Experimental Investigation of the Effects of Arrangement of Vortex Generators on Behavior of a Vortical Flow around an Axisymmetric Body

Document Type : Original Article

Author

Faculty of Mechanical Engineering Department Imam Ali University

Abstract

Axisymmetric bodies, like submarines, at high angles of attack have been characterized by three-dimensional boundary layer separation and large vortical structures, which have an important effect on forces and moments. This vortical flow affects acoustics, drag, and maneuverability. A suitable way to reduce the effect     of this separated and vortical flow is to use vortex generators, which have different arrangements, such as     counter-rotating and co-rotating. The present study aimed to investigate flow field around a standard model employing vortex generators with different arrangements, using a five-hole probe at 0°≤ α ≤20°. Application of five hole probe method can help to precisely study the structure of vortical flow field. The results show that counter-rotating vortex generators do indeed significantly reduce the strength of vortex, size of cross-flow vortices, and drag force.

Keywords

References

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History

  • Receive Date: 24 September 2018
  • Accept Date: 01 December 2018
  • Publish Date: 22 June 2019

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