Effects of injection pressure on cavitation and spray in marine diesel engine

Yan, Fei; Du, Yuchen; Wang, Lihui; Tang, Wenxian; Zhang, Jian; Liu, Bo; Liu, Chenpeng

doi:10.1177/1756827716672472

Cited by 15 publications

(9 citation statements)

References 23 publications

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“…This is caused by the aerodynamic resistance in the constant volume chamber (secondary breakup). The influence of increasing backpressure on reducing the STP was shown in Grochowalska (2019), Payri et al (2017), Wang et al (2016) and Yan et al (2016) and are confirmed by the present results. On the basis of the analysis in Figure 5 and Grochowalska (2019), it may be concluded that an increase of backpressure generally causes a reduction of STP for big nozzles.…”

Section: Resultssupporting

confidence: 90%

“…The cavitation phenomenon is important to design the criterion of the fuel injection system and spray characteristics in marine diesel engines. Yan et al (2016) studied the effect of injection pressure on cavitation and sprayed in marine diesel engines. This study was used to simulate cavitation and spray two-phase flow model combined with single bubble dynamics and a droplet breakup model.…”

Section: Introductionmentioning

confidence: 99%

“…Yan et al (2016) studied the effect of injection pressure on cavitation and sprayed in marine diesel engines. This study was used to simulate cavitation and spray two-phase flow model combined with single bubble dynamics and a droplet breakup model.…”

Section: Introductionmentioning

confidence: 99%

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A new model of fuel spray shape at early stage of injection in a marine diesel engine

Grochowalska

Jaworski

Kapusta

et al. 2021

HFF

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Purpose In the cylinders of a marine diesel engine, self-ignition occurs in a very short time after the fuel injection into the combustion chamber. Therefore, this paper aims to develop a model of diesel fuel spray for the early stage of fuel spray in the marine diesel engine. The main technical aspects such as nozzle diameter of the marine engine injector and backpressure in the combustion chamber were taken into consideration. Design/methodology/approach In this paper, laboratory experimental studies were carried out to determine parameters of fuel spray in an early stage of injection in the marine diesel engine. The optical measuring Mie scattering technique was used to record the fuel injection process. The working space was a constant volume chamber. The backpressure parameters in the constant volume chamber were the same as during the operation of the marine diesel engine. Based on the experimental studies and important Hiroyasu and Arai models of fuel spray presented in literature was proposed new model of fuel spray parameters for marine diesel injectors. Findings In this paper, the proposed new model of the two main parameters described fuel spray evolution”: new model of spray tip penetration (STP) and spray cone angle (SCA). New model propagation of fuel STP in time was included the influence of nozzle diameter and backpressure. The proposed model has a lower error, about 15%–34%, than the model of Hiroyasu and Arai. Moreover, a new model of the evolution over time of the SCA is developed. Research limitations/implications In the future research of fuel spray process must be taken influence of the fuel temperature. Diesel fuel has a different density and viscosity in dependence of fuel temperature. Therefore are predicted of the expansion about influence of fuel temperature, new model of fuel spray for a marine diesel engine. The main limitations occurring in the research are not possible to carry out the research while real operation marine diesel engine. Originality/value An experimental test was carried out for a real fuel injector of a marine diesel engine. Design parameters and fuel injection parameters were selected on the basis of the actual one. In the literature, SCA is defined as a constant parameter for the specific preliminary data. A new model for the early stage of fuel spray of SCA propagation in time has been proposed. The early stage of fuel spray is especially important, because in this time comes in there to fuel self-ignition.

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

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A new model of fuel spray shape at early stage of injection in a marine diesel engine

Grochowalska

Jaworski

Kapusta

et al. 2021

HFF

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“…This is due to the larger nozzle in marine diesel engines which changes the outlet flow pattern in compared small general diesel engines. In marine diesel engines with relatively big fuel nozzles, the fuel spray is along the axis of nozzle while in diesel engines fuel is spray divergently [20].…”

Section: Spray Cone Anglementioning

confidence: 99%

Analysis of the macrostructure of the fuel spray atomized with marine engine injector

Grochowalska¹

2019

Combustion Engines

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One of the main problem influencing the combustion process in the cylinder of the marine engine is an fuel spray phenomena. The parameters describing the shape of the fuel spray are named macro parameters. This article presents the research results of the macrostructure parameters of the fuel spray atomized with the marine engine injector. The research were carried out by optical visualization measurement method of Mie scattering. The diameter of nozzle injector was 0.375 mm and L/D coefficient 8.3. In these research were considered different parameters of injection opening pressures and backpressures in the constant volume chamber. Generally conlusions are: the opening pressure influence on maximum spray tip penetration, spray cone angle and influence on speed of the injected fuel. The increase of backpressure into the constant volume chamber causes the reduction of spray tip penetration and the increase of the spray cone angle.

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“…2,3 However, in this context, a further increase in engine efficiency and keeping pollutant emission (mainly NOx and particles) under control is even more challenging. 4,5 Therefore, it is of major importance for engine design and calibration to have simulation tools available which combine good accuracy and limited computational effort so that a lot of options can be tested. In particular the modelling of the spray is critical.…”

Section: Introductionmentioning

confidence: 99%

Development of a wall jet model dedicated to 1D combustion modelling for CI engines

Osorio

Tauzia

Maiboom

2021

International Journal of Spray and Combustion Dynamics

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Diesel engines are becoming smaller as technology advances, which means that the fuel spray (or jet) interacts with the cylinder walls before combustion starts. Most fuel injection 1D models (especially for diesel fuel) do not consider this interaction. Therefore, a wall-jet sub-model was created on an Eulerian 1D diesel spray model. It was calibrated using data from the literature and validated with experimental data from a fuel spray impacting a plate in a constant volume combustion chamber. Results show that the spray moving along the wall has a higher mixing rate but less penetration as an equivalent free jet, therefore they show a similar volume. Spray-wall interaction creates a stagnation zone right before the impact with the wall, and friction of the jet with the wall is relatively low. All these phenomena are well captured by the wall-jet sub-model.

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Effects of injection pressure on cavitation and spray in marine diesel engine

Cited by 15 publications

References 23 publications

A new model of fuel spray shape at early stage of injection in a marine diesel engine

A new model of fuel spray shape at early stage of injection in a marine diesel engine

Analysis of the macrostructure of the fuel spray atomized with marine engine injector

Development of a wall jet model dedicated to 1D combustion modelling for CI engines

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