Time-resolved temperature measurements in a rapid compression machine using quantum cascade laser absorption in the intrapulse mode

Handle URI:
http://hdl.handle.net/10754/621766
Title:
Time-resolved temperature measurements in a rapid compression machine using quantum cascade laser absorption in the intrapulse mode
Authors:
Nasir, Ehson Fawad ( 0000-0003-1822-737X ) ; Farooq, Aamir ( 0000-0001-5296-2197 )
Abstract:
A temperature sensor based on the intrapulse absorption spectroscopy technique has been developed to measure in situ temperature time-histories in a rapid compression machine (RCM). Two quantum-cascade lasers (QCLs) emitting near 4.55μm and 4.89μm were operated in pulsed mode, causing a frequency "down-chirp" across two ro-vibrational transitions of carbon monoxide. The down-chirp phenomenon resulted in large spectral tuning (δν ∼2.8cm-1) within a single pulse of each laser at a high pulse repetition frequency (100kHz). The wide tuning range allowed the application of the two-line thermometry technique, thus making the sensor quantitative and calibration-free. The sensor was first tested in non-reactive CO-N2 gas mixtures in the RCM and then applied to cases of n-pentane oxidation. Experiments were carried out for end of compression (EOC) pressures and temperatures ranging 9.21-15.32bar and 745-827K, respectively. Measured EOC temperatures agreed with isentropic calculations within 5%. Temperature rise measured during the first-stage ignition of n-pentane is over-predicted by zero-dimensional kinetic simulations. This work presents, for the first time, highly time-resolved temperature measurements in reactive and non-reactive rapid compression machine experiments. © 2016 Elsevier Ltd.
KAUST Department:
Clean Combustion Research Center; Physical Sciences and Engineering (PSE) Division
Citation:
Nasir EF, Farooq A (2016) Time-resolved temperature measurements in a rapid compression machine using quantum cascade laser absorption in the intrapulse mode. Proceedings of the Combustion Institute. Available: http://dx.doi.org/10.1016/j.proci.2016.07.010.
Publisher:
Elsevier BV
Journal:
Proceedings of the Combustion Institute
Issue Date:
16-Jul-2016
DOI:
10.1016/j.proci.2016.07.010
Type:
Article
ISSN:
1540-7489
Sponsors:
Clean Combustion Research Center
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorNasir, Ehson Fawaden
dc.contributor.authorFarooq, Aamiren
dc.date.accessioned2016-11-03T13:24:28Z-
dc.date.available2016-11-03T13:24:28Z-
dc.date.issued2016-07-16en
dc.identifier.citationNasir EF, Farooq A (2016) Time-resolved temperature measurements in a rapid compression machine using quantum cascade laser absorption in the intrapulse mode. Proceedings of the Combustion Institute. Available: http://dx.doi.org/10.1016/j.proci.2016.07.010.en
dc.identifier.issn1540-7489en
dc.identifier.doi10.1016/j.proci.2016.07.010en
dc.identifier.urihttp://hdl.handle.net/10754/621766-
dc.description.abstractA temperature sensor based on the intrapulse absorption spectroscopy technique has been developed to measure in situ temperature time-histories in a rapid compression machine (RCM). Two quantum-cascade lasers (QCLs) emitting near 4.55μm and 4.89μm were operated in pulsed mode, causing a frequency "down-chirp" across two ro-vibrational transitions of carbon monoxide. The down-chirp phenomenon resulted in large spectral tuning (δν ∼2.8cm-1) within a single pulse of each laser at a high pulse repetition frequency (100kHz). The wide tuning range allowed the application of the two-line thermometry technique, thus making the sensor quantitative and calibration-free. The sensor was first tested in non-reactive CO-N2 gas mixtures in the RCM and then applied to cases of n-pentane oxidation. Experiments were carried out for end of compression (EOC) pressures and temperatures ranging 9.21-15.32bar and 745-827K, respectively. Measured EOC temperatures agreed with isentropic calculations within 5%. Temperature rise measured during the first-stage ignition of n-pentane is over-predicted by zero-dimensional kinetic simulations. This work presents, for the first time, highly time-resolved temperature measurements in reactive and non-reactive rapid compression machine experiments. © 2016 Elsevier Ltd.en
dc.description.sponsorshipClean Combustion Research Centeren
dc.publisherElsevier BVen
dc.subjectAbsorption spectroscopyen
dc.titleTime-resolved temperature measurements in a rapid compression machine using quantum cascade laser absorption in the intrapulse modeen
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalProceedings of the Combustion Instituteen
kaust.authorNasir, Ehson Fawaden
kaust.authorFarooq, Aamiren
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