A calculation method for interior ballistic characteristic parameters of mixed charge under plasma ignition

By establishing a calculation method for the interior ballistic characteristic parameters of mixed charges under plasma ignition, the limitations of the single charge structure in the existing model are solved, a comprehensive analysis of the impact of charge structure changes on interior ballistic performance is achieved, and the gunpowder combustion performance and projectile exit velocity are optimized.

CN114639450BActive Publication Date: 2025-09-05NANJING UNIV OF SCI & TECH
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Patent Information

Application Number
CN202210216931.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-03-06
Publication Date
2025-09-05
Estimated Expiration
2042-03-06

AI Technical Summary

Technical Problem

The existing electrothermal chemical launch interior ballistic model only considers a single charge structure and fails to comprehensively study the impact of charge structure changes on interior ballistic performance.

Method used

A method for calculating the interior ballistic characteristic parameters of mixed charges under plasma ignition was established, including determining the input power of the pulse power supply, establishing the formula for the propellant burning rate under plasma enhancement, calculating the propellant shape function, and establishing the projectile motion equation. Combined with the interior ballistic equation of electrothermal chemical launch, the pressure and velocity curves in the barrel during the projectile exiting the barrel were obtained through time marching solution.

Benefits of technology

It provides an interior ballistics calculation method that takes into account the mixed charge structure and plasma enhancement effect. It can quickly calculate the complete ballistic curve and characteristic point pressure and projectile velocity, optimize the gunpowder combustion performance, and enhance the weapon power.

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Abstract

The present invention proposes a method for calculating the interior ballistic characteristic parameters of a mixed charge under plasma ignition. The method includes determining the discharge parameters of a pulse power supply; establishing a formula for the gunpowder burning rate under plasma enhancement; determining the shape functions of two gunpowders; establishing a projectile motion equation and an electrothermal chemical launch interior ballistic equation; substituting the input electrical energy into the electrothermal chemical launch interior ballistic equation, combining the gunpowder burning rate formula and the shape function to perform a time-advancing solution, and finally using the projectile motion equation and the electrothermal chemical launch interior ballistic equation to obtain the internal pressure and projectile velocity curve during the projectile's discharge process. The present invention solves the problem of existing electrothermal chemical launch interior ballistic models that only consider a single charge structure, and can quickly and effectively calculate the internal pressure and projectile velocity curve during the discharge process of an electrothermal chemical launch projectile with a mixed charge structure.
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