Topic
Diffusion flame
About: Diffusion flame is a research topic. Over the lifetime, 9266 publications have been published within this topic receiving 233522 citations.
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TL;DR: In this paper, a kinetic mechanism for hydrocarbon flame inhibition by the potential halon replacement 2-BTP (2-Bromo-3, 3,3-trifluoropropene) has been assembled, and is used to study its effects on premixed methane-air flames.
67 citations
TL;DR: In this paper, an experimental study has been performed on the effects of injection rate shaping on the combustion process and exhaust emissions of a direct-injection diesel engine, where boot-type injections were generated by means of a modified pump-line nozzle system, which is able to modulate the instantaneous fuel injection rate.
67 citations
TL;DR: In this paper, a two-dimensional slot-burner is used to measure the velocities of premixed laminar flames with precision, and the accuracy of the measurements is investigated.
67 citations
TL;DR: In this paper, the effects of hydrogen and carbon monoxide addition on premixed methane/air flame dynamics in a heated narrow channel are numerically investigated using a time accurate, compressible flow solver along with the DRM-19 reaction mechanism.
67 citations
TL;DR: In this paper, the authors measured global emission indices for NO and NO, with velocity changes as the flame character changes from transitional-turbulent (Re ≈ 10000) to fully turbulent (Re > 20000).
Abstract: Measurements of global emission indices for NO and NO,were made in unconfined,vertical,propane jet diffusion flames. Initial fuel jet velocities were varied to provide a range of jet Reynolds numbers from 10000 to 60000. The measurements showed that scaling of NO, emission indices with velocity changes as the flame character changes from transitional-turbulent (Re ≈ 10000) to fully turbulent (Re > 20000). At the lower Re condition. the observed scaling approaches that reported in the literature for similar conditions. Arguments are presented to show that radiation losses from the flames may account for the observed scaling. Significant amounts ofN02 were found in the flame plumes. The variation of NO2/NOx, ratios with jet velocity and with radial position was consistent with the hypothesis that NO2is formed in the cooler post-flame regions. in agreement with the findings of others for CO and CO/H2 fueled diffusion flames.
67 citations