Investigation of Effect of Nozzle Numbers on Diesel Engine Performance Operated at Plateau Environment

Zhipeng Li, Qiang Zhang (), Fujun Zhang, Hongbo Liang and Yu Zhang
Additional contact information
Zhipeng Li: School of Mechanical Engineering, Beijing Institute of Technology, Zhongguancun Campus, Beijing 100072, China
Qiang Zhang: School of Mechanical Engineering, Beijing Institute of Technology, Zhongguancun Campus, Beijing 100072, China
Fujun Zhang: School of Mechanical Engineering, Beijing Institute of Technology, Zhongguancun Campus, Beijing 100072, China
Hongbo Liang: China North Engine Research Institute, Tianjin 300400, China
Yu Zhang: Department of Mechanical Engineering, Hangzhou City University, Hangzhou 310015, China

Sustainability, 2023, vol. 15, issue 11, 1-20

Abstract: The effect of nozzle number on the combustion and emission characteristics of diesel engines operating at high altitudes was investigated in this study. A three-dimensional computational fluid dynamics model was developed to simulate the spray spatial distribution, which is closely related to the nozzle number. The intake pressure was identified as the dominant factor under varying altitudes, while the fuel mass, injection timing and temperature were maintained constant. Altitudes of 3000 m were chosen to represent typical high-altitude conditions, and sea level cases were simulated for comparison. The results demonstrated that high-altitude operation reduced the air utility in the combustion chamber, leading to suppressed soot oxidization and worse soot emissions. Moreover, more injection nozzles will decrease the fuel injection pressure, resulting in inadequate fuel diffusion and detrimental effects on the combustion efficiency and soot control. However, too few nozzles may cause wall collisions and worsen the combustion conditions. The number of nozzles also influences the combustion, with a higher number of nozzles exacerbating poor combustion conditions. The optimal number of nozzles for the engine studied is determined to be six. Hence, determining the optimal nozzle number plays a vital role in achieving the optimal performance of highland diesel engines. This study provides valuable guidance for the development of diesel engines in high-altitude environments, where controlling the fuel consumption and soot emissions is challenging.

Keywords: diesel spray; combustion deterioration; numerical simulations; altitude effect; nozzles (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/15/11/8561/pdf (application/pdf)
https://www.mdpi.com/2071-1050/15/11/8561/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:15:y:2023:i:11:p:8561-:d:1155215

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().