Investigations on the Diesel Spray Characteristic and Tip Penetration Model of Multi-Hole Injector with Micro-Hole under Ultra-High Injection Pressure

Chang Zhai, Feixiang Chang, Yu Jin and Hongliang Luo ()
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Chang Zhai: Renewable Energy Research Center, National Institute of Advanced Industrial Science and Technology (AIST), 1-2-1 Namiki, Tsukuba 305-8564, Ibaraki, Japan
Feixiang Chang: School of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China
Yu Jin: Institute for Energy Research, Jiangsu University, Zhenjiang 212013, China
Hongliang Luo: College of Power and Energy Engineering, Harbin Engineering University, Harbin 150001, China

Sustainability, 2023, vol. 15, issue 14, 1-17

Abstract: Increasing the injection pressure has a significant impact on atomization and combustion characteristics. Spray tip penetration serves as a vital parameter for fuel injection control and engine structure design. However, a reliable spray tip penetration model for ultra-high-pressure injection is currently lacking. To address this gap, this study establishes a theoretical 0-dimensional model for spray tip penetration under ultra-high pressure (300 MPa) conditions. The model is based on the conservation of momentum and phenomenological models. The new model divides spray tip penetration into two stages: Pre-breakup and post-breakup, with fuel injection rate and spray cone angle used as model inputs. To validate the model, high-speed camera observations and constant-volume chamber experiments are conducted to investigate the spray characteristics. The results indicate that the new spray tip penetration model demonstrates improved predictive accuracy across all experimental conditions.

Keywords: diesel fuel; spray penetration model; ultra-high injection pressure; 0-dimensional model (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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