Chapter 5: Review of Experiments on Ignition and Flameholding in Supersonic Flow
نویسنده
چکیده
5.1 ABSTRACT Supersonic combustion data obtained at the low static temperatures appropriate for an efficient scramjet engine are reviewed. Attention is directed at the methods by which the fuel was ignited and combustion maintained. The cited supersonic combustion experiments are grouped under the six headings: chemical intiators; non-uniform flows; turbulent flameholding; combustion induced compression; partial subsonic combustion and plasma sources. The paper is drawn from the NATO RTO AVT WG10 report on technologies for propelled hypersonic flight which aims to summarise the state of the art, identifying the key issues still hindering scramjet development.
منابع مشابه
Plasma-enhanced mixing and flameholding in supersonic flow.
The results of experimental study of plasma-based mixing, ignition and flameholding in a supersonic model combustor are presented in the paper. The model combustor has a length of 600 mm and cross section of 72 mm width and 60 mm height. The fuel is directly injected into supersonic airflow (Mach number M=2, static pressure P(st)=160-250 Torr) through wall orifices. Two series of tests are focu...
متن کاملIgnition and flameholding in a supersonic combustor by an electrical discharge combined with a fuel injector
The paper presents the results of an experimental study of supersonic combustor operation enhanced by an electrical discharge. A novel scheme of plasma assisted ignition and flameholding is demonstrated, which combines a wall fuel injector and a high-voltage electric discharge into a single module. The experimental combustor with the cross section of 72 mm (width) 60 mm (height) and length of...
متن کاملFlameholding in Non-premixed Supersonic Flows
1 Introduction A balance between the flame propagation speed and the fluid velocity must be maintained to maintain the flame in a chemically reacting flow. Since the fluid velocity exceeds the flame speed in supersonic combustion applications, the flameholding issue is solved by generation of some sort of recirculation region which ensures sufficient residence time so that the processes involve...
متن کاملUpstream Mixing Cavity Coupled with a Downstream Flameholding Cavity Behavior in Supersonic Flow (postprint)
متن کامل
Modelling of Suddenly Expanded Flow Process in Supersonic Mach Regime using Design of Experiments and Response Surface Methodology
The present work is an attempt to model, analyze, and control the flow at the base of an abruptly expanded circular duct by using design of experiments (DOE) and response surface methodology (RSM). Tiny-jets in the form of orifice were positioned at an interval of 900, 6.5 mm from the primary axis of the main jet of the nozzle. Experiments were conducted to measure two responses namely, base pr...
متن کامل