75 degrees. When the angle was set at 75 degrees, any alterations in the sideways force, air resistance (drag), and upward force (lift) were influenced by the primary swirling pattern. The main reason for uneven side force was the asymmetry in the primary swirling pattern which is quantified in this study. The researchers suggested that more investigations are needed to explore the formation and ongoing movement of swirling patterns in other cone-shaped objects and combinations of cone and cylinder shapes, such as ogive, cone-cylinder, and ogive-cylinder objects.
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Perspectives
It is exciting to see the quantitative side force contribution of the asymmetric primary vortex pair in the wake of an axisymmetric body (cone) at a high angle of attack.
Al Shahriar
FAMU-FSU College of Engineering
Read the Original
This page is a summary of: Vortex interactions in the wake of the axisymmetric body in uniform cross-stream, January 2021, American Institute of Aeronautics and Astronautics (AIAA),
DOI: 10.2514/6.2021-0026.
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