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Turbulent structure in supersonic jets with a high Reynolds number

Turbulent structure in supersonic jets with a high Reynolds number Abstract The turbulent properties of a supersonic jet were studied related to a high level of pressure pulsation found in model jets of a reentry flight vehicle approaching the landing ground. This study comprised measurements of total pressure at a small-size target using a dynamic pressure probe placed in a free jet. The most comprehensive data about jet turbulence can be obtained by direct transformation of the pressure reading at the stagnation point near the target into the normalized velocity. The oscillogram of normalized velocity produces the velocity average value, root-mean-square value as well as turbulence intensity and turbulence spectrum. It was demonstrated that a high level of turbulence for a high-head jet retains along the supersonic core length and at the beginning of subsonic interval. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Thermophysics and Aeromechanics Springer Journals

Turbulent structure in supersonic jets with a high Reynolds number

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Publisher
Springer Journals
Copyright
2018 Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences
ISSN
0869-8643
eISSN
1531-8699
DOI
10.1134/S0869864318040017
Publisher site
See Article on Publisher Site

Abstract

Abstract The turbulent properties of a supersonic jet were studied related to a high level of pressure pulsation found in model jets of a reentry flight vehicle approaching the landing ground. This study comprised measurements of total pressure at a small-size target using a dynamic pressure probe placed in a free jet. The most comprehensive data about jet turbulence can be obtained by direct transformation of the pressure reading at the stagnation point near the target into the normalized velocity. The oscillogram of normalized velocity produces the velocity average value, root-mean-square value as well as turbulence intensity and turbulence spectrum. It was demonstrated that a high level of turbulence for a high-head jet retains along the supersonic core length and at the beginning of subsonic interval.

Journal

Thermophysics and AeromechanicsSpringer Journals

Published: Jul 1, 2018

References