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WFRF:(Johansson Lars Erik)
 

Sökning: WFRF:(Johansson Lars Erik) > (1990-1994) > Dual-broadband rota...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00003897naa a2200337 4500
001oai:lup.lub.lu.se:5fd3c743-b1f5-4d59-b706-72bc57d78353
003SwePub
008160629s1994 | |||||||||||000 ||eng|
0247 a https://lup.lub.lu.se/record/5fd3c743-b1f5-4d59-b706-72bc57d783532 URI
0247 a https://doi.org/10.1016/S0082-0784(06)80822-22 DOI
040 a (SwePub)lu
041 a engb eng
042 9 SwePub
072 7a art2 swepub-publicationtype
072 7a ref2 swepub-contenttype
1001 a Bengtsson, Per Eriku Lund University,Lunds universitet,Förbränningsfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Combustion Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH4 aut0 (Swepub:lu)forb-pbe
2451 0a Dual-broadband rotational cars measurements in an IC engine
264 1c 1994
300 a 8 s.
520 a This is the first report of pure rotational coherent anti-Stokes Raman spectroscopy (CARS) measurementsin an internal combustion (IC) engine. Single-shot, dual-broadband rotational CARS (DB-RCARS) spectra were recorded both prior to ignition and in the postcombustion gases. From these spectra, both temperature and relative oxygen concentrations were evaluated. The pressure was registered simultaneously with the CARS measurements in the spark-ignition engine burning natural gas and air. Prior to ignition, normally at temperatures below 1000 K and pressures below 2 MPa, a rotational CARS spectrum is very temperature sensitive, and the technique can be used for temperature measurements with high accuracy. Evaluated temperatures show a negligible dependence on uncertainties in parameters such as the nonresonant susceptibility of the gas and the slit width. Moreover, no collisional narrowing of the lines has to be taken into account. The relative standard deviation of evaluated temperatures and of relative oxygen concentrations from single-shot measurements were as low as 1, and 1.4-1.9%, respectively. In the postcombustion gases at temperatures above 2000 K and pressures above 1.5 MPa, the nonresonant CARS background gave a large contribution to the total spectrum. In this temperature and pressure range, the evaluated values of temperature and nonresonant susceptibility are not independent, and the nonresonant susceptibility had to be fixed at a precalculated value to get a reliable temperature evaluation. The avantages and disadvantages of rotational CARS in comparison with vibrational CARS for IC engine measurements are discussed.
7001 a Martinsson, Lars4 aut
7001 a Aldén, Marcusu Lund University,Lunds universitet,Förbränningsfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Combustion Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH4 aut0 (Swepub:lu)forb-mal
7001 a Johansson, Bengtu Lund University,Lunds universitet,Förbränningsmotorer,Institutionen för energivetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,Combustion Engines,Department of Energy Sciences,Departments at LTH,Faculty of Engineering, LTH4 aut0 (Swepub:lu)vok-bj
7001 a Lassesson, Bengt4 aut
7001 a Marforio, Karl4 aut
7001 a Lundholm, Gunnaru Lund University,Lunds universitet,Förbränningsmotorer,Institutionen för energivetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,Combustion Engines,Department of Energy Sciences,Departments at LTH,Faculty of Engineering, LTH4 aut0 (Swepub:lu)vok-gl
7102 a Förbränningsfysikb Fysiska institutionen4 org
7730 t Symposium (International) on Combustiong 25:1, s. 1735-1742q 25:1<1735-1742x 0082-0784
8564 u http://dx.doi.org/10.1016/S0082-0784(06)80822-2y FULLTEXT
8564 8u https://lup.lub.lu.se/record/5fd3c743-b1f5-4d59-b706-72bc57d78353
8564 8u https://doi.org/10.1016/S0082-0784(06)80822-2

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