Published 12 issues per year
ISSN Print: 1044-5110
ISSN Online: 1936-2684
Indexed in
CFD Study of Needle Motion Influence on the Spray Conditions of Single-Hole Injectors
ABSTRACT
The spray characteristics and consequently the success of the diesel combustion process is strongly affected by the manner in which fuel is introduced in the combustion chamber. This work consists in studying the effect of needle motion of typical single-hole sac-type injectors on nozzle exit conditions. Three-dimensional moving mesh simulations have been carried out to calculate the injection process using cylindrical and conical nozzle geometries. The CFD analysis includes a study of the effect of cavitation on kinetic turbulent energy and velocity profiles. Results show that the flow within the nozzle and at the exit varies depending on the nozzle geometry and needle position. The model predicts clouds of cavitation that grow and exit the nozzle at low needle lifts. A kind of hysteresis in the development of the flow has also been observed between needle opening and closing. The existing correlation between turbulence and cavitation at the nozzle hole exit during the needle motion has been quantified.
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Hoyas Sergio, Gil Antonio, Margot Xandra, Khuong-Anh Dung, Ravet Frederic, Evaluation of the Eulerian–Lagrangian Spray Atomization (ELSA) model in spray simulations: 2D cases, Mathematical and Computer Modelling, 57, 7-8, 2013. Crossref
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Javier López J., Salvador F.J., de la Garza Oscar A., Arrègle Jean, A comprehensive study on the effect of cavitation on injection velocity in diesel nozzles, Energy Conversion and Management, 64, 2012. Crossref
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López J.J., Novella R., García A., Winklinger J.F., Investigation of the ignition and combustion processes of a dual-fuel spray under diesel-like conditions using computational fluid dynamics (CFD) modeling, Mathematical and Computer Modelling, 57, 7-8, 2013. Crossref
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Chouak Mohamed, Mousseau Alexandre, Reveillon Damien, Dufresne Louis, Seers Patrice, Study of Transient Effects in the Internal Flow of a Diesel Fuel Injector, SAE Technical Paper Series, 1, 2015. Crossref
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Montanaro Alessandro, Allocca Luigi, Impact of the Nozzle Coking on Spray Formation for Diesel Injectors, SAE Technical Paper Series, 1, 2013. Crossref
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Allocca Luigi, Vaglieco Bianca Maria, Montanaro Alessandro, Mancaruso Ezio, Ciaravino Claudio, Avolio Giovanni, Investigation of Diesel Injector Nozzle Flow Number Impact on Spray Formation and Combustion Evolution by Optical Diagnostics , SAE Technical Paper Series, 1, 2012. Crossref
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Papadopoulos Nikolaos, Aleiferis Pavlos, Numerical Modelling of the In-Nozzle Flow of a Diesel Injector with Moving Needle during and after the End of a Full Injection Event, SAE International Journal of Engines, 8, 5, 2015. Crossref
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Huang Weidi, Moon Seoksu, Ohsawa Katsuyuki, Near-nozzle dynamics of diesel spray under varied needle lifts and its prediction using analytical model, Fuel, 180, 2016. Crossref
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Dong PengBo, Nishida Keiya, Inaba Takuya, Ogata Youichi, Characterization of Internal Flow and Spray Behaviors of Hole-Type Nozzle under Tiny and Normal Injection Quantity Conditions for Diesel Engine, SAE International Journal of Fuels and Lubricants, 9, 1, 2016. Crossref
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Örley Felix, Hickel Stefan, Schmidt Steffen J, Adams Nikolaus A, Large-Eddy Simulation of turbulent, cavitating fuel flow inside a 9-hole Diesel injector including needle movement, International Journal of Engine Research, 18, 3, 2017. Crossref
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Maurya Rakesh Kumar, Additional Sensors for Combustion Analysis, in Reciprocating Engine Combustion Diagnostics, 2019. Crossref
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Chouak Mohamed, Dufresne Louis, Seers Patrice, Single Orifice Diesel Injector Flow Characterization and the Impact of Needle Lift Using Large Eddy Simulation and Proper Orthogonal Decomposition, Journal of Fluids Engineering, 141, 5, 2019. Crossref
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Lluesma-Rodríguez Federico, Álcantara-Ávila Francisco, Pérez-Quiles María Jezabel, Hoyas Sergio, A Code for Simulating Heat Transfer in Turbulent Channel Flow, Mathematics, 9, 7, 2021. Crossref
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Schwarz Philip, Blume Martin, Weiß Lukas, Wensing Michael, Skoda Romuald, 3D simulation of a ballistic direct injection cycle for the assessment of fuel property effects on cavitating injector internal flow dynamics and primary breakup, Fuel, 308, 2022. Crossref
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Chouak Mohamed, Dufresne Louis, Seers Patrice, Large eddy simulation of a double-injection cycle and the impact of the needle motion on the sac-volume flow characteristics of a single-orifice diesel injector, International Journal of Engine Research, 22, 8, 2021. Crossref
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Gao Ya, Huang Weidi, Pratama Raditya Hendra, Gong Huifeng, Wang Jin, Investigation of Needle Motion Profile Effect on Diesel Spray in Near-Nozzle Field, Micromachines, 13, 11, 2022. Crossref