Effect of the Air Flow on the Combustion Process and Preheating Effect of the Intake Manifold Burner

Zhishuang Li, Ziman Wang, Haoyang Mo and Han Wu
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Zhishuang Li: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Ziman Wang: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Haoyang Mo: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Han Wu: School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China

Energies, 2022, vol. 15, issue 9, 1-17

Abstract: Diesel engines show poor performance and high emissions under cold-start conditions. The intake manifold burner is an effective method to increase the intake air temperature and improve engine performance. In this paper, a visualization system was employed to investigate the combustion process of the intake manifold burner. The effects of diesel flow rate and airflow velocity on combustion performance were investigated. The combustion process of the intake manifold burner showed four stages: preparing stage A, rapid development stage B, steady-development stage C, and stable stage D. Flame stripping was found in stages C and D, presenting the instability of the combustion process. With the increase in air flow velocity from 1.4 m/s to 3.0 m/s, the flame stripping was enhanced, leading to the increasing combustion instability and regular flame penetration fluctuations. The average temperature rise and combustion efficiency increased with the increasing diesel flow rate, indicating the combustion enhancement. Comparison of temperature rise and combustion efficiency under 2.0 m/s and 10.0 m/s showed that stronger cross wind enhances the heat convection, improving the temperature uniformity and combustion efficiency.

Keywords: intake manifold burner; flame; instability; preheat; diesel engine; cold-start (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
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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