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On the Effects of Transverse-Jet Injection into a Supersonic Shear Layer

Maddalena, Luca and Dimotakis, Paul E. (2010) On the Effects of Transverse-Jet Injection into a Supersonic Shear Layer. In: 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition. American Institute of Aeronautics and Astronautics , Reston, VA, Art. No. 2010-755. ISBN 9781600869594. https://resolver.caltech.edu/CaltechAUTHORS:20190930-110458086

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Abstract

This paper reports on observations in supersonic flow experiments conducted in an expansion-turn geometry, augmented by inclined-jet injection, in the Supersonic Shear Layer (S^3L) facility at Caltech. The experiments, designed to exploit hydrodynamic instabilities in compressible shear layers, were conducted in a non-reacting environment and at moderate compressibility. A shear layer is formed between a supersonic upper stream (M_1=1.5) and a subsonic lower stream (U_R=8.5 m/s) injected at an angle α = 30° with respect to the horizontal. The coupling of streamwise vortices generated by 5 jets inclined at 30° with respect to the free-stream and the shear layer was investigated. The Color schlieren images illustrate some of the phenomenology associated with transverse-jet injection and shear-layer interaction, and characterize the jet influence on shear-layer entrainment. A substantial increase of the shear layer thickness compared to the unperturbed case (without transverse jets) is reported for a jet-to-freestream momentum flux ratio, q̄, of 2.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.2514/6.2010-755DOIArticle
Additional Information:© 2010 American Institute of Aeronautics and Astronautics.
Group:GALCIT
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AIAA Paper2010-755
Record Number:CaltechAUTHORS:20190930-110458086
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190930-110458086
Official Citation: On the Effects of Transverse-Jet Injection into a Supersonic Shear Layer. Luca Maddalena and Paul Dimotakis. 48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition. January 2010. https://doi.org/10.2514/6.2010-755
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98934
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:01 Oct 2019 14:37
Last Modified:03 Oct 2019 21:45

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