Density and Pressure Fluctuations in a Turbulent Flow of Air and Argon and Their Interaction with a Shock Wave

Turbulent fluctuations of density and pressure in air and argon in a shock tube have been investigated, as well as their interaction with a shock wave reflected from a perforated plate at the end of the shock tube. The Mach number of the incident shock was 1.9–3.9, while that of the reflected shock...

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Bibliographic Details
Published in:Moscow University physics bulletin 2019-05, Vol.74 (3), p.256-261
Main Authors: Dokukina, O. I., Terentiev, E. N., Shtemenko, L. S., Shugaev, F. V.
Format: Article
Language:English
Subjects:
Acoustics
Aerodynamics
Argon
Density
Electronics
Fluid dynamics
Laminar flow
Mach number
Mathematical and Computational Physics
Overpressure
Perforated plates
Physics
Physics and Astronomy
Radiophysics
Shock waves
Theoretical
Turbulent flow
Variation
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Summary:Turbulent fluctuations of density and pressure in air and argon in a shock tube have been investigated, as well as their interaction with a shock wave reflected from a perforated plate at the end of the shock tube. The Mach number of the incident shock was 1.9–3.9, while that of the reflected shock was 1.4–2.4. The turbulent length scale behind the incident shock was measured. That behind the reflected shock was a few times less than that behind the incident shock. It was established that overpressure occurs in the turbulent flow behind the reflected shock compared with the laminar flow, all other things being equal. The value of the overpressure is 12% in argon and 9% in air.
ISSN:0027-1349
1934-8460
DOI:10.3103/S0027134919030056