Flow field and scalar measurements in a series of turbulent partially-premixed dimethyl ether/air jet flames

Journal Article · Sun Mar 12 00:00:00 EST 2017 · Combustion and Flame

DOI:https://doi.org/10.1016/j.combustflame.2017.02.014· OSTI ID:1356833

Coriton, Bruno  ^[1]; Im, Seong -Kyun ^[2]; Gamba, Mirko ^[3]; Frank, Jonathan H. ^[1]

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1. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
2. Univ. of Notre Dame, Notre Dame, IN (United States)
3. Univ. of Michigan, Ann Arbor, MI (United States)

Here, we present a series of benchmark flames consisting of six partially-premixed piloted dimethyl ether (DME)/air jet flames. These flames provide an opportunity to understand turbulence-flame interactions for oxygenated fuels and to develop predictive models for these interactions using a canonical burner geometry. The development of accurate models for DME/air flames would establish a foundation for studies of more complex oxygenated fuels. The flames are stabilized on a piloted jet burner similar to that of the partially-premixed methane/air jet flames that have been studied extensively within the context of the TNF Workshop. This series of six jet flames spans jet exit Reynolds numbers, Re_D, from 29,300 to 73,300 and stoichiometric mixture fractions, ξ_st, from 0.35 to 0.60. Flame conditions range from very low probability of localized extinction to a high probability of localized extinction and subsequent re-ignition. Measurements in the flames are compared at downstream locations from 5 to 25 diameters above the nozzle exit. Mean and fluctuating velocity components are measured using stereo particle image velocimetry (SPIV). Simultaneous laser-induced fluorescence (LIF) imaging of OH and CH₂O provides insights into the distribution of these intermediate species in partially-premixed DME/air flames. OH LIF imaging is also combined with SPIV to investigate the strain rate field across the reaction zone.

• Research Organization: Sandia National Lab. (SNL-CA), Livermore, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• Grant/Contract Number: AC04-94AL85000; AC04-94-AL85000; FC08NA28614
• OSTI ID: 1356833
• Alternate ID(s): OSTI ID: 1419136
• Report Number(s): SAND-2017-3019J; PII: S0010218017300573
• Journal Information: Combustion and Flame, Vol. 180, Issue C; ISSN 0010-2180
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
DME
turbulent jet flames
PIV
OH LIF
CH2O LIF
TNF workshop