Proceedings ArticleDOI
Supersonic mixing and combustion control using streamwise vortices
TLDR
In this article, the authors used streamwise vortices to enhance supersonic mixing and combustion control, and the results showed the effectiveness of the present streamwise Vortices for mixing enhancement.Abstract:
In this paper, we present our experimental and numerical results for the supersonic mixing and combustion control. Our strategy of enhancing supersonic mixing is to use streamwise vortices. The reasons are (1) that in supersonic flows streamwise vortices can be generated quite easily and almost without additional losses in total pressure such as those due to shock waves, (2) that their breakdown into smaller scale, which is essential for mixing enhancement, can be controlled by their geometry in spanwise row configurations and by various combinations of their scales, intensity of circulation and rotational directions, and (3)that the hydrogen fuel can be injected into their core region. Several kind of alternating wedge struts are tested to examine the effects of the cited various combinations on the mixing enhancement. By presenting those results, we will discuss the formation mechanism of streamwise vortices and their downstream development, in particular the interaction between themselves in spanwise row configurations, their eventual breakdown into turbulent eddies. Firing tests are also carried out and the results for alternating wedge strut will be presented together with the results for a generic fuel injection strut for comparison. The results show the effectiveness of the present streamwise vortices for supersonic mixing enhancement and combustion control.read more
Citations
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Journal ArticleDOI
Numerical Investigation of Mixing and Combustion Enhancement in Supersonic Combustors by Strut Induced Streamwise Vorticity
TL;DR: In this paper, a numerical study of mixing and combustion enhancement has been performed for a Mach 2 model scramjet (supersonic combustion ramjet) combustor Fuel (hydrogen) is injected at supersonic speed through the rear of a lobed strut located at the channel symmetry axis.
Journal ArticleDOI
Physics and Regimes of Supersonic Combustion
Antonella Ingenito,Claudio Bruno +1 more
TL;DR: In this article, a theoretical analysis of the physical mechanisms driving mixing and combustion in supersonic airstreams is presented, where they are found to be different from those in the incompressible regime.
Journal ArticleDOI
Review of combustion stabilization for hypersonic airbreathing propulsion
TL;DR: A review of fundamental research in combustion stabilization for hypersonic airbreathing propulsion is presented in this paper, which outlines both experimental and numerical research progress made towards combustion stabilization over the entire hypheratic regime, and intended to lay the groundwork for further studies which can provide optimized design guidelines for the next generation of high-speed air-to-air propulsion systems.
Journal ArticleDOI
In-Stream Hypermixer Fueling Pylons in Supersonic Flow
TL;DR: In this paper, the authors present results from both computational fluid dynamic and wind-tunnel experiments of in-stream fueling pylons injecting air, ethylene, and methane gas into Mach number 2.0 cold airflow.
Proceedings ArticleDOI
Experimental Study of Strut Injectors in a Supersonic Combustor Using OH-PLIF
TL;DR: In this article, an experimental study was carried out in the framework of ONERA-JAXA cooperation, dealing with the ignition and hydrogen flame development in a supersonic air flow at Mach 2.5, with stagnation conditions of 0.6 MPa and 1620 K.
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