Combustible cartridge case combustion speed calculation method based on skeleton structure

Abstract

The invention discloses a combustible cartridge case combustion speed calculation method based on a skeleton structure, which is suitable for calculating the combustion speed of a combustible cartridge case. According to the method, a calculation method based on a cellulose skeleton structure is adopted, the formula composition, process forming and porosity of the combustible cartridge are fully considered, and key parameters influencing the combustion speed of the combustible cartridge can be calculated; a calculation method based on combustible cartridge case size parameters is adopted, the combustion process and the combustion inner trajectory process of propellant powder and charge can be organically combined, and the design precision of the whole ammunition system is improved; a calculation technology which takes each formula component and a skeleton structure of the combustible cartridge as independent items is adopted, combustion characteristic characterization of the combustible cartridge with any multiple formula components can be realized, and the calculation complexity is not increased according to the quantity of the components. According to the invention, the problem of accurate calculation of the combustion speed of the combustible cartridge case based on actual formula composition and process molding is solved, and a technical means for calculating the combustion speed of the combustible cartridge case based on a skeleton structure is provided.

Description

technical field [0001] The invention relates to the technical field of combustible cartridges, in particular to the calculation of the burning velocity of the combustible cartridge, and in particular to a combustible cartridge containing cellulose, which can realize the calculation of the burning velocity. Background technique [0002] The combustible cartridge is a combustible component with energetic components and high mechanical strength, which can replace the function of the propellant cartridge under certain conditions of use. It is generally composed of nitrocellulose, cellulose and auxiliary energetic substances. It is mainly used in In large caliber artillery and other ammunition requiring flammable casings. Both nitrocellulose and auxiliary energetic materials conform to the conventional parallel layer combustion law. The cellulose has a strip or floc structure and does not contain energy. It is mainly used as a reinforced skeleton and can improve the mechanical pr...

AI Technical Summary

Problems solved by technology

The combined structure of this formula makes the combustible cartridge show the law of non-parallel layer combustion as a whole, which makes it difficult to calculate the burning rate of the combustible cartridge

The commonly used methods for calculating the burning rate of combustible cartridges are as follows: (1) Using the method of mass percentage characterization, the entire combustible cartridge is regarded as a whole, regardless of its combustion process, and the generated pressure is considered to be related to the mass of the combustible cartridge Related, this method can only be expressed macroscopically, and cannot describe the combustion process of the combustible cartridge, which is of little significance in actual use and is rarely used; The law of combustion is completely expressed by the law of parallel layer combustion. This method is widely used, but it has major defects, because it does not match the actual material composition, and it cannot accurately describe the combustion process of the combustible cartridge, and the error is large. This is because the proportion of cellulose that does not satisfy the combustion law of parallel layers is large and cannot be ignored; (3) The effect of porosity on the combustion characteristics of combustible cartridges was considered in the study, but it was not used in the calculation of burning rate. considerations, leading to poor accuracy in the calculation of the burning rate of combustible cartridges

Therefore, the existing calculation methods cannot better obtain the burning rate of the combustible cartridge

[0003] From the technical information retrieved so far, there is no method for calculating the burning rate of combustible cartridges that can consider the actual composition and process of combustible cartridges, and scientifically characterize the combustion process.

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