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Analysis of the structure of the atomized fuel spray with marine diesel engine injector in the early stage of injection
1
Institute of Naval Architecture and Ocean Engineering, Gdansk University of Technology, Poland
2
Institute of Heat Engineering, Warsaw University of Technology, Poland
Submission date: 2023-05-31
Final revision date: 2023-06-15
Acceptance date: 2023-06-15
Online publication date: 2023-07-18
Publication date: 2023-11-11
Corresponding author
Joanna Grochowalska
Institute of Naval Architecture and Ocean Engineering, Gdansk University of Technology, Gdansk, Poland
Institute of Naval Architecture and Ocean Engineering, Gdansk University of Technology, Gdansk, Poland
Combustion Engines 2023,195(4), 97-103
KEYWORDS
spray tip penetrationspray cone anglemarine diesel enginemarine diesel engine injectorearly stage of injection
TOPICS
ABSTRACT
This paper presents the results of the experimental research of the atomized fuel spray with the marine diesel engine injector in the constant volume chamber. The specificity of the phenomena occurring in the marine engine cylinder was the reason to use the optical visualisation method in the studies – the Mie scattering technique. This work presents an analysis of the influence of different geometry of outlet orifice and opening pressures of marine diesel injector on the macrostructure of the fuel spray. In the results, it was observed that the increased L/D ratio of the outlet orifice of the injector caused: an increase in the spray cone angle and a decrease in the spray tip penetration in the early stage of injection. Furthermore, it was defined that the characteristic of spray tip penetration over time was power, whereas the spray cone angle over time was a logarithmic function.
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