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Experimental Study by Visualisation of Behavioural Properties of Vortex Structures on the Upper Surface of an Ogive of Revolution ß 52°

Received: 20 October 2014    Accepted: 3 November 2014    Published: 10 November 2014
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Abstract

A large number of studies of flow visualisations, developed on the upper surface of delta or gothic wings and on that of ogives of revolution, have been carried out in the wind tunnel of the Valenciennes University aerodynamics and hydrodynamics laboratory (LAH). These studies have provided a better understanding of the development and the positioning of vortex structures and have enabled, in particular, the preferential nature of intervortex angles, thereby defined, to be determined on a wide range of Reynolds. This paper concerns in particular the study by visualisations of the behavioural properties on the upper surface of an ogive of revolution having an apex angle of 68.6° at a low angle of attack and conducted at variable speeds. It has been noted that variations in speed have no influence at all on the behavioural properties of the development of vortex structures whereas, by contrast, changes to the angles of incidence do indeed strongly influence that development. The study of the ascent of the vortex breakdown at high angles of attack has revealed original behavioural properties which find expression notably in the discontinuous evolution, in terms of the apex angle, of those angles of attack which define the beginning and the end of the ascent of this vortex breakdown. These properties undoubtedly reflect those already observed in similar studies carried out on delta and gothic wings and on cones. However, no current theory seems to be able to provide a straightforward explanation of these phenomena.

Published in International Journal of Mechanical Engineering and Applications (Volume 2, Issue 5)
DOI 10.11648/j.ijmea.20140205.13
Page(s) 70-77
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This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Vortex, Visualization, Structures, Reynolds, Speed

References
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    Abderrahmane Abene. (2014). Experimental Study by Visualisation of Behavioural Properties of Vortex Structures on the Upper Surface of an Ogive of Revolution ß 52°. International Journal of Mechanical Engineering and Applications, 2(5), 70-77. https://doi.org/10.11648/j.ijmea.20140205.13

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    ACS Style

    Abderrahmane Abene. Experimental Study by Visualisation of Behavioural Properties of Vortex Structures on the Upper Surface of an Ogive of Revolution ß 52°. Int. J. Mech. Eng. Appl. 2014, 2(5), 70-77. doi: 10.11648/j.ijmea.20140205.13

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    AMA Style

    Abderrahmane Abene. Experimental Study by Visualisation of Behavioural Properties of Vortex Structures on the Upper Surface of an Ogive of Revolution ß 52°. Int J Mech Eng Appl. 2014;2(5):70-77. doi: 10.11648/j.ijmea.20140205.13

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  • @article{10.11648/j.ijmea.20140205.13,
      author = {Abderrahmane Abene},
      title = {Experimental Study by Visualisation of Behavioural Properties of Vortex Structures on the Upper Surface of an Ogive of Revolution ß 52°},
      journal = {International Journal of Mechanical Engineering and Applications},
      volume = {2},
      number = {5},
      pages = {70-77},
      doi = {10.11648/j.ijmea.20140205.13},
      url = {https://doi.org/10.11648/j.ijmea.20140205.13},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmea.20140205.13},
      abstract = {A large number of studies of flow visualisations, developed on the upper surface of delta or gothic wings and on that of ogives of revolution, have been carried out in the wind tunnel of the Valenciennes University aerodynamics and hydrodynamics laboratory (LAH). These studies have provided a better understanding of the development and the positioning of vortex structures and have enabled, in particular, the preferential nature of intervortex angles, thereby defined, to be determined on a wide range of Reynolds. This paper concerns in particular the study by visualisations of the behavioural properties on the upper surface of an ogive of revolution having an apex angle of 68.6° at a low angle of attack and conducted at variable speeds. It has been noted that variations in speed have no influence at all on the behavioural properties of the development of vortex structures whereas, by contrast, changes to the angles of incidence do indeed strongly influence that development. The study of the ascent of the vortex breakdown at high angles of attack has revealed original behavioural properties which find expression notably in the discontinuous evolution, in terms of the apex angle, of those angles of attack which define the beginning and the end of the ascent of this vortex breakdown. These properties undoubtedly reflect those already observed in similar studies carried out on delta and gothic wings and on cones. However, no current theory seems to be able to provide a straightforward explanation of these phenomena.},
     year = {2014}
    }
    

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    AU  - Abderrahmane Abene
    Y1  - 2014/11/10
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    T2  - International Journal of Mechanical Engineering and Applications
    JF  - International Journal of Mechanical Engineering and Applications
    JO  - International Journal of Mechanical Engineering and Applications
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    AB  - A large number of studies of flow visualisations, developed on the upper surface of delta or gothic wings and on that of ogives of revolution, have been carried out in the wind tunnel of the Valenciennes University aerodynamics and hydrodynamics laboratory (LAH). These studies have provided a better understanding of the development and the positioning of vortex structures and have enabled, in particular, the preferential nature of intervortex angles, thereby defined, to be determined on a wide range of Reynolds. This paper concerns in particular the study by visualisations of the behavioural properties on the upper surface of an ogive of revolution having an apex angle of 68.6° at a low angle of attack and conducted at variable speeds. It has been noted that variations in speed have no influence at all on the behavioural properties of the development of vortex structures whereas, by contrast, changes to the angles of incidence do indeed strongly influence that development. The study of the ascent of the vortex breakdown at high angles of attack has revealed original behavioural properties which find expression notably in the discontinuous evolution, in terms of the apex angle, of those angles of attack which define the beginning and the end of the ascent of this vortex breakdown. These properties undoubtedly reflect those already observed in similar studies carried out on delta and gothic wings and on cones. However, no current theory seems to be able to provide a straightforward explanation of these phenomena.
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Author Information
  • Université de Valenciennes, Laboratoire d'Aérodynamique, d'Energétique et de l’Environnement, I. S. T. V, Valenciennes, 59300 Aulnoy lez valenciennes France

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