000014818 001__ 14818
000014818 005__ 20161115100203.0
000014818 04107 $$aeng
000014818 046__ $$k2016-08-21
000014818 100__ $$aBennewitz, John
000014818 24500 $$aPeriodic Partial Extinction in Acoustically Coupled Fuel Droplet Combustion

000014818 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014818 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014818 506__ $$arestricted
000014818 520__ $$2eng$$aThis experimental study investigates the response of burning liquid fuel droplets exposed to one-dimensional standing waves created within an acoustic waveguide. Building upon prior droplet combustion studies1 quantifying mean and temporal flame response of several alternative fuels to moderate acoustic excitation, the present work extends recent studies2 pertaining to the discovery of periodic partial extinction of flames during exposure to higher amplitude acoustic forcing. This investigation explores several alternative liquid fuels exposed to a range of acoustic forcing conditions (frequencies and amplitudes) creating sustained oscillatory combustion, periodic partial extinction, and full extinction. Phase-locked OH* chemiluminescence imaging and local temporal pressure measurements allow quantification of the combustion-acoustic coupling through the local Rayleigh index as well as temporal oscillations in the flame standoff distance. An estimation of the oscillatory strain rates experienced by the flames during excitation helps to explain specific relationships among acoustic, chemical, and fluid mechanical/straining time scales that can lead to periodic flame extinction.

000014818 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014818 653__ $$a

000014818 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014818 720__ $$aBennewitz, John
000014818 8560_ $$ffischerc@itam.cas.cz
000014818 8564_ $$s205347$$uhttps://invenio.itam.cas.cz/record/14818/files/TS.FS01-3.06.pdf$$yOriginal version of the author's contribution as presented on CD,  page 3071, code TS.FS01-3.06
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000014818 962__ $$r13812
000014818 980__ $$aPAPER