Open AccessStudy on cyclic variation rate of fuel flow in the nozzle during fuel injection
Author(s) -
Wen Hua,
Xinyu Zhang,
Jiang Yu-long,
Zhao Ling-yao
Publication year - 2021
Publication title -
international journal of spray and combustion dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.614
H-Index - 16
eISSN - 1756-8285
pISSN - 1756-8277
DOI - 10.1177/17568277211055979
Subject(s) - nozzle , fuel injection , shadowgraphy , body orifice , mechanics , flow (mathematics) , materials science , diesel fuel , flow coefficient , volumetric flow rate , automotive engineering , mechanical engineering , thermodynamics , physics , optics , engineering , laser
The fuel flow pattern in the fuel injection nozzle of diesel engine is a complex and changeable phenomenon, which is easily affected by various factors, bringing the differences of flow patterns between multiple injection cycles. To solve the above problem, a visual experimental platform of fuel injection nozzle was built, in which the 100 injection cycles of diesel engine on the same working condition were photographed via shadowgraphy to study the difference in fuel flow pattern in the nozzle by ensemble average processing method. The cyclic variation rate K of fuel flow pattern is defined. Results demonstrate that the fuel flow pattern tends to be the same in multiple fuel injection cycles, but there is a strong randomness at the starting of injection and after ending of injection; the K can be reduced by decreasing the injection pressure and the inclination angle of orifice, so that the fuel flow pattern in the nozzle tends to be consistent.