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On the Flow Physics of a Low Momentum Flux Ratio Jet in a Supersonic Turbulence Crossflow

You, Yancheng and Lüdeke, Heinrich and Hannemann, Klaus (2012) On the Flow Physics of a Low Momentum Flux Ratio Jet in a Supersonic Turbulence Crossflow. Europhysics Letters, 97 (2), pp. 1-7. IOPScience. DOI: 10.1209/0295-5075/97/24001. ISSN 0295-5075.

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Official URL: http://iopscience.iop.org/0295-5075/97/2/24001


Detached Eddy Simulations (DES) study of the low momentum flux ratio jet, J = (ρu2 )jet /(ρu2 )∞ = 0.35, in the HyShot II scramjet system is carried out. The flow structure near the injector, shock pattern in the symmetry plane as well as the instantaneous coherent structures are presented and explained in the paper. Different from most previous studies, over-expanded and under-expanded flow states occur simultaneously at the exit of the current jet porthole. The shock system near the injector is therefore a combination of detached normal shock and a small three-dimensional barrel shock ended with a Mach disk. Further insight into the flow physics is conducted by visualizing instantaneous coherent structures. The formation of Ω shaped vortex, which was observed in experiments previously, but never well-studied numerically, is discussed in detail. A new understanding of the key flow physics and mixing patterns in the low-momentum flux-ratio jet in supersonic crossflow is finally schematically provided.

Document Type:Article
Additional Information:Paper: 24001
Title:On the Flow Physics of a Low Momentum Flux Ratio Jet in a Supersonic Turbulence Crossflow
AuthorsInstitution or Email of Authors
You, Yanchengyancheng.you@dlr.de
Lüdeke, Heinrichheinrich.luedeke@dlr.de
Hannemann, Klausklaus.hannemann@dlr.de
Journal or Publication Title:Europhysics Letters
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 1-7
Keywords:Turbulent jets, Mixing, Hydrogen injection, Detached Eddy Simulation, Scramjet
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transport
DLR - Research area:Raumfahrt
DLR - Program:R RP - Raumtransport
DLR - Research theme (Project):R - EU Projekte Raumtransport
Location: Braunschweig , Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Yancheng You
Deposited On:30 Nov 2011 11:38
Last Modified:26 Mar 2015 17:35

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