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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01 Jan 1997-Metallurgical and Materials Transactions B-process Metallurgy and Materials Processing Science
TL;DR: In this paper, Similitude theory is applied to metal combustion under conditions of the NASA/ASTM flammability test system in order to identify rate-controlling regimes and conditions of heterogeneous reaction.
Abstract: The burning of metals in enriched oxygen atmospheres includes multiple phases and, therefore, satisfies the definition of being a heterogeneous system. For a reaction to be considered heterogeneous, however, the site of the chemical transformation must be at an interface. While the Wagner theory of metal oxidation gives satisfactory mechanisms for this type of reaction for solid metals, no comparable theory is available for metal oxidation when the temperature is above the melting point of the metal. Similitude theory is applied to metal combustion under conditions of the NASA/ASTM flammability test system in order to identify rate-controlling regimes and conditions of heterogeneous reaction. Above 4 MPa, the observed burn rate for iron is proportional to the sample dimension, L, as L−0.7. Analysis shows that the heat transfer rate between the reaction surface and the solid rod is proportional to L−0.5 and may, therefore, be the rate-determining process for the system.
6 citations
TL;DR: In this article, an experimental investigation was conducted to characterize the combustion of a monopropellant isopropyl nitrate (IPN) strand, and the effect of ambient pressure and strand diameter on the linear burning rates of pure IPN was elucidated.
6 citations
Patent•
01 Jun 1982TL;DR: In this paper, a closed vessel apparatus for rapidly determining the burning rate of uncd propellant is presented, which includes a sealed vessel enclosing a propellant in a holder, and an ignition wire is mounted in the vessel for igniting the propellant.
Abstract: A closed vessel apparatus for rapidly determining the burning rate of uncd propellant. Apparatus includes a closed vessel enclosing a propellant in a holder. An ignition wire is mounted in the vessel for igniting the propellant. A pressure transducer is provided for detecting the pressure rise in the vessel and an electronic circuit triggers the start and stop of pressure integration. This data is fed to a data print out circuit.
6 citations
01 Jan 1969
TL;DR: In this paper, solid propellant burning rate behavior during abrupt environmental pressure excursions, using transient combustion model, is investigated. But the model is not suitable for the case of large-scale combustion.
Abstract: Solid propellant burning rate behavior during abrupt environmental pressure excursions, using transient combustion model
6 citations
TL;DR: In this article, the results of modelling combustion products of solid propellant flow are presented, and the basic parameters have been determined by numerical simulation. But the results are limited to condenensed systems, whose mass burning rate is in direct proportion to the environment pressure.
Abstract: Presents the results of modelling combustion products of solid propellant flow. The product of combustion is the ionized gas occurring in a channel with current conducting walls, when a part of the channel is in the external homogeneous magnetic field, oriented in such a way that the ponderomotive force, occuring in the flow region, is opposite to the flow. This results in gas deceleration and increase of static pressure. For the condenensed systems, whose mass burning rate is in direct proportion to the environment pressure, the static pressure increase causes increase of mass burning rate. The basic parameters have been determined by numerical simulation. The nature of their influence on the process of combustion in a cylindrical channel has also been determined. The study revealed that a ten-fold increase of burning rate is possible at moderate values of the parameter of magnetogasdynamic interaction.
6 citations