Experimental study of effect of a pair of weak shock waves on laminar-turbulent transition in the boundary layer of flat plate at Mach number 2
https://doi.org/10.25205/2541-9447-2022-17-2-30-40
Abstract
An experimental study of the effect of longitudinal vortices generated by weak shock waves on the laminar-turbulent transition in the boundary layer of a flat plate at a Mach number 2 is conducted. To amplify the effect of the longitudinal vortices generation, a model with leading edge blunting radius of 0,5 mm was used. The disturbance intensity was measured with a constant temperature hotwire anemometer and a single-wire sensor. To change the Reynolds numbers in the flow, the method of varying the pressure in the pretest section of a supersonic wind tunnel was used. According to the experimental conditions, the level of mass flow perturbations in the test section T325 of ITAM SB RAS did not exceed 0,1 % of the mean flow in the frequency range from 0,2 to 50 kHz. In this work, it is obtained for the first time that stationary streamwise vortices that arise in the boundary layer of a flat plate because of the action of a pair of weak shock waves on its leading edge lead to an early laminar-turbulent transition at different Reynolds numbers. In the case of a homogeneous boundary layer, the transition is achieved at Rex ≈ 3,1 × 106, and in measurements in the region of vortices from shock waves at Rex ≈ 1,5 × 106 and Rex ≈ 2 × 106.
About the Authors
M. V. Piterimova
S. A. Khristianovich Institute of Theoretical and Applied Mechanics
Russian Federation
Russian Federation
Marina V. Piterimova, junior researcher
Novosibirsk
А. D. Kosinov
S. A. Khristianovich Institute of Theoretical and Applied Mechanics
Russian Federation
Russian Federation
Alexander D. Kosinov, Doctor of Physical and Mathematical Sciences, Senior Research Officer, Head of laboratory
Novosibirsk
N. V. Semionov
S. A. Khristianovich Institute of Theoretical and Applied Mechanics
Russian Federation
Russian Federation
Nikolay V. Semionov, Doctor of Physical and Mathematical Sciences, Senior Research Officer, Leading researcher
Novosibirsk
A. A. Yatskikh
S. A. Khristianovich Institute of Theoretical and Applied Mechanics
Russian Federation
Russian Federation
Aleksey A. Yatskikh, Candidate of Physical and Mathematical Sciences, junior researcher
Novosibirsk
V. L. Kocharin
S. A. Khristianovich Institute of Theoretical and Applied Mechanics
Russian Federation
Russian Federation
Vasily L. Kocharin, junior researcher
Novosibirsk
Yu. G. Yermolaev
S. A. Khristianovich Institute of Theoretical and Applied Mechanics
Russian Federation
Russian Federation
Yuri G. Yermolaev, Candidate of Physical and Mathematical Sciences, Senior Research Officer
Novosibirsk
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Review
For citations:
Piterimova M.V., Kosinov А.D., Semionov N.V., Yatskikh A.A., Kocharin V.L., Yermolaev Yu.G. Experimental study of effect of a pair of weak shock waves on laminar-turbulent transition in the boundary layer of flat plate at Mach number 2. SIBERIAN JOURNAL OF PHYSICS. 2022;17(2):30-40. (In Russ.) https://doi.org/10.25205/2541-9447-2022-17-2-30-40
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