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, Vol. 97 (2). 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.
|Title:||On the Flow Physics of a Low Momentum Flux Ratio Jet in a Supersonic Turbulence Crossflow|
|Journal or Publication Title:||Europhysics Letters|
|In Open Access:||No|
|In ISI Web of Science:||Yes|
|Series Name:||EPL(Europhysics Letters)|
|Keywords:||Turbulent jets, Mixing, Hydrogen injection, Detached Eddy Simulation, Scramjet|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Raumfahrt|
|HGF - Program Themes:||R RP - Raumtransport|
|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 2013 13:34|
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