Velocity measurements in a shock-separated free shear layer

C. W. Palko; J. C. Dutton

doi:10.2514/6.1998-698

Velocity measurements in a shock-separated free shear layer

Research output: Contribution to conference › Paper › peer-review

Abstract

Two-component laser Doppler velocimetry (LDV) measurements were made in a planar, shock-separated free shear layer formed by the convergence of two supersonic streams past a thick plate. High-speed wall pressure measurements locate the unsteady shock wave formed by this interaction and, consequently, allow separation of the effects of shock motion from the turbulence fluctuations in the velocity measurements of the shear layer. Shock-induced separation dramatically increases the normal stresses and shear stress. The shock-separated shear layer displays a positive shear stress region between separation and reattachment. Reattachment produces a shift in turbulent kinetic energy from the streamwise component to the transverse component. The region of shock motion has a relatively constant width irrespective of distance from the wall.

Original language	English (US)
DOIs	https://doi.org/10.2514/6.1998-698
State	Published - 1998
Externally published	Yes
Event	36th AIAA Aerospace Sciences Meeting and Exhibit, 1998 - Reno, United States Duration: Jan 12 1998 → Jan 15 1998

Other

Other	36th AIAA Aerospace Sciences Meeting and Exhibit, 1998
Country/Territory	United States
City	Reno
Period	1/12/98 → 1/15/98

ASJC Scopus subject areas

General Engineering
Space and Planetary Science

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10.2514/6.1998-698

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title = "Velocity measurements in a shock-separated free shear layer",

abstract = "Two-component laser Doppler velocimetry (LDV) measurements were made in a planar, shock-separated free shear layer formed by the convergence of two supersonic streams past a thick plate. High-speed wall pressure measurements locate the unsteady shock wave formed by this interaction and, consequently, allow separation of the effects of shock motion from the turbulence fluctuations in the velocity measurements of the shear layer. Shock-induced separation dramatically increases the normal stresses and shear stress. The shock-separated shear layer displays a positive shear stress region between separation and reattachment. Reattachment produces a shift in turbulent kinetic energy from the streamwise component to the transverse component. The region of shock motion has a relatively constant width irrespective of distance from the wall.",

author = "Palko, {C. W.} and Dutton, {J. C.}",

note = "Publisher Copyright: {\textcopyright} 1998 by Carl Palko. Published by the American Institute of Aeronautics and Astronautics, Inc.; 36th AIAA Aerospace Sciences Meeting and Exhibit, 1998 ; Conference date: 12-01-1998 Through 15-01-1998",

year = "1998",

doi = "10.2514/6.1998-698",

language = "English (US)",

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T1 - Velocity measurements in a shock-separated free shear layer

AU - Palko, C. W.

AU - Dutton, J. C.

PY - 1998

Y1 - 1998

N2 - Two-component laser Doppler velocimetry (LDV) measurements were made in a planar, shock-separated free shear layer formed by the convergence of two supersonic streams past a thick plate. High-speed wall pressure measurements locate the unsteady shock wave formed by this interaction and, consequently, allow separation of the effects of shock motion from the turbulence fluctuations in the velocity measurements of the shear layer. Shock-induced separation dramatically increases the normal stresses and shear stress. The shock-separated shear layer displays a positive shear stress region between separation and reattachment. Reattachment produces a shift in turbulent kinetic energy from the streamwise component to the transverse component. The region of shock motion has a relatively constant width irrespective of distance from the wall.

AB - Two-component laser Doppler velocimetry (LDV) measurements were made in a planar, shock-separated free shear layer formed by the convergence of two supersonic streams past a thick plate. High-speed wall pressure measurements locate the unsteady shock wave formed by this interaction and, consequently, allow separation of the effects of shock motion from the turbulence fluctuations in the velocity measurements of the shear layer. Shock-induced separation dramatically increases the normal stresses and shear stress. The shock-separated shear layer displays a positive shear stress region between separation and reattachment. Reattachment produces a shift in turbulent kinetic energy from the streamwise component to the transverse component. The region of shock motion has a relatively constant width irrespective of distance from the wall.

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DO - 10.2514/6.1998-698

M3 - Paper

AN - SCOPUS:85085845918

T2 - 36th AIAA Aerospace Sciences Meeting and Exhibit, 1998

Y2 - 12 January 1998 through 15 January 1998

ER -

Velocity measurements in a shock-separated free shear layer

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