Role of fuel properties and piston shape in influencing soot oxidation in heavy-duty low swirl diesel engine combustion

Eismark, Jan; Christensen, Magnus; Andersson, Mats; Denbratt, Ingemar

doi:10.1016/j.fuel.2019.05.151

Cited by 31 publications

(17 citation statements)

References 29 publications

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“…The soot seems to be uniformly distributed inside the combustion chamber, with higher values from the periphery to the bowl center. Thus, in this application the wave influence corroborates with previous results reported by Eismark et al 12 These authors reported that the waves induce a change in the flame shape, which generates better oxygen supply for all flame regions. The same behavior can be seen for both conditions tested.…”

Section: Stepped Lip Versus Stepped Lip-wavesupporting

confidence: 91%

“…5,6 In order to meet the emissions levels required by regulations and reducing fuel consumption, different technologies regarding in-cylinder pollutant formation reduction have been tested and implemented in CI engines during the last decades. [7][8][9][10] A special attention has been paid on new piston geometries, where different designs have been developed and tested during the last years in order to study the effect of piston geometry on turbulent flow structure, 11 soot formation 12 and thermal efficiency. 13 The engine-out soot emissions in CI engines depend of two main process: in-cylinder soot formation and soot oxidation.…”

Section: Introductionmentioning

confidence: 99%

“…The results have shown a great potential in terms of soot reduction while keeping low NO X levels due to the efficient late cycle oxidation promoted by the bowl design. 12,34 Eismark et al 33 tested this piston geometry in a high pressure/ high temperature spray chamber and in a single cylinder engine. A strong decrease of up to 80% in soot emissions without NO X emissions penalization were found by the authors during the tests.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Soot reduction for cleaner Compression Ignition Engines through innovative bowl templates

Pastor

García

Micó

et al. 2020

International Journal of Engine Research

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Considering the need of pollutant emissions reduction and the high cost of the after-treatment systems, in-cylinder solutions for pollutant reduction are becoming more and more relevant. Among different proposals, new piston geometries are considered an attractive solution for reducing both soot and nitrogen oxides emissions in compression ignition engines. For this reason, this paper evaluates the soot formation and combustion characteristics of a novel piston geometry proposal, called stepped lip-wave, for light-duty engines. It is compared with other two well-known bowl geometries: re-entrant and stepped lip. The study was performed in an optical single-cylinder direct injection compression ignition engine. Two optical techniques (2 color pyrometry and OH* chemiluminescence) were applied for analyzing soot formation in each piston geometry. Test were performed at different engine loads, fuel injection characteristics and exhaust gas recirculation configuration. The re-entrant piston presents higher soot formation and a slower late oxidation process in comparison with the other two geometries. Stepped lip and stepped lip-wave present similar soot formation levels. However, stepped lip-wave showed a more efficient and faster soot oxidation process during the final combustion stages. Results confirm the potential of the stepped lip-wave concept to reduce soot emissions and achieve a cleaner energy production system.

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Section: Stepped Lip Versus Stepped Lip-wavesupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Soot reduction for cleaner Compression Ignition Engines through innovative bowl templates

Pastor

García

Micó

et al. 2020

International Journal of Engine Research

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show abstract

“…Other scholars have done a lot of research work on the injection and heat release performance of the nozzle in other fields, such as fuel injection [10] and thermosiphon [11]. Kawaguchi et al [12] carried out an in-depth study on the morphological fluctuation of the external flow field of the nozzle jet and believed that the fluctuation of the external jet was caused by the fluctuation of the internal flow field of the nozzle.…”

Section: Introductionmentioning

confidence: 99%

Research on the Flow Control of a Piston Cooling Nozzle

Zeng

Zhang

et al. 2022

Scientific Programming

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The flow rate of a piston cooling nozzle is usually adjusted by changing the parameters of convergent length and inner diameter of the nozzle in engineering. However, the influence law and quantitative relationship between the flow rate and them are not clear. In this paper, the structural model and three-dimensional model of internal flow field of piston cooling nozzle are established by analyzing the structural characteristics and actual working conditions of piston cooling nozzles. Based on Fluent software, the flow field of piston cooling nozzles is simulated and analyzed. The distribution of velocity and pressure inside the piston cooling nozzle are obtained. The flow rate of fluid field is also obtained inside a piston cooling nozzle. In addition, the variation law of flow rate of the piston cooling nozzle is studied with the increasing of nozzle convergent length and diameter through several simulation experiments, respectively. The results show that the flow rate of piston cooling nozzle decreases linearly with the increase of the nozzle closing length. The flow rate of nozzle increases nonlinearly with the increase of the convergent diameter. Compared with the convergent length, the change of convergent diameter has a greater influence on the flow rate of piston cooling nozzles. Finally, the analytical expression of the flow rate of piston cooling nozzle about the convergent diameter is obtained, which is of great value and guiding significance to the nozzle engineering design.

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“…Carbon monoxide (CO) emissions showed a lower concentration in assays performed with diesel fuel. The reason associated with this fact can be related to the physical properties of the fuel that show their effect during its use in an internal combustion engine [300]. In general terms, diesel fuel has been reported to contain a larger amount of energy per mass or volume unit than vegetable oils [301].…”

Section: Emission Measurement In Electricity Generation Resultsmentioning

confidence: 99%

Sustainable second-generation bioenergy alternatives for Ecuador

Meneses¹

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Role of fuel properties and piston shape in influencing soot oxidation in heavy-duty low swirl diesel engine combustion

Cited by 31 publications

References 29 publications

Soot reduction for cleaner Compression Ignition Engines through innovative bowl templates

Soot reduction for cleaner Compression Ignition Engines through innovative bowl templates

Research on the Flow Control of a Piston Cooling Nozzle

Sustainable second-generation bioenergy alternatives for Ecuador

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