Matches in SemOpenAlex for { <https://semopenalex.org/work/W811291246> ?p ?o ?g. }
Showing items 1 to 82 of
82
with 100 items per page.
- W811291246 abstract "This paper discusses the aluminum particle combustion mechanism which has been expanded by inclusion of gas dissolution processes and ensuing internal phase transformations. This mechanism is proposed based on recent normal and microgravity experiments with particles formed and ignited in a pulsed micro-arc. Recent experimental findings on the three stages observed in Al particle combustion in air and shows the burning particle radiation, trajectory (streak), smoke cloud shapes, and quenched particle interiors are summarized. During stage I, the radiation trace is smooth and the particle flame is spherically symmetric. The temperature measured using a three-color pyrometer is close to 3000 K. Because it exceeds the aluminum boiling point (2730 K), this temperature most likely characterizes the vapor phase flame zone rather than the aluminum surface. The dissolved oxygen content within particles quenched during stage I was below the detection sensitivity (about 1 atomic %) for Wavelength Dispersive Spectroscopy (WDS). After an increase in the radiation intensity (and simultaneous decrease in the measured color temperature from about 3000 to 2800 K) indicative of the transition to stage II combustion, the internal compositions of the quenched particles change. Both oxygen-rich (approx. 10 atomic %) and oxygen-lean (< 1 %) regions are identified within the particles using back-scattered electron imaging and WDS. During stage II, oscillations are observed in particle radiation and the flame and smoke cloud are distorted from their original spherically-symmetric shape. In stage III, particle radiation continues to exhibit oscillations, but its radiation intensity drops and remains at a nearly constant level. The measured temperature decreases to about 2300 K. Also, larger changes in particle velocities are observed, and oxide caps are found on quenched particle surfaces. While these results showed the correlation between the aluminum particle combustion behavior and the evolution of its internal composition, the change from the spherically symmetric to asymmetric flame shape occurring upon the transition from stage I to stage II combustion could not be understood based only on the fact that dissolved oxygen is detected in the particles. The connection between the two phenomena appeared even less significant because in earlier aluminum combustion studies carried in O2/Ar mixtures, flame asymmetry was not observed as opposed to experiments in air or O2/CO mixtures. It has been proposed that the presence of other gases, i.e., hydrogen, or nitrogen causes the change in the combustion regime." @default.
- W811291246 created "2016-06-24" @default.
- W811291246 creator A5022792345 @default.
- W811291246 date "1999-05-01" @default.
- W811291246 modified "2023-09-26" @default.
- W811291246 title "Internal Heterogeneous Processes in Aluminum Combustion" @default.
- W811291246 hasPublicationYear "1999" @default.
- W811291246 type Work @default.
- W811291246 sameAs 811291246 @default.
- W811291246 citedByCount "2" @default.
- W811291246 countsByYear W8112912462017 @default.
- W811291246 crossrefType "journal-article" @default.
- W811291246 hasAuthorship W811291246A5022792345 @default.
- W811291246 hasConcept C105923489 @default.
- W811291246 hasConcept C111368507 @default.
- W811291246 hasConcept C113196181 @default.
- W811291246 hasConcept C120665830 @default.
- W811291246 hasConcept C121332964 @default.
- W811291246 hasConcept C127313418 @default.
- W811291246 hasConcept C145148216 @default.
- W811291246 hasConcept C147976105 @default.
- W811291246 hasConcept C153385146 @default.
- W811291246 hasConcept C178790620 @default.
- W811291246 hasConcept C184779094 @default.
- W811291246 hasConcept C185592680 @default.
- W811291246 hasConcept C192562407 @default.
- W811291246 hasConcept C2778517922 @default.
- W811291246 hasConcept C32993116 @default.
- W811291246 hasConcept C35048267 @default.
- W811291246 hasConcept C41999313 @default.
- W811291246 hasConcept C43617362 @default.
- W811291246 hasConcept C72293138 @default.
- W811291246 hasConcept C93038891 @default.
- W811291246 hasConcept C97355855 @default.
- W811291246 hasConceptScore W811291246C105923489 @default.
- W811291246 hasConceptScore W811291246C111368507 @default.
- W811291246 hasConceptScore W811291246C113196181 @default.
- W811291246 hasConceptScore W811291246C120665830 @default.
- W811291246 hasConceptScore W811291246C121332964 @default.
- W811291246 hasConceptScore W811291246C127313418 @default.
- W811291246 hasConceptScore W811291246C145148216 @default.
- W811291246 hasConceptScore W811291246C147976105 @default.
- W811291246 hasConceptScore W811291246C153385146 @default.
- W811291246 hasConceptScore W811291246C178790620 @default.
- W811291246 hasConceptScore W811291246C184779094 @default.
- W811291246 hasConceptScore W811291246C185592680 @default.
- W811291246 hasConceptScore W811291246C192562407 @default.
- W811291246 hasConceptScore W811291246C2778517922 @default.
- W811291246 hasConceptScore W811291246C32993116 @default.
- W811291246 hasConceptScore W811291246C35048267 @default.
- W811291246 hasConceptScore W811291246C41999313 @default.
- W811291246 hasConceptScore W811291246C43617362 @default.
- W811291246 hasConceptScore W811291246C72293138 @default.
- W811291246 hasConceptScore W811291246C93038891 @default.
- W811291246 hasConceptScore W811291246C97355855 @default.
- W811291246 hasLocation W8112912461 @default.
- W811291246 hasOpenAccess W811291246 @default.
- W811291246 hasPrimaryLocation W8112912461 @default.
- W811291246 hasRelatedWork W100212141 @default.
- W811291246 hasRelatedWork W1522911206 @default.
- W811291246 hasRelatedWork W1633703349 @default.
- W811291246 hasRelatedWork W1994143112 @default.
- W811291246 hasRelatedWork W2016748704 @default.
- W811291246 hasRelatedWork W2016854976 @default.
- W811291246 hasRelatedWork W2026385893 @default.
- W811291246 hasRelatedWork W2050436833 @default.
- W811291246 hasRelatedWork W2067504319 @default.
- W811291246 hasRelatedWork W2068053560 @default.
- W811291246 hasRelatedWork W2082359608 @default.
- W811291246 hasRelatedWork W2179294770 @default.
- W811291246 hasRelatedWork W2334315219 @default.
- W811291246 hasRelatedWork W2336125496 @default.
- W811291246 hasRelatedWork W2345951706 @default.
- W811291246 hasRelatedWork W2550897736 @default.
- W811291246 hasRelatedWork W2755745871 @default.
- W811291246 hasRelatedWork W2910200178 @default.
- W811291246 hasRelatedWork W3048904537 @default.
- W811291246 hasRelatedWork W771837968 @default.
- W811291246 isParatext "false" @default.
- W811291246 isRetracted "false" @default.
- W811291246 magId "811291246" @default.
- W811291246 workType "article" @default.