An optical method is developed for determining the sooting limit in premixed burner-stabilized stagnation flame.The impact of a stagnant plate at varying heights above burner(HAB)on the sooting limit is investigated u...An optical method is developed for determining the sooting limit in premixed burner-stabilized stagnation flame.The impact of a stagnant plate at varying heights above burner(HAB)on the sooting limit is investigated using the method.The method quantifies the soot generation by processing pixel values in the region of interest of flame images.In a series of consecutive conditions from soot-free flame to soot-rich flame,the sooting limit is identified by observing the occurrence of soot formation.Experimental results demonstrate that this method could effectively capture the sooting limit.A comparison of the sooting limit at different HABs reveals that when the HAB is lower than 10 mm,the stagnant plate has an inhibitory effect on soot generation,and the equivalence ratio required for the sooting limit increases as the HAB decreases.When the HAB is higher than 10mm,the stagnant plate ceases to impact the sooting limit.展开更多
基金supported by the National Natural Science Foundation of China(No.52076110,No.52376115,and No.52106160)the Fundamental Research Funds for the Central Universities(No.30924010924)。
文摘An optical method is developed for determining the sooting limit in premixed burner-stabilized stagnation flame.The impact of a stagnant plate at varying heights above burner(HAB)on the sooting limit is investigated using the method.The method quantifies the soot generation by processing pixel values in the region of interest of flame images.In a series of consecutive conditions from soot-free flame to soot-rich flame,the sooting limit is identified by observing the occurrence of soot formation.Experimental results demonstrate that this method could effectively capture the sooting limit.A comparison of the sooting limit at different HABs reveals that when the HAB is lower than 10 mm,the stagnant plate has an inhibitory effect on soot generation,and the equivalence ratio required for the sooting limit increases as the HAB decreases.When the HAB is higher than 10mm,the stagnant plate ceases to impact the sooting limit.
