The combustion efficiency of a diesel engine depends not only on spray characteristics but also on
fuel-air mixing characteristics. Based on the original spray model, a new spray model is established in this paper
to accurately predict the diesel spray, and then a multi-component evaporation model is added into it. The model
takes the influence of component concentration gradient and species on its evaporation rate in the liquid phase into
account. This paper studies the spray characteristics (spray penetration, spray angle and spray morphology) and
fuel-air mixing characteristics (spray area, spray volume and air entrainment mass) using the spray model, and the
results are compared with the experimental results. The comparison shows that the simulated spray penetration
and spray angle are close to the experimental results with the average deviations less than 3%. Moreover, this paper
studies the spray area, spray volume and air entrainment using empirical formula under different conditions. And
the maximum deviations of the spray volume, spray area and air entrainment mass are less than 5% as compared
with the test values. Overall, this spray model can predict the diesel spray characteristics and fuel-air mixing
characteristics under high injection pressure accurately.
WANG Xiaorong (王筱蓉), WANG Jigang (王继刚), JIN Zhangliang (金张良),REN Guilong (任贵龙), MA Hu (马虎)
. Multi-Component Model of Diesel Sprays Under High Injection Pressure[J]. Journal of Shanghai Jiaotong University(Science), 2018
, 23(2)
: 264
-268
.
DOI: 10.1007/s12204-017-1898-1
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