Optical studies of spray development and combustion characterization of oxygenated and Fischer-Tropsch fuels

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Lima Ochoterena, Raul,1978Chalmers tekniska högskola,Chalmers University of Technology (author)

Optical studies of spray development and combustion characterization of oxygenated and Fischer-Tropsch fuels

Article/chapterEnglish2008

Publisher, publication year, extent ...

2008-04-14
400 Commonwealth Drive, Warrendale, PA, United States :SAE International,2008

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LIBRIS-ID:oai:research.chalmers.se:2c5f15ae-d0ac-48de-bc72-b53651b714fe
https://research.chalmers.se/publication/513053URI
https://doi.org/10.4271/2008-01-1393DOI
https://research.chalmers.se/publication/79376URI

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Language:English
Summary in:English

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Subject category:kon swepub-publicationtype
Subject category:ref swepub-contenttype

Notes

Optical studies of combusting diesel sprays were doneon three different alternative liquid fuels and compared toSwedish environmental class 1 diesel fuel (MK1). Thealternative fuels were Rapeseed Oil Methyl Ester (RME),Palm Oil Methyl Ester (PME) and Fischer-Tropsch (FT)fuel.The studies were carried out in the Chalmers HighPressure High Temperature spray rig under conditionssimilar to those prevailing in a direct-injected dieselengine prior to injection. High speed shadowgraphs wereacquired to measure the penetration of the continuousliquid phase, droplets and ligaments, and vaporpenetration. Flame temperatures and relative sootconcentrations were measured by emission based, lineof-sight, optical methods. A comparison betweenprevious engine tests and spray rig experiments wasconducted in order to provide a deeper explanation of thecombustion phenomena in the engine tests.Results pertaining to spray behavior show that highviscosity fuels have wider spray cone angles, smallerdischarge coefficients (Cd) and shorter vapor penetrationthan low viscosity fuels. Continuous liquid phasepenetration is related to differences in surface tension,viscosity and density; while the penetration of dropletsand ligaments is related to volatility, their penetration isshort for highly volatile fuels and long for low-volatilityfuels.Engine tests show that particle matter (PM) emissionsare generally lower when these alternative fuels areused, but the use of RME leads to increased NOxemissions correlating with elevated flame temperatures.

Subject headings and genre

TEKNIK OCH TEKNOLOGIER Annan teknik hsv//swe
ENGINEERING AND TECHNOLOGY Other Engineering and Technologies hsv//eng
TEKNIK OCH TEKNOLOGIER Maskinteknik Energiteknik hsv//swe
ENGINEERING AND TECHNOLOGY Mechanical Engineering Energy Engineering hsv//eng

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Larsson, Monica,1979Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)monlars (author)
Andersson, Sven B,1952Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)svan (author)
Denbratt, Ingemar,1951Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)denbratt (author)
Chalmers tekniska högskola (creator_code:org_t)

Related titles

In:2008 World Congress; Detroit, MI; United States; 14 April 2008 through 17 April 2008400 Commonwealth Drive, Warrendale, PA, United States : SAE International
In:SAE Technical Paper Series400 Commonwealth Drive, Warrendale, PA, United States : SAE International0148-7191

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