Журнал аэронавтики и аэрокосмической техники
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Study and Analysis of Visualizations of Vortex Strectures Developed on the Upper Surface of the Cone of Revolution and the Prophile view of Vortex Shards.

Dr Abderrahmane. ABENE

Visualizations and analysis of the flows, developed on the upper face of delta or gothic wings and cones, were carried out in the wind tunnel of the aerodynamics and hydrodynamics laboratory of the Hautes de France Polytechnic University of Valenciennes. These analyzes made it possible to better understand the behavior of the evolution and the positioning of the vortex structures and made it possible in particular to determine the preferential character of the interortex angles thus defined. Such a notable angular characterization revealed, in the case of delta and Gothic wings, the existence of a simple law, that of filiation, which is expressed in an angular correspondence between the main vortex couple and the leading edges. of the wing. The study of the vortical structures developed on the upper face of the cones resulted in an equally simple definition, also called the law of filiation, which, by analogy, is applicable to an angular correspondence between the main and secondary vortex pairs. This article, which is limited to discussing the case of a cone having an included angle of 68.6 °, provides a detailed description of the phenomenon. However, no current theory seems to be able to provide a simple explanation for these vortex behavioral properties.