Spectroscopic measurements of premixed combustion in diesel engine

Mancaruso, Ezio; Vaglieco, Bianca Maria

doi:10.1016/j.fuel.2010.09.052

Cited by 28 publications

(15 citation statements)

References 25 publications

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“…NL images are used to illustrate the global flame structure, while OH Ã chemiluminescence is widely considered as the indicator of high temperature reaction in the flame. The OH Ã chemiluminescence was evident in the spectral analysis of premixed diesel combustion when implementing HCCI mode [33]. For the typical mixing controlled diesel flame, a distinct OH peak was found at 310 nm and a strong gray-body emission dominated the spectrum at wavelengths longer than 340 nm [34].…”

Section: Flame Structure and Oh ã Chemiluminescencementioning

confidence: 99%

High speed imaging of OH* chemiluminescence and natural luminosity of low temperature diesel spray combustion

Zhang

Wei

Fang

2012

Fuel

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Section: Flame Structure and Oh ã Chemiluminescencementioning

confidence: 99%

High speed imaging of OH* chemiluminescence and natural luminosity of low temperature diesel spray combustion

Zhang

Wei

Fang

2012

Fuel

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“…Fig. 1 Recreation of chemiluminescence spectrum showing the broadband background of the hydrocarbon chemiluminescence from CO * 2 , HCO * , and CH 2 O * , based on work from [2,3,5,6,14]. Note that this portion does not cover the entire range of CO * 2 emission as suggested by [14] In most gas turbine applications, CO * 2 is believed to be the main species contributing to the background chemiluminescence, reproduced in part in Fig.…”

Section: Introductionmentioning

confidence: 99%

$\mathrm{CO}_{2}^{*}$ chemiluminescence study at low and elevated pressures

et al. 2012

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Chemiluminescence experiments have been performed to assess the state of current CO * 2 kinetics modeling. The difficulty with modeling CO * 2 lies in its broad emission spectrum, making it a challenge to isolate it from background emission of species such as CH * and CH 2 O * . Experiments were performed in a mixture of 0.0005H 2 + 0.01N 2 O + 0.03CO + 0.9595Ar in an attempt to isolate CO * 2 emission. Temperatures ranged from 1654 K to 2221 K at two average pressures, 1.4 and 10.4 atm. The unique time histories of the various chemiluminescence species in the unconventional mixture employed at these conditions allow for easy identification of the CO * 2 concentration. Two different wavelengths to capture CO * 2 were used; one optical filter was centered at 415 nm and the other at 458 nm. The use of these two different wavelengths was done to verify that broadband CO * 2 was in fact being captured, and not emission from other species such as CH * and CH 2 O * . As a baseline for time history and peak magnitude comparison, OH * emission was captured at 307 nm simultaneously with the two CO * 2 filters. The results from the two CO * 2 filters were consistent with each other, implying that indeed the same species (i.e., CO * 2 ) was being measured at both wavelengths. A first-generation kinetics model for CO * 2 and CH 2 O * was developed, since no comprehensively validated one exists to date. CH 2 O * and CH * were ruled out as being present in the experiments at any measurable level, based on calculations and comparisons with the data. Agreement with

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“…In addition, the authors had evidence in past activities of two-stage autoignition process burning a homogenous mixture of diesel and air in compression ignition engine [22]. Also for low temperature combustion obtained by means of one and late injection and large amount of gas recirculating from the exhaust duct, the authors observed a two stage ignition, even if the low temperature heat release was very short [23].…”

Section: Diesel Injectormentioning

confidence: 96%

“…No delay and NTC was observed between the low and high temperature reactions. Also for low temperature combustion obtained by means of one and late injection and large amount of gas recirculating from the exhaust duct, the authors observed a two stage ignition, even if the low temperature heat release was very short [23].…”

Section: Introductionmentioning

confidence: 98%