Topic
Burn rate (chemistry)
About: Burn rate (chemistry) is a research topic. Over the lifetime, 847 publications have been published within this topic receiving 8908 citations. The topic is also known as: Burning rate.
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16 Jun 1986
1 citations
Journal Article•
TL;DR: In this article, the effect of spectrum on the technetium burn rate was evaluated by arbitrarily reducing the moderator density, and two different loading philosophies were considered: homogeneous fuel/target pins loaded throughout the core and a small number of target-only pins loaded in a few locations in the core.
Abstract: With the increasing interest in burning radioactive waste in nuclear reactors, it is relevant to begin comparing various techniques for accomplishing this. For the purpose of this study, a typical, commercial-style reactor was used as the burner, and {sup 99}Tc was used as the target material. Two different loading philosophies were considered: homogeneous fuel/target pins loaded throughout the core and a small number of target-only pins loaded in a few locations in the core. Analytical models of the two cores were developed for two different computer codes: WIMS-E and MCNP. For an initial investigation, the effect of spectrum on the technetium burn rate was evaluated by arbitrarily reducing the moderator density.
1 citations
Journal Article•
TL;DR: In this paper, the gas generation rule for tubular gun propellants with two different burning rate layers was theoretically analyzed under the precondition of following the geometric combustion law, and the equations describing the Γ vs.Ψ relation of this kind of variable burning rate gun propellant were derived by using its initial geometric size, burning-rate ratio and density ratio of internal and external layer as the basic variables.
Abstract: To establish the Γ vs.Ψ expression,the gas generation rule about tubular gun propellant with two different burning rate layers was theoretically analyzed.Under the precondition of following the geometric combustion law,the equations describing Γ vs.Ψ relation of this kind of variable burning rate gun propellant were derived by using its initial geometric size,burning-rate ratio and density ratio of internal and external layer as the basic variables.The critical length-to-diameter ratio needed for elaborating the characteristics of progressive combustion of this gun propellant was obtained.The influences of inner diameter,length-to-diameter ratio and burning-rate ratio of this gun propellant on its gas generation rule were discussed through calculated Γ-Ψ curve examples.The calculated results showed that this tubular gun propellants with two layers can present progressive combustion in early stage while a step of Γ in intermediate or late stage when the initial geometric size and burning-rate ratio have proper values.
1 citations
19 Aug 2019
1 citations
TL;DR: Low-thrust long-burn-time solid rocket motors may be useful as propulsion for small, fast, uncrewed aerial vehicles as discussed by the authors, but they require a slow-burning propellant that can operate at unusually low...
Abstract: Low-thrust long-burn-time solid rocket motors may be useful as propulsion for small, fast, uncrewed aerial vehicles. These motors require a slow-burning propellant that can operate at unusually low...
1 citations