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dc.contributor.authorLowe, A.
dc.contributor.authorThomas, L.M.
dc.contributor.authorSatija, A.
dc.contributor.authorLucht, R.P.
dc.contributor.authorMasri, A.R.
dc.date.accessioned2018-11-11T09:00:00Z
dc.date.available2018-11-11T09:00:00Z
dc.date.issued2018-07-31
dc.identifier.citationLowe A, Thomas LM, Satija A, Lucht RP, Masri AR (2018) Chirped-probe-pulse femtosecond CARS thermometry in turbulent spray flames. Proceedings of the Combustion Institute. Available: http://dx.doi.org/10.1016/j.proci.2018.06.149.
dc.identifier.issn1540-7489
dc.identifier.doi10.1016/j.proci.2018.06.149
dc.identifier.urihttp://hdl.handle.net/10754/629785
dc.description.abstractThis paper presents temperature measurements in turbulent dilute and dense spray flames using single-laser-shot chirped-probe-pulse femtosecond coherent anti-Stokes Raman spectroscopy (CPP-fs-CARS). This ultrafast technique, with a repetition rate of 5 kHz, is applied to the piloted Sydney Needle Spray Burner (SYNSBURNTM). The burner system features air-blast atomization of liquid injected from a needle that can be translated within a co-flowing air stream. The pilot-stabilized spray flames can range between the two extremes of dense and dilute by physically translating the needle tip relative to the burner's exit plane. The CPP-fs-CARS set-up has achieved integration times of 3 picoseconds (ps) as well as spatial resolution of approximately 800 µm along beam propagation and 60 µm in the transverse dimension. Brief details of the technique, calibration, correction of interferences, and spectral fitting processes are presented along with estimates of the associated error. The measurements are compared against well-established, line Raman–Rayleigh data for temperature collected in a turbulent CH4/air jet diffusion flame, which is largely non-sooting. At peak gaseous flame temperatures of up to 2512 K, the relative accuracy and precision were 2.8% and ±3.4%, respectively. Measurements in turbulent spray flames are shown after applying the relevant corrections based on non-resonant background (NRB) behavior and camera saturation effects on the shape of the CARS signal spectrum. Preliminary mapping of the temperature fields demonstrates the wealth of information available in this dataset which will provide insights into the spatio-temporal structure of spray flames once relevant statistical analysis is applied.
dc.description.sponsorshipThe Sydney group is supported by the Australian Research Council. The Purdue group is supported by the U.S. Department of Energy, Division of Chemical Sciences, Geosciences and Biosciences under Grant No. DE-FG02-03ER15391 and by the King Abdullah University of Science and Technology under CCF sub-award No. 1975-01.
dc.publisherElsevier BV
dc.subjectTemperature measurements
dc.subjectTurbulent spray flames
dc.subjectFemtosecond-CARS
dc.titleChirped-probe-pulse femtosecond CARS thermometry in turbulent spray flames
dc.typeArticle
dc.identifier.journalProceedings of the Combustion Institute
dc.contributor.institutionSchool of Aerospace Mechanical and Mechatronic Engineering, University of Sydney, Level 4, Mechanical Engineering Building J07, NSW 2006, Australia
dc.contributor.institutionSchool of Mechanical Engineering, Purdue University, West Lafayette, IN 47906 USA
kaust.grant.number1975-01
dc.date.published-online2018-07-31
dc.date.published-print2018-07


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