Abstract：To explore the key influence factors and influence rules of flow field conditions on the liquid-fuel spray impinging combustion process and discuss the enhancement mechanism of flow field conditions on spray impinging combustion process, the numerical simulation method was used to investigate the spray combustion by impinging streams for the coaxial opposed double-nozzle. The results show that the double-nozzle impinging stream has obvious strengthening effect on the combustion under the same fuel mass flow rate. As the inlet velocity is increased, the fuel evaporation and reaction rates are increased with increased combustion temperature. There is an optimum spacing between the two nozzles to obtain the best combustion results. As the nozzle spacing is increased or decreased, the combustion reaction is weakened. When the nozzle angle is 180°, the best combustion effect can be obtained. As the angle between the nozzles is decreased, the evaporation rate is increased, and the combustion reaction is hindered.
杜敏, 卢麒丞, 宋亮, 黄彬, 罗明, 王助良. 撞击流对喷雾燃烧强化机理的数值模拟[J]. 江苏大学学报（自然科学版）, 2019, 40(6): 621-628.
DU Min, LU Qicheng, SONG Liang, HUANG Bin, LUO Ming, WANG Zhuliang. #br#
Numerical simulation of enhancement mechanism of spray combustion by impinging streams[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2019, 40(6): 621-628.
ELPERIN I T. Heat and mass transfer in opposing currents［J］. Journal of Engineering Physics, 1961, 6(6): 62-68.
［2］
伍沅. 撞击流:原理?性质?应用［M］. 北京: 化学工业出版社, 2006.
［3］
SUN W, WON S H, OMBRELLO T, et al. Direct ignition and S-curve transition by in situ nano-second pulsed discharge in methane／oxygen／helium counterflow flame［J］. Proceedings of the Combustion Institute, 2013, 34(1):847-855.
［4］
CIANI A, KREUTNER W, HUBSCHMID W, et al. Experimental investigation of the morphology and stability of diffusion and edge flames in an opposed jet burner［J］. Combustion ＆ Flame, 2007, 150(3):188-200.
［5］
SASONGKO M N, MIKAMI M, DVORJETSKI A. Extinction condition of counterflow diffusion flame with polydisperse water sprays［J］. Proceedings of the Combustion Institute, 2011, 33(2):2555-2562.
［6］
WATANABE H， KUROSE R, HWANG S M, et al. Characteristics of flamelets in spray flames formed in a laminar counterflow［J］. Combustion ＆ Flame, 2007, 148(4):234-248.
［7］
WANG C G, DEAN A M, ZHU H Y, et al. The effects of multicomponent fuel droplet evaporation on the kine-tics of strained opposed-flow diffusion flames［J］. Combustion ＆ Flame, 2013, 160(2):265-275.
［8］
BASTOS-NETTO D. Modelling of evaporation and combustion processes in a spray formed by impinging jets［C］∥29th Joint Propulsion Conference and Exhibit. Monterey,USA：［s.n.］,1993:AIAA-93-2192.
［9］
CHOI H H, SOHN C H. A numerical study on combustion-stability rating of impinging-jet injectors using hot-fire simulation［J］. Journal of the Korean Society of Propulsion Engineers, 2010, 14(5): 24-31.
GUAN Q L, LIU Z, ZHANG J S, et al. Comparison study of turbulence models in numerical simulation of multi-jets impinging injectors［J］. Chemical Enginee-ring, 2017, 45(1):40-44. (in Chinese)
WU G P, GONG J, DU M, et al. Subsequent development of droplet collision in impinging stream［J］. Journal of Jiangsu University (Natural Science Edition), 2016, 37(5):525-529,547. (in Chinese)
DU M,HUANG B,LU Q C, et al. Experiment on strengthening mechanisms of impinging streams on spray combustion［J］. Journal of Jiangsu University(Natural Science Edition), 2018，39(4):523-529. (in Chinese)
