The effects of cooling flow injection on the flow development and acoustic oscillation in a premixed swirl-stabilized combustor had been numerically investigated using 3D large-eddy simulation. Three different cases, including one with no injection and two with cooling flow injection (5, 20 m s), were simulated. With injection of cooling flow-through slits in the combustor wall, the absolute ve...

This paper reports a CFD modeling study to investigate the hydrogen-air mixture combustion in a micro scale chamber. Nine species with nineteen reversible reactions were considered in the premixed combustion model. The effect of operational and geometrical conditions including; combustor size, wall conductivity, reactant flow rates and hydrogen feed splitting on combustion stabilit...

The objective of this paper is to present recent research on the use of a Reynolds Stress Closure Model (RSCM) for a Lean Direct Injection (LDI) combustor with swirlers. This paper will provide comparisons between RSCM results, k-ε turbulence model results, and experimental data for chemically nonreactive swirling flows. The results show that, for high degree swirl flow, the RSCM can provide pr...

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Abstract In order to broaden the stable working range of air-breathing continuous rotating detonation engine and explore influence combustor configuration on propagation characteristics wave, cavity-based annular is introduced. Air-breathing experiments are conducted with non-premixed ethylene air. A tri-propellant air-heater used imitate outlet parameters intake Ma4/20km. The designed mass flo...

This study reports the first experiments of a large-scale hydrogen-fueled oblique detonation engine model conducted in hypersonic wind tunnel. The stabilization characteristic wave, specific combustion mode and corresponding flow structures are emphasized. Results show that by adjusting geometry combustor different tests, two stabilized modes relevant to theoretical branches at given wedge angl...

This report presents the results of a research program designed to examine the engineering and environmental acceptability of using municipal solid waste (MSW) combustor ash as an aggregate substitute in the manufacture of construction quality cement blocks. Approximately 350 tons of MSW combustor ash was combined with Portland cement to form standard hollow masonry blocks using conventional bl...

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...