An Experimental Investigation on the NO and CO Emission Characteristics of a Swirl Convergent-Divergent Nozzle at Elevated Pressure
作者： Zhongya Xi , Zhongguang Fu , Xiaotian Hu , Syed Waqas Sabir , Yibo Jiang
DOI: 10.3390/EN11061410
关键词:
摘要: The behavior of the pollutants NO and CO at elevated combustor pressure are special importance due to continuing trend toward developing engines operating higher ratios yield thermal efficiency. An experiment was performed examine emissions for a swirl convergent-divergent nozzle pressure. correlations were obtained. Meanwhile, flame length, exhaust gas oxygen concentration, exit temperature global residence time also determined analyze emission characteristics. results showed that, with increase in P, length decreased proportionally P−0.49; O2 volume fraction increased reduced. P−0.43. As increased, Emission Index (EINO) levels P−0.53 P−0.6 respectively, which is mainly attributed influence time; EINO almost time. scaling (ρue/d) proportional Fr0.42, indicated that compared pure fuel, fuel diluted primary air can cause decrease exponent Fr power function. At pressure, (EICO) P−0.35 P−0.4, unburned methane high accelerated chemical reaction kinetics promote conversion CO2.
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