Insights into Microscopic Characteristics of Gasoline and Ethanol Spray from a GDI Injector Under Injection Pressure up to 50 MPa

Xiang Li (), Xuewen Zhang, Tianya Zhang, Ce Ji, Peiyong Ni, Wanzhong Li (), Yiqiang Pei (), Zhijun Peng and Raouf Mobasheri
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Xiang Li: School of Mechanical Engineering, Nantong University, Nantong 226019, China
Xuewen Zhang: School of Mechanical Engineering, Nantong University, Nantong 226019, China
Tianya Zhang: School of Mechanical Engineering, Nantong University, Nantong 226019, China
Ce Ji: School of Mechanical Engineering, Nantong University, Nantong 226019, China
Peiyong Ni: School of Mechanical Engineering, Nantong University, Nantong 226019, China
Wanzhong Li: State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
Yiqiang Pei: State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
Zhijun Peng: School of Engineering, University of Lincoln, Lincoln LN6 7DQ, UK
Raouf Mobasheri: ICL, Junia, Université Catholique de Lille, LITL, F-59000 Lille, France

Sustainability, 2024, vol. 16, issue 21, 1-17

Abstract: Nowadays it has become particularly valuable to control the Particulate Matter (PM) emissions from the road transport sector, especially in vehicle powertrains with an Internal Combustion Engine (ICE). However, almost no publication has focused on a comparison of the microscopic characteristics of gasoline and ethanol spray under injection pressure conditions of more than 30 MPa, except in the impingement process. By using a Phase Doppler Particles Analyser (PDPA) system, the microscopic characteristics of gasoline and ethanol spray from a Gasoline Direct Injection (GDI) injector under injection pressure ( P I ) up to 50 MPa was fully explored in this research. The experimental results demonstrate that under the same P I , the second peak of the probability ( p d ) curves of droplet normal velocity for gasoline is slightly higher than that of ethanol. Moreover, gasoline spray exceeds ethanol by about 5.4% regarding the average droplet tangential velocity at 50 mm of jet downstream. Compared to ethanol, the p d curve’s peak of droplet diameter at (0, 50) for gasoline is 1.3 percentage points higher on average, and the overall Sauter mean diameter of gasoline spray is slightly smaller. By increasing P I from 10 MPa to 50 MPa, p d of the regions of “100 ≤ Weber number ( W e ) < 1000” and “ W e ≥ 1000” increases by about 23%, and the p d of large droplets over 20 μm shows a significant reduction. This research would provide novel insights into the deeper understanding of the comparison between gasoline and ethanol spray in microscopic characteristics under ultra-high P I . Additionally, this research would help provide a theoretical framework and practical strategies to reduce PM emissions from passenger vehicles, which would significantly contribute to the protection and sustainability of the environment.

Keywords: microscopic spray characteristics; high injection pressure; gasoline; ethanol; Gasoline Direct Injection (GDI) injector; Phase Doppler Particles Analyser (PDPA) (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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