Analysis the effect of advanced injection strategies on engine performance and pollutant emissions in a heavy duty DI-diesel engine by CFD modeling

Mobasheri, Raouf; Peng, Zhijun; Mirsalim, S.M.

doi:10.1016/j.ijheatfluidflow.2011.10.004

Cited by 88 publications

(57 citation statements)

References 24 publications

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“…The statistical study is concluded analyzing the LOL measurements using Equation (2). It is summarized in Table 4.…”

Section: Discussionmentioning

confidence: 99%

“…Air-fuel mixing, evaporation and combustion processes control is the key to reduce pollutants and improve the efficiency of direct injection Diesel engines [1], [2]. Since decades, engine researchers have been trying to understand the basis of these processes from different points of view: theoretical, experimental and computational.…”

Section: Introductionmentioning

confidence: 99%

“…Since decades, engine researchers have been trying to understand the basis of these processes from different points of view: theoretical, experimental and computational. Computational tools, such as computational fluid dynamics (CFD) simulations, have proved their great potential [2], [3] and are growing and improving every day as proved by the use of new and models able to provide more detailed data such Deatached Eddy Simulation [4] or Large Eddy Simulation [5]. Still, these models are not completely predictive and experimental data are necessary at least for validation, but also to correctly define the boundary conditions of the problem.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental characterization of diesel ignition and lift-off length using a single-hole ECN injector

Benajes

Payri

Bardi

et al. 2013

Applied Thermal Engineering

150

126

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“…The statistical study is concluded analyzing the LOL measurements using Equation (2). It is summarized in Table 4.…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental characterization of diesel ignition and lift-off length using a single-hole ECN injector

Benajes

Payri

Bardi

et al. 2013

Applied Thermal Engineering

150

126

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“…In most of such works, analysis is mainly based upon the effect of heat release on spray tip penetration by comparing the spray behavior when injected into an inert (O2=0%) or a reacting (O2 >0%) atmosphere. Following a similar approach, the main goals of the present study are 1) to highlight the modification in the spray shape observed at reacting conditions 2) to investigate the mechanism behind these observations and 3) to provide quantitative data to the modelers that approach this problem.…”

Section: Introductionmentioning

confidence: 99%

“…Fuel-air mixing plays a significant role in combustion and emission process in diesel engine, which can be controlled by different injection parameters [1], injection strategies [2], advanced combustion modes [3] or fuel blending [4]. The complexity of the phenomena characterizing this process brought a significant challenge to the research community boosting the investigations in this field: experimental and computational tools have been significantly developed along the last decade and important goals have been achieved.…”

Section: Introductionmentioning

confidence: 99%

A study on diesel spray tip penetration and radial expansion under reacting conditions

Payri

García-Oliver

Xuan

et al. 2015

Applied Thermal Engineering

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The shape of Diesel spray was investigated at real engine conditions in a constant pressure combustion chamber. Schlieren imaging technique was used to make quantitative measurements of spray tip penetration and radial width stressing the impact that the fuel combustion and heat release have on the spray shape. The heat-release region and the Lift-off length were identified measuring OH* chemiluminescence. The fuel (n-dodecane) as well as the operating conditions and the injector used (single axially oriented hole, 89 µm-diameter) were chosen following the indications by the Engine Combustion Network. The effects of different operating parameters on the axial and radial expansion were also investigated. According to the results the reacting spray can be divided into three parts: an inert part a transient part and a quasi-steady part that lays between the previous regions. A new method for evaluating this radial expansion of reacting spray was developed and the parameter was evaluated under the different operating conditions. The results show that the radial expansion increases with increasing injection pressure and decreasing ambient temperature and ambient density. The oxygen concentration has no obvious effect on the radial expansion. AbstractThe shape of Diesel spray was investigated at real engine conditions in a constant pressure combustion chamber. Schlieren imaging technique was used to make quantitative measurements of spray tip penetration and radial width stressing the impact that the fuel combustion and heat release have on the spray shape. The heat-release region and the Lift-off length were identified measuring OH* chemiluminescence. The fuel (n-dodecane) as well as the operating conditions and the injector used (single axially-oriented hole, 89 µm-diameter) were chosen following the guidelines of the Engine Combustion Network. The effects of different operating parameters on the axial and radial expansion were also investigated. According to the results the reacting spray can be divided into three parts: an inert part, a transient one, and a quasi-steady one that lays between the two other regions. A new method for evaluating this radial expansion of reacting spray was developed, which was evaluated under the different operating conditions. Results show that the radial expansion increases with increasing injection pressure and decreasing ambient temperature and ambient density. The oxygen concentration has no obvious effect on the radial expansion.Keywords: tip penetration; radial expansion; reacting spray; Schlieren imaging Highlights:Spatial evolution of the reacting spray can be divided into three parts.The radial contour of the reacting spray is the result of shifting the inert one by an approximately constant value The radial expansion increases with higher injection pressure and lower ambient gas temperature.The radius expansion decreases with higher ambient gas density.Oxygen concentration has no significant effect on the radial expansion.

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Parametric optimization of direct injection CI engine to improve combustion characteristics

Ganji¹,

Kattela

Vysyaraju

et al. 2020

Env Prog and Sustain Energy

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To achieve emission standard norms and higher fuel efficiency conversion are the main concerns in diesel engines. The single parametric study approach might not attain the optimal combustion characteristics. In order to overcome this issue, multi objective study has been carried out to achieve the higher performance and simultaneously reduction of emissions. The main objective of present article is identifying the optimum set of the engine parameters for diesel fuel, which gives better performance and emissions. Numerical analysis was carried out by using CONVERGE CFD software. Numerical analysis were carried out by varying the Compression Ratio (CR) (12–16.5), Start of Injection (SOI) (0–25° bTDC), Fuel Injection Pressure (FIP) (500–1,400), and Exhaust Gas Recirculation (EGR) (0–40%). Response surface methodology was used for optimization. The parameters are optimized for minimizing the NOx, soot, and ISFC by using the Response Surface Methodology (RSM). Regression equations were developed for the responses such as ISFC, NOx, and soot. It was observed that the interaction effects also play a major role in determining the performance and emission characteristics of the engine. The optimum combination of operating parameters was found to be CR 14.55, SOI 16.29° bTDC, FIP 855 bar, and EGR 26.15% with a composite desirability of 0.94. The corresponding NOx and soot emissions are reduced by 40.3% and 52.38%, respectively, and a marginal reduction in the ISFC is accomplished. Mixture homogeneity (TFDI) was improved 27% for optimum case compared to baseline configuration.

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Analysis the effect of advanced injection strategies on engine performance and pollutant emissions in a heavy duty DI-diesel engine by CFD modeling

Cited by 88 publications

References 24 publications

Experimental characterization of diesel ignition and lift-off length using a single-hole ECN injector

Experimental characterization of diesel ignition and lift-off length using a single-hole ECN injector

A study on diesel spray tip penetration and radial expansion under reacting conditions

Parametric optimization of direct injection CI engine to improve combustion characteristics

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