Effect of Particle Diameter on Primary Breakup of High-Pressure Diesel Spray Atomization: A Study Based on Numerical Simulations Using the Eulerian–Lagrangian Model

Yan Lei (), Xiaojie Liang, Dingwu Zhou, Tao Qiu, Kaixin Wang and Yue Wu
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Yan Lei: Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
Xiaojie Liang: Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
Dingwu Zhou: Department of Automotive Application, Hunan Automotive Engineering Vocational College, Zhuzhou 412001, China
Tao Qiu: Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China
Kaixin Wang: Beijing Aerospace Technology Institute, Beijing 100176, China
Yue Wu: Faculty of Environment and Life, Beijing University of Technology, Beijing 100124, China

Energies, 2022, vol. 16, issue 1, 1-24

Abstract: The coupling of Eulerian and Lagrangian methods in the Eulerian–Lagrangian Spray Atomization (ELSA) approach is critical. This study proposes an equation for the primary breakup particle diameter D of a diesel fuel spray and adopts it as a key transition criterion for coupling. A three-dimensional diesel spray is modeled by the large-eddy simulation (LES) approach. This improved ELSA simulation was conducted using various transition criteria for particle diameter D cr . The results show that fuel spray experiences two stages: stage I, when a liquid column appears without a dispersed phase, and stage II, when primary breakup occurs with many discrete particles. Although D cr has little influence on the macro-spray characteristics, such as top penetration distance S and spray cone angle θ , it has significant effects on discrete particles, such as their number, average diameter, distribution and location, and spray cone area. D cr should be determined on the basis of actual operating conditions.

Keywords: particle diameter; spray atomization; breakup model; ELSA; diesel (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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