FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1993308773> ?p ?o ?g. }

• W1993308773 endingPage "768" @default.
• W1993308773 startingPage "764" @default.
• W1993308773 abstract "Our simulations of heterogeneous propellant combustion have always assumed that the oxidizer particles (ammonium perchlorate) are disks (two dimensional) or spheres (three dimensional). Here the effects on the burning rate are examined when the disks/spheres are replaced by ellipses/ellipsoids. In two dimensions, it is shown that an area-preserving deformation of a pack of disks, generating a pack of ellipses, can lead to significant variations in the burning rate. However, if the ellipses are randomly packed, so that the alignment of their axes is random, the shape effect is small. In three dimensions, volume-preserving deformation, which generates ellipsoids, leads to burning rate changes no greater than those in two dimensions. Absent a random packing algorithm for ellipsoids, it is speculated that here also a random alignment of the axes would eliminate the effect. ECENT years have seen significant advances in the modeling of heterogeneous propellant combustion, specifically in the context of ammonium‐perchlorate (AP)/hydroxyl-terminatedpolybutadiene propellants. In Ref. 1, a two-dimensional treatment, a numerical code is described in which the combustion field is fully coupled to heat conduction in the solid via a nonuniformly regressing nonplanar surface. The corresponding three-dimensional problem is described in Refs. 2 and 3, the first using two-step kinetics and the second three-step kinetics. Comparisons between the numerical results and experimental results of Miller 4 show that the effects of propellant morphology on burning rates can be satisfactorily predicted over a wide pressure range. At fixed pressure, the variations in burning rate due to different morphologies are as much as threefold, so that these are nontrivial predictions. In this connection, note how we chose the values of the numerous parameters for this problem, parameters identified in Refs. 1‐3. Most are typical values defined by the community at large. Some are uncertain, of course, particularly the surface pyrolysis parameters, but once a choice was made no post hoc adjustments were made to better fit the three-dimensional data of Miller. An important parameter subset is those of the gas kinetics, the reaction rates for the two-step and three-step kinetics. There, we used one-dimensional burning rate data for pure AP and for homogeneous blends of AP and binder. The use of a three-step mechanism enabled us to fit blend burning rates over a wide range of mixture ratios, and it is presumably for this reason that the three-step results are more accurate than the two-step results. Most important, our calculations are not a massive exercise in curve fitting. This does not mean that better choices for some of our parameter values are not possible. Although we reasonably capture qualitative aspects of sandwich burning, 3 most notably the surface topography, the surface topography in our three-dimensional simulations does not show concavity in the surfaces of large AP particles at pressures for which it is observed experimentally. It seems probable that this" @default.
• W1993308773 created "2016-06-24" @default.
• W1993308773 creator A5022641973 @default.
• W1993308773 creator A5054816707 @default.
• W1993308773 creator A5082633730 @default.
• W1993308773 date "2006-07-01" @default.
• W1993308773 modified "2023-09-23" @default.
• W1993308773 title "Burning of Ammonium-Perchlorate Ellipses and Spheroids in Fuel Binder" @default.
• W1993308773 cites W1972501564 @default.
• W1993308773 cites W2001032023 @default.
• W1993308773 cites W2015618713 @default.
• W1993308773 cites W2057155329 @default.
• W1993308773 cites W2072319050 @default.
• W1993308773 cites W2075773200 @default.
• W1993308773 cites W2136944565 @default.
• W1993308773 cites W2322444315 @default.
• W1993308773 cites W2027917508 @default.
• W1993308773 doi "https://doi.org/10.2514/1.15739" @default.
• W1993308773 hasPublicationYear "2006" @default.
• W1993308773 type Work @default.
• W1993308773 sameAs 1993308773 @default.
• W1993308773 citedByCount "16" @default.
• W1993308773 countsByYear W19933087732012 @default.
• W1993308773 countsByYear W19933087732015 @default.
• W1993308773 countsByYear W19933087732019 @default.
• W1993308773 countsByYear W19933087732021 @default.
• W1993308773 countsByYear W19933087732023 @default.
• W1993308773 crossrefType "journal-article" @default.
• W1993308773 hasAuthorship W1993308773A5022641973 @default.
• W1993308773 hasAuthorship W1993308773A5054816707 @default.
• W1993308773 hasAuthorship W1993308773A5082633730 @default.
• W1993308773 hasConcept C104779481 @default.
• W1993308773 hasConcept C121332964 @default.
• W1993308773 hasConcept C127413603 @default.
• W1993308773 hasConcept C159985019 @default.
• W1993308773 hasConcept C175369904 @default.
• W1993308773 hasConcept C178790620 @default.
• W1993308773 hasConcept C185592680 @default.
• W1993308773 hasConcept C192562407 @default.
• W1993308773 hasConcept C202751555 @default.
• W1993308773 hasConcept C2776704483 @default.
• W1993308773 hasConcept C2779870022 @default.
• W1993308773 hasConcept C39432304 @default.
• W1993308773 hasConcept C42360764 @default.
• W1993308773 hasConcept C55493867 @default.
• W1993308773 hasConcept C57879066 @default.
• W1993308773 hasConceptScore W1993308773C104779481 @default.
• W1993308773 hasConceptScore W1993308773C121332964 @default.
• W1993308773 hasConceptScore W1993308773C127413603 @default.
• W1993308773 hasConceptScore W1993308773C159985019 @default.
• W1993308773 hasConceptScore W1993308773C175369904 @default.
• W1993308773 hasConceptScore W1993308773C178790620 @default.
• W1993308773 hasConceptScore W1993308773C185592680 @default.
• W1993308773 hasConceptScore W1993308773C192562407 @default.
• W1993308773 hasConceptScore W1993308773C202751555 @default.
• W1993308773 hasConceptScore W1993308773C2776704483 @default.
• W1993308773 hasConceptScore W1993308773C2779870022 @default.
• W1993308773 hasConceptScore W1993308773C39432304 @default.
• W1993308773 hasConceptScore W1993308773C42360764 @default.
• W1993308773 hasConceptScore W1993308773C55493867 @default.
• W1993308773 hasConceptScore W1993308773C57879066 @default.
• W1993308773 hasIssue "4" @default.
• W1993308773 hasLocation W19933087731 @default.
• W1993308773 hasOpenAccess W1993308773 @default.
• W1993308773 hasPrimaryLocation W19933087731 @default.
• W1993308773 hasRelatedWork W1994103032 @default.
• W1993308773 hasRelatedWork W2014315543 @default.
• W1993308773 hasRelatedWork W2051270029 @default.
• W1993308773 hasRelatedWork W2082293200 @default.
• W1993308773 hasRelatedWork W2137307547 @default.
• W1993308773 hasRelatedWork W2380293314 @default.
• W1993308773 hasRelatedWork W2899084033 @default.
• W1993308773 hasRelatedWork W2943188944 @default.
• W1993308773 hasRelatedWork W4285802202 @default.
• W1993308773 hasRelatedWork W4317433637 @default.
• W1993308773 hasVolume "22" @default.
• W1993308773 isParatext "false" @default.
• W1993308773 isRetracted "false" @default.
• W1993308773 magId "1993308773" @default.
• W1993308773 workType "article" @default.