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ISSN Печать: 1044-5110
ISSN Онлайн: 1936-2684
Indexed in
EXPERIMENTAL STUDY OF CONICAL DIESEL NOZZLE ORIFICE GEOMETRY
Краткое описание
In this experimental study, two conical and one cylindrical diesel injector nozzle orifice geometries were compared to each other. Contrary to earlier studies, the outlet diameter of the conical orifice was constant in all nozzles The main objective of the present study was to examine the effects of conical nozzle orifice geometry on fundamental spray characteristics when the outlet diameter is constant and independent of conicality. The spray tip penetration, spray angle, and mass flow rate were investigated, analyzed, and compared to different nozzle orifice geometries. The literature review shows that while the influence of conical nozzle orifice geometry on spray characteristics has been examined in several studies, some contradictions could be identified from these studies. This suggests that the topic is not comprehensively understood. Experimental fuel spray measurements were performed with a laser based backlight imaging system in a pressurized injection test chamber at room temperature. The density of ambient gas was 36 kg/m3, which corresponds to the density in real diesel engine conditions at the end of a compression stroke. A clear difference was not found when non-evaporative spray tip penetration was compared to different conical and cylindrical nozzle orifice geometries. This is inconsistent with earlier studies where spray tip penetration was studied. The spray angle was narrower with conical, rather than cylindrical, nozzle orifice geometry and the mass flow rate was notably higher with conical nozzle orifice geometry, which is consistent with earlier studies.
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Tang Chenglong, Feng Zehao, Zhan Cheng, Ma Wen'an, Huang Zuohua, Experimental study on the effect of injector nozzle K factor on the spray characteristics in a constant volume chamber: Near nozzle spray initiation, the macroscopic and the droplet statistics, Fuel, 202, 2017. Crossref
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Tahmasebi Ehsanallah, Lucchini Tommaso, D’Errico Gianluca, Onorati Angelo, Hardy Gilles, An investigation of the validity of a homogeneous equilibrium model for different diesel injector nozzles and flow conditions, Energy Conversion and Management, 154, 2017. Crossref
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Payri Raul, De la Morena Joaquin, Pagano Vincenzo, Hussain Ali, Sammut Gilbert, Smith Les, One-dimensional modeling of the interaction between close-coupled injection events for a ballistic solenoid injector, International Journal of Engine Research, 20, 4, 2019. Crossref
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Payri Raul, Hardy Gilles, Gimeno Jaime, Bautista Abian, Analysis of counterbore effect in five diesel common rail injectors, Experimental Thermal and Fluid Science, 107, 2019. Crossref
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Wu Shengqi, Gandhi Anand, Li Hongjiang, Meinhart Mark, Experimental and numerical study of the effects of nozzle taper angle on spray characteristics of GDI multi-hole injectors at cold condition, Fuel, 275, 2020. Crossref
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Ni Peiyong, Xu Haiyan, Zhang Ziheng, Zhang Xuewen, Effect of injector nozzle parameters on fuel consumption and soot emission of two-cylinder diesel engine for vehicle, Case Studies in Thermal Engineering, 34, 2022. Crossref
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Li Feng, Wang Ziman, Lee Chia-fon, Yang Wei, Ma Fukang, Visualization and simulation study on the impacts of conical duct geometry on the spray characteristics of ducted fuel injection, International Journal of Engine Research, 2022. Crossref
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Payri R., Salvador F.J., De la Morena J., Pagano V., Using a one-dimensional spray model to improve liquid length and ignition delay estimations for diesel flames, Applied Thermal Engineering, 124, 2017. Crossref