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Hot-Gas Side Jet in a Supersonic Freestream

Stahl, Bernhard and Siebe, Frank and Gülhan, Ali (2010) Hot-Gas Side Jet in a Supersonic Freestream. Journal of Spacecraft and Rockets, 47 (6), pp. 957-965. AIAA.

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The present paper reports on the interaction of a hot side jet in a supersonic freestream and compares the effects with results from cold-gas jet investigations. With high-speed schlieren videos, a significant enlargement of the separation area has been ascertained upstream from the hot-gas jet and quantitatively confirmed with wall pressure measurements. The schlieren videos also show a strong oscillation of the separation and bow shock. By using an algorithm that analyzes the similarity of neighboring images, the oscillation frequency of the separation and bow shock has been measured to be 11.3 kHz. As a consequence of the dominant shocks in the area in front of the jet, the hot jet plume is screened off strongly from the freestream, thus resulting in an upstream inclination. Finally, high-speed videos have revealed large-scale structures in the hot-gas jet and their convection velocities have been analyzed. According to the shocks, the large-scale structures oscillate at 11.3 kHz. Jet oscillation is thus excited by the interaction of the hot-gas jet with the freestream and not by resonances from the combustion chamber.

Document Type:Article
Title:Hot-Gas Side Jet in a Supersonic Freestream
AuthorsInstitution or Email of Authors
Stahl, BernhardDLR
Siebe, FrankDLR
Gülhan, AliDLR
Journal or Publication Title:Journal of Spacecraft and Rockets
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 957-965
Series Name:Journal of Spacecraft and Rockets
Keywords:Side jet, supersonic flow, hot gas jet, vehicle control, experiments
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Military Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Supersonic and Hypersonic Technology
Deposited By: Christine Adams
Deposited On:17 Mar 2011 09:53
Last Modified:07 Feb 2013 20:35

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