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Article
EFFECT OF INTERNAL PYLONS ON THE PARAMETERS OF THE JET FLOW IN A NOZZLE WITH A CENTRAL BODY
A high-velocity flow in an axisymmetric nozzle containing a central body and pylons is studied. The influence of the geometry of the main and additional pylons on the gas-dynamic and thrust characteristics at ...
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Article
Formation of a separation vortex in the vicinity of a dihedral corner configuration at M∞ = 2.27 and α ≤ 6°
The article considers the development of a near-wall separation vortex arising at a supersonic flow around the external dihedral corner due to the pressure drop between its faces, in the range of angles of att...
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Article
RECONSTRUCTION OF TRANSONIC FLOW PARAMETERS IN THE CONE WAKE
This paper presents a method for reconstructing the gas-dynamic parameters of gas flow based on non-contact PIV measurements of the velocity field. The wake flow past a model single rocket nozzle of an emergen...
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Article
Probe influence on total pressure measurements in the zone of supersonic laminar separated flow reattachment
The influence of the Pitot probe on total pressure measurements in the near-wall flow in the zone of reattachment of a supersonic separated flow past a compression corner is considered. If the total pressure i...
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Article
REATTACHMENT OF A LAMINAR SEPARATED FLOW AT A HYPERSONIC VELOCITY OF THE FLOW
This paper describes a study of a laminar separated flow in a compression corner for the Mach number of the incident flow M = 6 and 8. The shock-wave structure of the flow in its reattachment region is conside...
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Article
Evolution of a stall vortex over an external dihedral corner in a supersonic flow
The work is devoted to the study of a vortex system formed in a flow past a streamwise-aligned external dihedral corner due to the drop of pressure between the corner faces. A detailed comparison of experiment...
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Article
Unsteady Pseudo-Jump in a Shock Tube
This paper describes a numerical simulation of an unsteady axisymmetric flow in a shock tube, which arises as a strong shock wave incident on the end face of the tube is reflected under conditions in which a c...
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Article
Experimental Investigation of the Nozzle Roughness Effect on the Flow Parameters in the Mixing Layer of an Axisymmetric Subsonic High-Velocity Jet
The paper presents the results of an experimental investigation of the mixing layer parameters in the initial regions of transonic jets issuing from convergent nozzles with different internal roughness at the ...
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Article
Effect of Air Blowing and Suction Through Single Slots on the Aerodynamic Performances of an Airfoil
Steady air blowing (suction) into a turbulent boundary layer on the NACA 0012 airfoil through singular slots located on the opposite sides near the trailing edge is studied experimentally and numerically. The ...
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Article
Modification of turbulent airfoil section flow using a combined control action
Both numerically and experimentally, the possibility of using a combined method to control the incompressible turbulent boundary layer on a symmetric airfoil section of 12-% relative thickness implemented via ...
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Article
Peculiarities of the flows forming in processes of an impulse starting of a supersonic wind tunnel with different diffusers
The peculiarities of supersonic unsteady flows forming in the processes of an impulse starting of a wind tunnel including a fore-chamber, a nozzle, a diffuser, and an exhaust tank are considered. The fore-cham...
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Article
Development of the Air Blowing and Suction Technology for Control of a Turbulent Flow on an Airfoil
The possibility of using a combined method of control of an incompressible turbulent boundary layer on the NACA 0012 airfoil is studied experimentally and numerically. The method is based on air blowing and su...
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Article
Turbulent Boundary Layer on a Finely Perforated Surface Under Conditions of Air Injection at the Expense of External Flow Resources
The characteristics of an incompressible turbulent boundary layer on a flat plate with air blown in though a finely perforated surface from an external confined flow through an input device, located on the "id...
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Article
Control of turbulent boundary layer through air blowing due to external-flow resources
The possibility to control turbulent incompressible boundary layer using air blowing through a finely perforated wall presenting part of the streamlined flat-plate surface was examined. The control was exercis...
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Article
Flow structure formed due to interaction of a supersonic jet with a porous obstacle
Results of studying im**ement of a supersonic underexpanded air jet onto a finite-thickness porous metal obstacle whose frontal plane is normal to the jet axis and whose side surface is impermeable for the g...
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Article
High-pressure layer generation in a compression corner at a supersonic flow velocity
The results of an experimental and numerical investigation of a three-dimensional laminar separated flow in a compression corner are presented. The freestream Mach number M∞ =6. The model under study is a plate w...
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Article
Im**ement of a supersonic underexpanded jet onto obstacles with different permeabilities
Results of an experimental study of the flow structure and characteristics of flow oscillations induced by im**ing of a supersonic underexpanded jet onto obstacles made of permeable and impermeable materials...
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Article
Flow structure at the initial section of a supersonic jet exhausting from a nozzle with chevrons
The spatial structure of the flow in a supersonic underexpanded jet exhausting from a convergent nozzle with vortex generators (chevrons) at the exit is experimentally studied. Exhaustion of a supersonic under...
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Article
Experimental study of the reverse flow in the forward separation region in a pulsating flow around a spiked body
The flow with a free-stream Mach number M ∞ = 6 around a cylindrical body with a sharp spike is studied. The existence of a supersonic reverse flow for one of the phases of the pulsating f...
