Scalar spatial correlations in a supersonic mixing flowfield

Hidemi Takahashi; Hiroki Oso; Toshinori Kouchi; Goro Masuya; Mitsutomo Hirota

Scalar spatial correlations in a supersonic mixing flowfield

Hidemi Takahashi, Hiroki Oso, Toshinori Kouchi, Goro Masuya, Mitsutomo Hirota

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Scalar spatial correlations in the supersonic mixing flowfield produced by a sonic transverse injection of air into a Mach 2.0 supersonic airstream were investigated using acetone planar laser-induced fluorescence (acetone PLIF) data. Side-view and end-view images were obtained in several planes to characterize the turbulent structure and three-dimensionality of the mixing flowfield. Single-time two-point spatial correlations of injectant concentration were obtained from the acetone PLIF data. Contour maps of the correlations indicated an organized large-scale structure in the upper region of the jet. Side-view correlation maps revealed that the shape of the large dominating structure was elliptic, and that its major axis turned from backward-leaning to forward-leaning as the reference point of correlation moved downstream. End-view correlation maps revealed that the instantaneous jet plume appeared by turns either in the top or in the lower sides of the timeaveraged injectant plume in each cross-section.

Original language	English
Title of host publication	47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition
Publication status	Published - Dec 1 2009
Externally published	Yes
Event	47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition - Orlando, FL, United States Duration: Jan 5 2009 → Jan 8 2009

Publication series

Name	47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition

Other

Other	47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition
Country	United States
City	Orlando, FL
Period	1/5/09 → 1/8/09

ASJC Scopus subject areas

Space and Planetary Science
Aerospace Engineering

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Scalar spatial correlations in a supersonic mixing flowfield. / Takahashi, Hidemi; Oso, Hiroki; Kouchi, Toshinori; Masuya, Goro; Hirota, Mitsutomo.

47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition. 2009. 2009-0023 (47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Takahashi, H, Oso, H, Kouchi, T, Masuya, G & Hirota, M 2009, Scalar spatial correlations in a supersonic mixing flowfield. in 47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition., 2009-0023, 47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, 47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition, Orlando, FL, United States, 1/5/09.

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title = "Scalar spatial correlations in a supersonic mixing flowfield",

abstract = "Scalar spatial correlations in the supersonic mixing flowfield produced by a sonic transverse injection of air into a Mach 2.0 supersonic airstream were investigated using acetone planar laser-induced fluorescence (acetone PLIF) data. Side-view and end-view images were obtained in several planes to characterize the turbulent structure and three-dimensionality of the mixing flowfield. Single-time two-point spatial correlations of injectant concentration were obtained from the acetone PLIF data. Contour maps of the correlations indicated an organized large-scale structure in the upper region of the jet. Side-view correlation maps revealed that the shape of the large dominating structure was elliptic, and that its major axis turned from backward-leaning to forward-leaning as the reference point of correlation moved downstream. End-view correlation maps revealed that the instantaneous jet plume appeared by turns either in the top or in the lower sides of the timeaveraged injectant plume in each cross-section.",

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AU - Takahashi, Hidemi

AU - Oso, Hiroki

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AU - Masuya, Goro

AU - Hirota, Mitsutomo

PY - 2009/12/1

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N2 - Scalar spatial correlations in the supersonic mixing flowfield produced by a sonic transverse injection of air into a Mach 2.0 supersonic airstream were investigated using acetone planar laser-induced fluorescence (acetone PLIF) data. Side-view and end-view images were obtained in several planes to characterize the turbulent structure and three-dimensionality of the mixing flowfield. Single-time two-point spatial correlations of injectant concentration were obtained from the acetone PLIF data. Contour maps of the correlations indicated an organized large-scale structure in the upper region of the jet. Side-view correlation maps revealed that the shape of the large dominating structure was elliptic, and that its major axis turned from backward-leaning to forward-leaning as the reference point of correlation moved downstream. End-view correlation maps revealed that the instantaneous jet plume appeared by turns either in the top or in the lower sides of the timeaveraged injectant plume in each cross-section.

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