Influence of injection scheme on flame characteristics in partially premixed combustion
Zhao Shilong,
Fan Yuxin,
Tiantai Deng and
Danny Crookes
Energy, 2020, vol. 205, issue C
Abstract:
A remodelled flame holding device was integrated with injection, which could meet the demand of compact design and better resisting thermal ablation. Simplified model was applied to simulate flow field using CFD and was well verified, and the deviation was within 3%. The optimized stabilizer with close-coupled injection was put forward, its fuel distribution and flame expansion were improved with the growth of velocity. And the greater turbulent intensity was beneficial for droplets breakup and fuel/air mixing. Additionally, the growth of temperature enlarged flame expansion due to its bigger reaction rates. To more specifically illustrate combustion characteristics, an enhanced image processing method through removing flame radiation was developed to detect real flame boundary. Quantitative analysis of flame expansion was investigated to reveal the working mechanism of integrated scheme. Moreover, the influences of injection locations including prepositive and postpositive injection on flame expansion were investigated and the prepositive injection achieve up to 10% larger flame expansion. Integrated scheme was extremely important for next generation of propulsion and power system.
Keywords: Injection scheme; Integrated stabilizer; Partial premixed combustion; Enhanced image processing method; Fuel distribution; Flame expansion (search for similar items in EconPapers)
Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:205:y:2020:i:c:s0360544220311658
DOI: 10.1016/j.energy.2020.118058
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