Spray Modeling for Outwardly-Opening Hollow-Cone Injector

Sim, Jaeheon; Badra, Jihad; Elwardany, Ahmed; Im, Hong G.

doi:10.4271/2016-01-0844

Cited by 24 publications

(14 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For the modeling of spray dynamics, the Lagrangian discrete parcel method was used. As for the 109 spray break-up models, Sim et al [30] modified the Kelvin-Helmholtz-Rayleigh-Taylor (KH-110 RT) model [30] [30]for the Lagrangian spray parcels produced from the outwardly-opening 111 hollow-cone spray. The model was validated against constant volume spray [30] and engine data 112…”

mentioning

confidence: 99%

Numerical investigation of injector geometry effects on fuel stratification in a GCI engine

Atef

Badra

Jaasim

et al. 2018

Fuel

Self Cite

View full text Add to dashboard Cite

show abstract

mentioning

confidence: 99%

Numerical investigation of injector geometry effects on fuel stratification in a GCI engine

Atef

Badra

Jaasim

et al. 2018

Fuel

Self Cite

View full text Add to dashboard Cite

show abstract

“…Wang et al [17][18][19] and Bonatesta et al [20] calibrated the RD model to predict the gasoline spray and combustion process in wall-guided DI gasoline engines with the multi-hole injector. Sim et al [21] modeled the gasoline spray from an outward-opening piezoelectric injector with the modified KHRT breakup model, and the initial Sauter mean diameter (SMD) values were varied in order to validate against the measurements under different background conditions.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of the Gasoline Spray with an Outward-Opening Piezoelectric Injector: A Comparative Study of Different Breakup Models

Wang¹,

Zhao²

2018

SAE Technical Paper Series

View full text Add to dashboard Cite

The outward-opening piezoelectric injector can achieve stable fuel/air mixture distribution and multiple injections in a single cycle, having attracted great attentions in direct injection gasoline engines. In order to realise accurate predictions of the gasoline spray with the outwardopening piezoelectric injector, the computational fluid dynamic (CFD) simulations of the gasoline spray with different droplet breakup models were performed in the commercial CFD software STAR-CD and validated by the corresponding measurements. The injection pressure was fixed at 180 bar, while two different backpressures (1 and 10 bar) were used to evaluate the robustness of the breakup models. The effects of the mesh quality, simulation timestep, breakup model parameters were investigated to clarify the overall performance of different breakup model in modeling the gasoline sprays. It is found that the tuned Reitz-Diwakar (RD) model shows robust performance under different backpressures and the spray penetration shows good agreement with the experimental measurements. However, the modified Kelvin-Helmholtz (KH) Rayleigh-Taylor (RT) model could not achieve good agreements with fixed model parameters at different backpressures. The tuned KHRT model at 1 bar backpressure shows much faster breakup process at 10 bar backpressure, leading to abnormal spray patterns and fuel vapor distributions. As there is no further tuning requirement for different backpressures, the RD model is found to be better in modeling the gasoline sprays from the outward-opening piezoelectric injector.

show abstract

“…The k-ε turbulence model from the Reynolds-Averaged Navier-Stokes (RANS) based renormalization group (Realizable) has been used for calculations in numerous research studies in the literature. In addition, liquid parcels (droplet groups) are included in the gas phase calculation area and Lagrangian discrete parcel method is used for spray modeling (Sim et al, 2016).…”

Section: Spray Modelingmentioning

confidence: 99%

“…The actual velocity ( ) can be obtained by multiplying the theoretical velocity by the injector discharge rate. The discharge coefficient ( ) varies between 0.7 and 0.78 according to number of (Sim et al, 2016). In this study, the D C was taken as 0.75.…”

Section: Outwardly-opening Injectormentioning

confidence: 99%

See 1 more Smart Citation

Numerical Investigation of the Spray Characteristics in an Outwardly-Opening Piezoelectric Gasoline Injector for Different Ambient Conditions

Taş¹,

Karamangil²

2019

Uludağ University Journal of the Faculty of Engineering

View full text Add to dashboard Cite

In this study, the spray characteristics of an outwardly-opening injector have been investigated numerically. Numerical analyses are carried out by taking temperature and pressure statuses of the internal combustion engine in cold temperature operations into consideration. The effects of these parameters on the evaporation rate, penetration, spray morphology, angle of the fuel spray and the Sauter Mean Diameter were key issues to be addressed. N-heptane fuel was used and the Kelvin-Helmholtz / Rayleigh-Taylor breakup model was adopted. The analyses were performed in the comprehensive environment of Fluent software. It was observed that the results complied with experimental data taking part in literature. Consequences demonstrated that increasing the ambient pressure intensified vortex formation, decreased penetration and increased fuel cone angle by forming a more compact fuel bundle. In addition, it was ascertained that the effect of the temperature parameter on the evaporation was less effective than the pressure parameter.

show abstract

Spray Modeling for Outwardly-Opening Hollow-Cone Injector

Cited by 24 publications

References 17 publications

Numerical investigation of injector geometry effects on fuel stratification in a GCI engine

Numerical investigation of injector geometry effects on fuel stratification in a GCI engine

Numerical Simulation of the Gasoline Spray with an Outward-Opening Piezoelectric Injector: A Comparative Study of Different Breakup Models

Numerical Investigation of the Spray Characteristics in an Outwardly-Opening Piezoelectric Gasoline Injector for Different Ambient Conditions

Contact Info

Product

Resources

About