NDLI: Distinctive features of the shock layer flow structure in conical gas flows

Content Provider	Springer Nature Link
Author	Zubin, M. A. Maksimov, F. A. Ostapenko, N. A.
Copyright Year	2014
Abstract	The results of a numerical and experimental investigation of the flow structure in symmetric and nonsymmetric flows around V-wings with attached shocks on the leading edges are presented. Emphasis is placed on the appearance of new critical points, including vortex Ferri singularities, in the shock layer and transformations in the flow structure with increase in the angles of attack and yaw. In particular, it is established that the flow structure in the plane of symmetry of the flow around V-wings without yaw, which involves the Mach-type shock configuration, undergoes a jumpwise variation with increase in the angle of attack. Additionally to one Ferri singularity of the node type located at the corner point of the transverse wing contour in the plane of symmetry of the flow, there arise two more critical points, those of flow divergence and convergence. The latter point is the second Ferri singularity; it is located nearer to the bridge-shaped shock of the Mach-type shock system and can be of both the node and the saddle type. In the latter case there appear two vortex Ferri singularities located at the vertices of the contact discontinuities proceeding from this critical point on both sides of the plane of symmetry. Certain data on the position of the critical points relative to the wing contour bend are presented as functions of the wing geometry, together with the transformation of the topological shock-layer flow pattern in the presence of yaw. The comparison of the results calculated within the framework of the Euler model with the experimental data on the shock-layer flow structure obtained using a special optical method for visualizing conical flows showed their good agreement.
Starting Page	804
Ending Page	818
Page Count	15
File Format	PDF
ISSN	00154628
Journal	Fluid Dynamics
Volume Number	49
Issue Number	6
e-ISSN	15738507
Language	English
Publisher	Pleiades Publishing
Publisher Date	2014-12-30
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	supersonic flows V-wing conical flows Mach-type shock configuration vortex Ferri singularities Fluid- and Aerodynamics Classical Continuum Physics Mechanics Engineering Fluid Dynamics
Content Type	Text
Resource Type	Article
Subject	Fluid Flow and Transfer Processes Physics and Astronomy Mechanical Engineering

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