Abstract:Using high-hydrogen fuels in industrial gas turbines is an effective way to achieve near-zero carbon emission power generation. Lean premixed combustion can effectively reduce NOx emission. However, due to the strong flashback and auto-ignition tendencies during fuel-air mixing, it is a challenge to use lean premix combustion mode of high hydrogen fuels under gas turbine operation conditions.
An innovative conceptual design of arrayed-vanes premixer was proposed to achieve safe and uniform mixin… Show more
“…To study the syngas flame in a swirl burner on the basis of different reaction mechanisms, this study used a baseline case with a steady inflow and experimental data for simulation validation. A new swirl burner designed by (Wang et al, 2016;Yu et al, 2013) was used to study the combustion characteristics. The burner called arrayed-vanes combustor is composed of an arrayed-vanes premixer and a chamber.…”
Section: Experimental Devicementioning
confidence: 99%
“…The arrayed-vanes combustor was experimentally studied by Yu et al (2013). In the experiment, the arrayed-vanes premixer was assembled on a cylindrical chamber made of quartz glass, which facilitated the optical measurement.…”
This study numerically investigates the combustion characteristics in a swirl burner for CO-H 2 syngas by large eddy simulation. Firstly, experimental data are used to verify the applicability of the Boivin mechanism and the Sandia mechanism. The simulation results show that the Boivin mechanism predicts a more reasonable flame structure. Then, Syngas25, Syngas45, and Syngas100 (composed of 25%, 45%, and 100% H 2 by volume, respectively) are set to numerically investigate the effect of hydrogen addition ratio on combustion characteristics by using the dynamic Smagorinsky model and the partially stirred reactor model. The detailed simulation data shows that the addition of hydrogen greatly influences the flame structure and flow field; with an increase in hydrogen addition, the flame length shortens, the temperature rises, and flashback caused by combustion induced vortex breakdown occurs. Furthermore, the precessing vortex core cannot exist stably in Syngas100, though it can be clearly observed in other cases.
“…To study the syngas flame in a swirl burner on the basis of different reaction mechanisms, this study used a baseline case with a steady inflow and experimental data for simulation validation. A new swirl burner designed by (Wang et al, 2016;Yu et al, 2013) was used to study the combustion characteristics. The burner called arrayed-vanes combustor is composed of an arrayed-vanes premixer and a chamber.…”
Section: Experimental Devicementioning
confidence: 99%
“…The arrayed-vanes combustor was experimentally studied by Yu et al (2013). In the experiment, the arrayed-vanes premixer was assembled on a cylindrical chamber made of quartz glass, which facilitated the optical measurement.…”
This study numerically investigates the combustion characteristics in a swirl burner for CO-H 2 syngas by large eddy simulation. Firstly, experimental data are used to verify the applicability of the Boivin mechanism and the Sandia mechanism. The simulation results show that the Boivin mechanism predicts a more reasonable flame structure. Then, Syngas25, Syngas45, and Syngas100 (composed of 25%, 45%, and 100% H 2 by volume, respectively) are set to numerically investigate the effect of hydrogen addition ratio on combustion characteristics by using the dynamic Smagorinsky model and the partially stirred reactor model. The detailed simulation data shows that the addition of hydrogen greatly influences the flame structure and flow field; with an increase in hydrogen addition, the flame length shortens, the temperature rises, and flashback caused by combustion induced vortex breakdown occurs. Furthermore, the precessing vortex core cannot exist stably in Syngas100, though it can be clearly observed in other cases.
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