Experimental Study of Air-assisted Spray Characteristics of Aviation Kerosene Piston Engine

doi:10.3969/j.issn.1000-1093.2019.05.004

Abstract

Abstract: Based on the air-assisted spray characteristics of two-stroke aviation kerosene piston engine, the systemic experimental study was performed, and the effects of ambient pressure, temperature and control parameters，including fuel injection duration, interval among fuel and air, and air injection duration, on spray width, penetration, spatial diffusion area and Souter mean diameter were analyzed using a high-speed camera and a phase Doppler particle analyzer combining with image processing technology in order to obtain a desired gas mixture and ensure a good match between the spray characteristics and the time-varying environment of cylinder. The results show that the increased ambient pressure is not conducive to the spray spatial diffusion, while the atomization is worsen; and the increased ambient temperature is beneficial to the evaporation and breakup of fuel droplets in the case of constant control parameters; and the decreased or increased air injection duration facilitates the extension of spray along the direction of the nozzle, and promotes the expansion and breakup of droplets. The experimental results show that the air-assisted injection system has good adaptability. Key

Key words: aviationkerosene, pistonengine, air-assistedinjectionsystem, spaycharacteristic, phaseDopplerparticleanalyzer, Soutermeandiameter

CLC Number:

TK46⁺1

GAO Hongli, ZHANG Fujun, WANG Sufei, WU Hao, ZHOU Lei, ZHAO Zhenfeng, LIU Bolan. Experimental Study of Air-assisted Spray Characteristics of Aviation Kerosene Piston Engine[J]. Acta Armamentarii, 2019, 40(5): 927-937.

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第40卷第5期
2019 年5月兵工学报ACTA
ARMAMENTARIIVol.40No.5May2019

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