Numerical study of the mixture formation process in a four-stroke GDI engine for two-wheel applications

Costa, Michela; Sorge, Ugo; Allocca, Luigi

doi:10.1016/j.simpat.2010.07.006

Cited by 29 publications

(10 citation statements)

References 9 publications

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“…Also, Eqs. (3) and (4) show the standard deviation ( s ) in terms of injection pressure ( inj P ) and log-normal distribution function, respectively (Costa et al, 2011).…”

Section: Spray Simulation Methodology and Resultsmentioning

confidence: 99%

“…To find the appropriate values to be employed in simulation of the injection, a 6-hole bosch HDEV 5.1 with 0.193 mm inner diameter is selected. The numerical simulation results are validated against the experimental findings reported by istituto motori-CNR for two different amounts of injected fuels at three different injection pressures (Costa et al, 2011). The amount of fuel injected and the injection pressure for each case is brought in Table 1.…”

Section: Experimental Setup and Datamentioning

confidence: 85%

See 1 more Smart Citation

Numerical Study on the Effects of Fuel Injection Characteristics on the Performance of a Lean Burn SG-GDI Engine towards High Efficiency and Emissions Reduction

Sarmast

Ziabasharhagh

Salavati-Zadeh

et al. 2019

JAFM

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The effects of spark and injection characteristics as well as split injection on the performance and emissions of a spray-guided gasoline direct injection (SG-GDI) engine operating close to stoichiometric conditions are assessed. To accomplish this, a 6-holes injector is simulated and the results are validated against available experimental data for spray penetration length. In addition, an open-cycle multi-dimensional model is developed for a port fuel injection (PFI) engine and the model outcomes are verified against in-cylinder pressure profile and normalized heat release rate. The GDI engine model is yielded under the light of embedment of the above-mentioned models. The model is then employed for investigation of the effects of injector angle, injection pressure, start of first and second injections and two-stage fuel injection with different fuel mass ratios at first and second injections, i.e., split injection, on mixture formation, combustion and engine emissions. The results show the pivotal role of the injector angle on formation of the mixture and output power. On the other hand, it is indicated that while practicing the split injection strategy, the flammability of the relatively stratified lean mixture with fuel to air equivalence ratio of 1.15 around the spark plug, surpasses that of stratified mixture.

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“…Also, Eqs. (3) and (4) show the standard deviation ( s ) in terms of injection pressure ( inj P ) and log-normal distribution function, respectively (Costa et al, 2011).…”

Section: Spray Simulation Methodology and Resultsmentioning

confidence: 99%

Section: Experimental Setup and Datamentioning

confidence: 85%

Numerical Study on the Effects of Fuel Injection Characteristics on the Performance of a Lean Burn SG-GDI Engine towards High Efficiency and Emissions Reduction

Sarmast

Ziabasharhagh

Salavati-Zadeh

et al. 2019

JAFM

View full text Add to dashboard Cite

show abstract

“…In this study, a Discrete Phase Model (DPM) based on the Euler-Lagrangian method is employed, where the gas phase is treated as a continuum, while the continuous liquid is artificially divided into discrete Lagrangian parcels. Each computational parcel represents a group of physically similar droplets that exchange mass, momentum, and energy with the surrounding air through source terms in the gas phase equations [24]. In order to improve the accuracy of the calculation of the formation of wall film, the spray-wall interaction model and the wall film evaporation model are enhanced in this study.…”

Section: Physical and Mathematical Modelmentioning

confidence: 99%

Three-dimensional numerical investigation on wall film formation and evaporation in port fuel injection engines

Liu

Yan

Jia

et al. 2016

Numerical Heat Transfer, Part A: Applications

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Wall film formation and evaporation were studied on a flat wall inside a constant-volume vessel using a three-dimensional numerical method. The computation was based on the discrete phase model (DPM) of spray dispersion, a spray-wall interaction model coupled with an enhanced wall film evaporation sub-model, in which the operating conditions of cold wall are considered for port fuel injection (PFI) engines. The influence of impacting parameters including injection pressure, the impingement distance from the injector and the impinged wall, injection duration, impingement angle, and wall temperature was discussed. ARTICLE HISTORY

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“…Hollow cone, single-hole full cone and multi-hole injectors are used for spray guided, air guided or wall guided strategies (Costa, Iorio et al 2009). In spray guided strategy, injector is located close to the spark plug and fuel spray is injected directly toward the spark plug (Costa, Sorge et al 2011). In the air guided strategy, fuel is injected in the moving air toward the spark plug.…”

Section: Introductionmentioning

confidence: 99%

“…In the wall guided strategy, fuel spray is injected directly toward the piston head. The piston head with specific geometry deflects the fuel spray toward the spark plug (Costa, Sorge et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Large Eddy Simulation of GDI Single-hole and Multi-hole Injector Sprays with Comparison of Numerical Break-up Models and Coefficients

zamani

Hosseini

Afshin

et al. 2016

JAFM

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In the present study the fuel spray of a gasoline direct injected engine with multi-hole injector is simulated. Simulation inputs data, injection flow rate and spray cone angle are obtained from previous experimental studies. Log-normal distribution with different standard deviation is used for initial droplet size as the primary break-up model in order to reach the agreement between experimental and calculated spray tip penetration.As the first step, only one plume of spray injected into a quiescent air environment is simulated and validated by varying break-up model and standard deviation. Then, with coefficient obtained from the single jet simulation all six spray jets are simulated based on the injector nozzles geometry. The comparison between single-jet simulation and multi-jet simulation shows that validated model coefficients for the single-jet spray cannot be used for multi-jet spray simulation without significant modifications due to adjacent jet interaction and pressure drag. A set of new coefficients for the multi-jet spray is presented

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Numerical study of the mixture formation process in a four-stroke GDI engine for two-wheel applications

Cited by 29 publications

References 9 publications

Numerical Study on the Effects of Fuel Injection Characteristics on the Performance of a Lean Burn SG-GDI Engine towards High Efficiency and Emissions Reduction

Numerical Study on the Effects of Fuel Injection Characteristics on the Performance of a Lean Burn SG-GDI Engine towards High Efficiency and Emissions Reduction

Three-dimensional numerical investigation on wall film formation and evaporation in port fuel injection engines

Large Eddy Simulation of GDI Single-hole and Multi-hole Injector Sprays with Comparison of Numerical Break-up Models and Coefficients

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