Multi-zone modeling of combustion and emissions formation in DI diesel engine operating on ethanol–diesel fuel blends

Rakopoulos, C.D.; Antonopoulos, K.A.; Rakopoulos, Dimitrios C.; Hountalas, D. T.

doi:10.1016/j.enconman.2007.07.035

Cited by 122 publications

(73 citation statements)

References 48 publications

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“…7 and 10), against the opposing effect of the lower cetane number (and thus longer ignition delay) of the ethanol leading possibly to higher temperatures during the premixed combustion part. This is a delicate balance weighting more on the one or the other side, depending on the specific engine and its operating conditions [21], which for example may be disclosed by the details of a successful multi-zone model [48]. Fig.…”

Section: Discussion Of the Performance And Exhaust Emissions Results mentioning

confidence: 99%

“…Recently, a detailed multi-zone combustion modeling with these ethanol-diesel blends has been submitted [48], along the lines of a recent paper by the first three authors [49] applied for the engine in hand when using vegetable oils or their derived bio-diesels, which has in turn expanded on a similar multi-zone one that has dealt only with the related physical processes [17].…”

Section: Article In Pressmentioning

confidence: 99%

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Experimental heat release analysis and emissions of a HSDI diesel engine fueled with ethanol–diesel fuel blends

Rakopoulos

Antonopoulos

Rakopoulos

2007

Energy

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281

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Section: Discussion Of the Performance And Exhaust Emissions Results mentioning

confidence: 99%

Section: Article In Pressmentioning

confidence: 99%

Experimental heat release analysis and emissions of a HSDI diesel engine fueled with ethanol–diesel fuel blends

Rakopoulos

Antonopoulos

Rakopoulos

2007

Energy

Self Cite

281

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“…Low temperature of the area is not conducive to the diesel combustion. In addition, due to less ethanol injection during the second stage, the heat release is small, thus making the temperature of the ω combustion chamber during the post-combustion stage lower (Figure 10d), and bringing slower diesel diffusion process and incomplete combustion [15]. …”

Section: Discussion and Analysismentioning

confidence: 99%

Analysis on Combustion Process of Ethanol - Diesel Direct Injection Engine with Two-stage Ethanol Injection Ignited by Diesel

Yu¹,

Zhou²,

Zhang³

et al. 2018

Proceedings of the 2017 4th International Conference on Machinery, Materials and Computer (MACMC 2017)

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Abstract. A set of GDI system was installed on a F188 single-cylinder, air-cooled and vertical direct injection diesel engine, which was used for ethanol injection, and the mechanical pump injection system of the original diesel engine was used for diesel injection. Ethanol and diesel account for half of the total size respectively, and the total heat energy of the fuel is equivalent to that of the original diesel engine under the same condition. A 3D combustion model is established for the ethanol -diesel direct injection engine. The ethanol injection is adopted with two-stage injection mode, with the first stage injection starting point at 240°CA and the second stage injection starting point the same as the diesel injection starting point, 344°CA. Four conditions featured by the same total two-stage ethanol injection and the first stage injection and second stage injection respectively accounting for 20% and 80% (B20L80), 40% and 60% (B40L60), 60% and 40% (B60L40) and 80% and 20% (B80L20) of the total injection are calculated and analyzed. After diesel burning, the mixed ethanol is ignited. The two-stage ethanol injection proportion is different, and ethanol premixing and diffusion combustion proportion in the cylinder is also different, thus affecting the combustion process. The result shows that, with regard to B60L40 and B40L60, cylinder combustion pressure and average temperature are higher, combustion speed is faster, combustion is more sufficient, and combustion process is better. B60L40 has the highest NO generation but the lowest soot generation, and B20L80 has the lowest NO generation but the highest soot generation.

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“…2). Earlier ethanol injection starting point will bring the more combustible mixed gas, the wider space distribution area, and the uniform concentration gradient [15]. Upon the diesel injection, the ethanol injection will be ended, the diesel evaporation and atomization will be slightly affected for proper mixing with the air, thus forming mixed gas and ignition.…”

Section: Figure 6 Soot Mass Concentration In the Cylindermentioning

confidence: 99%

Analysis on the Combustion Process of the Ethanol - Diesel Direct Injection Engine with Simultaneous Diesel and Ethanol Injection (with Ethanol Injection Starting Point Earlier than the Diesel Injection Starting Point)

Yu¹,

Zhou²,

Yao³

et al. 2018

Proceedings of the 2017 4th International Conference on Machinery, Materials and Computer (MACMC 2017)

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A set of GDI system for ethanol injection is installed on a F188 diesel engine, and the diesel supply system of the original diesel engine is used for diesel injection. The computational fluid dynamics software FIRE is adopted to establish a 3D combustion model of the ethanol -diesel direct injection engine. The total heat energy of the fuel is equivalent to that of the original diesel engine under the same condition. As the diesel injection starting point is 344°CA and there is simultaneous diesel and ethanol injection, the ethanol injection starting points at 344°CA, 338°CA, 332°CA, 326°CA and 320°CA are subject to 3D simulation for fuel injection, mixed gas formation and combustion and pollutant formation process. The results show that, the earlier the ethanol injection is, the steeper the heat release rate curve during the initial combustion period, the higher the peak value, and the shorter the heat release duration are, and the higher the maximum combustion pressure, the headmost phase of the maximum combustion pressure and the more obvious the premixed combustion are. Earlier ethanol injection starting point and quicker rise of the temperature curve of the cylinder bring the headmost phase of the highest average temperature in the cylinder, and higher average temperature in the cylinder brings higher NO concentration. The ethanol injection starting point shall be earlier than the diesel injection starting point injection, for it is the most favorable for reducing soot generation.

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Multi-zone modeling of combustion and emissions formation in DI diesel engine operating on ethanol–diesel fuel blends

Cited by 122 publications

References 48 publications

Experimental heat release analysis and emissions of a HSDI diesel engine fueled with ethanol–diesel fuel blends

Experimental heat release analysis and emissions of a HSDI diesel engine fueled with ethanol–diesel fuel blends

Analysis on Combustion Process of Ethanol - Diesel Direct Injection Engine with Two-stage Ethanol Injection Ignited by Diesel

Analysis on the Combustion Process of the Ethanol - Diesel Direct Injection Engine with Simultaneous Diesel and Ethanol Injection (with Ethanol Injection Starting Point Earlier than the Diesel Injection Starting Point)

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