Abstract
The paper discuses a possibility of application of the dynamic vivacity function defined in COS 137604 (STANAG 4115) at the interior ballistic process mathematical model conversion. At present time various technologies of powder grain surfacing are used mainly in case of powders used in assemblies of small-calibre cartridges. The grain surfacing can properly influence the shot process, change character of the powder grain burning which cannot be described by the burning theory according to geometrical rules. COS 137604 determines necessity of the dynamic vivacity function L evaluation for artillery powders only, but the way of its evaluation can be applied for arbitrary powder. It then allows the get results of the interior ballistic tasks solutions with higher accuracy as well as the choice of the suitable grain surfacing technology.
Highlights
Interior ballistics of barrel weapons solves a whole range of theoretical and practical tasks which serve for interior ballistic system primary design, which means for the evaluation of various experiments and proper firings
One of the benefits of the essential internal ballistic theoretical task solution is the design of the propulsive powder charge mass and properties for an achievement of the required weapon parameters
Various ways of the powder grains surfacing evoked by the tendency to influence the shot process make it impossible to use the standard mathematical models
Summary
Interior ballistics of barrel weapons solves a whole range of theoretical and practical tasks which serve for interior ballistic system primary design, which means for the evaluation of various experiments and proper firings. The theoretical solution of the interior ballistic process uses various mathematic models based usually on the common assumptions of the geometrical concept of the powder charge burning and powder linear burning law. Both the geometrical burning concept of the powder grains and the linear burning law of the powder are based only on theoretical assumptions Both can be replaced by other dependences to approach the results of the interior ballistic model solutions to the experimental results. The possibility of the interior ballistic process mathematical model solution with the higher accuracy is expressed by application of the dynamic vivacity function L evaluated from experiments. Such approach has not been published yet. The unit-burning rate will not be a constant value anymore
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