Low-Temperature Combustion: An Advanced Technology for Internal Combustion Engines

Singh, Akhilendra Pratap; Ágarwal, Avinash Kumar

doi:10.1007/978-981-10-7575-9_2

Cited by 22 publications

(14 citation statements)

References 92 publications

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“…Consequently, technologies oriented towards direct reductions of incylinder emissions are gaining interest. In this regard, the advanced combustion modes such as low temperature combustion (LTC) are considered as promising ways to reduce NOX and soot emissions whilst keeping high combustion efficiency [2,3], which could contribute to the simplification of the aftertreatment devices. The use of high exhaust gas recirculation rates (EGR) combined with more premixed conditions than in conventional diesel combustion allow achieving extremely low soot and NOX emissions [4].…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Diffusive Flame Structure for Dodecane and OME <sub>X</sub> Fuels for Conditions of Spray A of the ECN

Soriano

Oliver

Micó

et al. 2020

SAE Int. J. Adv. & Curr. Prac. in Mobility

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A comparison of the flame structure for two different fuels, dodecane and oxymethylene dimethyl ether (OMEX), has been performed under condition of Spray A of the Engine Combustion Network (ECN). The experiments were carried out in a constant pressure vessel with wide optical access, at high pressure and temperature and controlled oxygen concentration. The flame structure analysis has been performed by measuring the formaldehyde and OH radical distributions using planar Laser-Induced Fluorescence (PLIF) techniques. To complement the analysis, this information was combined with that obtained with highspeed imaging of OH * chemiluminescence radiation in the UV. Formaldehyde molecules are excited with the 355-nm radiation from the third harmonic of a Nd:YAG laser, whilst OH is excited with a wavelength of 281.00-nm from a dye laser. In both cases, the beam was transformed into a laser sheet in order to excite an axial flame plane and the fluorescence radiation was collected with an intensified camera (ICCD) and proper filtering. Consequently, two-dimensional maps in the axial flame plane were obtained at different instants after the start of injection (ASOI). Signal from both formaldehyde and OH chemical species can be compared, in order to analyze spatial distribution and interaction. When dodecane and OMEX are compared, several differences arise. The second one presents larger lift-off length but remarkably shorter flame length. Additionally, it has been possible to appreciate for this fuel a lower amount of soot formation during combustion.

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Section: Introductionmentioning

confidence: 99%

Comparison of the Diffusive Flame Structure for Dodecane and OME <sub>X</sub> Fuels for Conditions of Spray A of the ECN

Soriano

Oliver

Micó

et al. 2020

SAE Int. J. Adv. & Curr. Prac. in Mobility

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“…Dimethyl ether (DME) is one attractive candidate which has been regarded as a cleanburning, non-toxic, and potentially renewable fuel. Its high cetane value (55)(56)(57)(58)(59)(60) and quiet combustion, as well as its inexpensive fueling system, make it a promising diesel alternative that could meet increasingly stringent emission limits. Because of its lack of carbon-to-carbon bonds, using DME as an alternative to diesel can virtually eliminate particulate matter emissions [15][16][17][18] and thus negate the need for costly diesel particulate filters.…”

Section: Introductionmentioning

confidence: 99%

Influence of pentanol and dimethyl ether blending with diesel on the combustion performance and emission characteristics in a compression ignition engine under low temperature combustion mode

Raza

Chen

Ruiz

et al. 2019

Journal of the Energy Institute

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Dimethyl ether (DME) and n-pentanol can be derived from non-food based biomass feedstock without unsettling food supplies and thus attract increasing attention as promising alternative fuels, yet some of their unique fuel properties different from diesel may significantly affect engine operation and thus limit their direct usage in diesel engines. In this study, the influence of n-pentanol, DME and diesel blends on the combustion performance and emission characteristics of a diesel engine under lowtemperature combustion (LTC) mode was evaluated at various engine loads (0.2-0.8 MPa BMEP) and two Exhaust Gas Recirculation (EGR) levels (15% and 30%). Three test blends were prepared by adding different proportions of DME and n-pentanol in baseline diesel and termed as D85DM15, D65P35, and D60DM20P20 respectively. The results showed that particulate matter (PM) mass and size-resolved PM number concentration were lower for D85DM15 and D65P35 and the least for D60DM20P20 compared ACCEPTED MANUSCRIPT with neat diesel. D60DM20P20 turned out to generate the lowest NO x emissions among the test blends at high engine load, and it further reduced by approximately 56% and 32% at low and medium loads respectively. It was found that the combination of medium EGR (15%) level and D60DM20P20 blend could generate the lowest NO x and PM emissions among the tested oxygenated blends with a slight decrease in engine performance. THC and CO emissions were higher for oxygenated blends than baseline diesel and the addition of EGR further exacerbated these gaseous emissions. This study demonstrated a great potential of n-pentanol, DME and diesel (D60DM20P20) blend in compression ignition engines with optimum combustion and emission characteristics under low temperature combustion mode, yet long term durability and commercial viability have not been considered.

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“…In the new engine applications have a process in which a homogeneous mixture of air and fuel is compressed under the conditions in which auto ignition occurs close to the end of the compression stroke, followed by combustion, which is significantly faster than conventional diesel or Otto combustion. The auto-ignition and combustion phasing in cylinder are controlled by mixture stratification and fuel injection timing [88][89][90][91][92][93]. These engine applications compared to conventional engines allows to reduce nitrogen oxide and soot emissions and to achieve higher thermal efficiency [94][95][96][97][98].…”

Section: Alternative Fuels For New Ice Applicationsmentioning

confidence: 99%

Alternative Fuels for Internal Combustion Engines

İlhak¹,

Tangöz²,

Akansu³

et al. 2019

The Future of Internal Combustion Engines

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Researchers have studied on alternative fuels that can be used with gasoline and diesel fuels. Alternative fuels such as hydrogen, acetylene, natural gas, ethanol and biofuels also uses in internal combustion engines. Hydrogen in the gas phase is about 14 times lighter than the air. Moreover, it is the cleanest fuel in the world. On the other hand because of its high ignition limit (4-75%), low ignition energy, needs special design to use as pure hydrogen in internal combustion engines. It is proved that hydrogen improves the combustion, emissions and performance, when is added as 20% to fuels. Natural gas is generally consisting of methane (85-96%) and it can be used in both petrol and diesel engines. Ethanol can be used as pure fuel or mixed with different fuels in internal combustion engines. In this section, the effects of natural gas, hydrogen, natural gas + hydrogen (HCNG), ethanol, ethanol + gasoline, ethanol + hydrogen, acetylene, acetylene + gasoline mixtures on engine performance and emissions have been examined.

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Low-Temperature Combustion: An Advanced Technology for Internal Combustion Engines

Cited by 22 publications

References 92 publications

Comparison of the Diffusive Flame Structure for Dodecane and OME <sub>X</sub> Fuels for Conditions of Spray A of the ECN

Comparison of the Diffusive Flame Structure for Dodecane and OME <sub>X</sub> Fuels for Conditions of Spray A of the ECN

Influence of pentanol and dimethyl ether blending with diesel on the combustion performance and emission characteristics in a compression ignition engine under low temperature combustion mode

Alternative Fuels for Internal Combustion Engines

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