On the supersonic flow over an axisymmetric step at an angle of attack

M. M. Simonenko, S. V. Guvernyuk, A. G. Kuzmin

Research output

Abstract

The work addresses 3D supersonic flow over a stepped axisymmetric body with a nose cone. Dependencies of flow regimes on the angle of attack α and length L of the body part ahead of the step are studied. Experiments were conducted in the A-7 wind tunnel of the Research Institute of Mechanics, Moscow State University, at a free-stream Mach number of 3. The study reveals bands of the angle α and length L in which flow pressure on the leeward side of step increases with increasing α or L, and eventually it exceeds the pressure on the windward side. Numerical simulations are performed with a finite-volume solver on the basis of URANS equations. The supersonic flow structure at a given length L and angles of attack from 0 to 16°is scrutinized. The simulations unveil a supersonic jet propagating along the body leeward side. The jet is located between a pair of side vortices formed due to a development of the transversal flow separation. At α>5°and sufficiently large L, the supersonic jet impact creates a spot of anomalously high pressure on the leeward side of the step.

Original languageEnglish
JournalAIP Conference Proceedings
Volume2027
DOIs
Publication statusPublished - 2 Nov 2018
Event19th International Conference on the Methods of Aerophysical Research, ICMAR 2018 - Akademgorodok, Novosibirsk
Duration: 13 Aug 201819 Aug 2018

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supersonic flow
angle of attack
nose cones
axisymmetric bodies
Moscow
flow separation
free flow
wind tunnels
Mach number
simulation
vortices

Scopus subject areas

  • Physics and Astronomy(all)

Cite this

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abstract = "The work addresses 3D supersonic flow over a stepped axisymmetric body with a nose cone. Dependencies of flow regimes on the angle of attack α and length L of the body part ahead of the step are studied. Experiments were conducted in the A-7 wind tunnel of the Research Institute of Mechanics, Moscow State University, at a free-stream Mach number of 3. The study reveals bands of the angle α and length L in which flow pressure on the leeward side of step increases with increasing α or L, and eventually it exceeds the pressure on the windward side. Numerical simulations are performed with a finite-volume solver on the basis of URANS equations. The supersonic flow structure at a given length L and angles of attack from 0 to 16°is scrutinized. The simulations unveil a supersonic jet propagating along the body leeward side. The jet is located between a pair of side vortices formed due to a development of the transversal flow separation. At α>5°and sufficiently large L, the supersonic jet impact creates a spot of anomalously high pressure on the leeward side of the step.",
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On the supersonic flow over an axisymmetric step at an angle of attack. / Simonenko, M. M.; Guvernyuk, S. V.; Kuzmin, A. G.

In: AIP Conference Proceedings, Vol. 2027, 02.11.2018.

Research output

TY - JOUR

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AU - Guvernyuk, S. V.

AU - Kuzmin, A. G.

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AB - The work addresses 3D supersonic flow over a stepped axisymmetric body with a nose cone. Dependencies of flow regimes on the angle of attack α and length L of the body part ahead of the step are studied. Experiments were conducted in the A-7 wind tunnel of the Research Institute of Mechanics, Moscow State University, at a free-stream Mach number of 3. The study reveals bands of the angle α and length L in which flow pressure on the leeward side of step increases with increasing α or L, and eventually it exceeds the pressure on the windward side. Numerical simulations are performed with a finite-volume solver on the basis of URANS equations. The supersonic flow structure at a given length L and angles of attack from 0 to 16°is scrutinized. The simulations unveil a supersonic jet propagating along the body leeward side. The jet is located between a pair of side vortices formed due to a development of the transversal flow separation. At α>5°and sufficiently large L, the supersonic jet impact creates a spot of anomalously high pressure on the leeward side of the step.

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