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A Calculation Method of Plasma Density in Gun Barrel When Gunpowder Combusts

A technology of plasma and calculation methods, applied in calculation, design optimization/simulation, instruments, etc., to achieve the effect of increasing density

Inactive Publication Date: 2019-01-25
ACADEMY OF ARMORED FORCES ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are few studies in this area, only studies on the combustion of fossil fuels to generate plasma

Method used

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  • A Calculation Method of Plasma Density in Gun Barrel When Gunpowder Combusts
  • A Calculation Method of Plasma Density in Gun Barrel When Gunpowder Combusts
  • A Calculation Method of Plasma Density in Gun Barrel When Gunpowder Combusts

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Embodiment Construction

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0032] Such as figure 1 As shown, the present invention provides a method for calculating the plasma density in the gun barrel when the gunpowder burns, comprising the following steps:

[0033] Step 1 S110: Acquiring bore structure parameters and charge parameters.

[0034] Step 2 S120: Establish gunpowder combustion equations

[0035]

[0036]

[0037]

[0038]

[0039]

[0040] Among them, ψ is the relative burned volume of gunpowder, χ, λ and μ are characteristic quantities of gunpowder shape, χ s and lambda s is the gas production coefficient in the particle combustion stage, Z is the thickness of the propellant relative to the burnt powder, Z k is the relative thickness of the burn-off when the porous propellant particles are completely burnt out, is...

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Abstract

The invention discloses a density calculation method of plasmas in a gun barrel in a gunpowder combustion process. The density calculation method comprises the following steps: step 1, obtaining gun bore structure parameters and explosive filling parameters; step 2, establishing a gunpowder combustion equation set; step 3, solving the gunpowder combustion equation set; obtaining functions of p, l and phi relative to t by taking the t as an independent variable; step 4, calculating a gas temperature T: T=Sp(l+lphi) / omegaphiR, wherein R is a gas constant; and step 5, calculating a plasma density ne: ne=no / ni*(2mnokT)<1.5> / h<3>*2gi / g0exp(-eEi / kT), wherein Ei is an ionization potential of ions, go is a statistical weight of an atomic ground state, gi is a statistical weight of an ion ground state, me is the mass of electrons, ni is the ion density and no is the atom density. The density calculation method of the plasmas in the gun barrel in the gunpowder combustion process, disclosed by the invention, can accurately calculate the density of the plasmas in the gun barrel, and provides theoretical supports for the density of the plasmas in the gun barrel.

Description

technical field [0001] The invention relates to the technical field of plasma characteristic testing, in particular to a method for calculating plasma density in a gun barrel when gunpowder burns. Background technique [0002] The methods of plasma generation mainly include gas discharge method, ray irradiation method, photoionization method, laser plasma method, thermal ionization method, shock plasma and so on. Gas discharge includes corona discharge, glow discharge, arc discharge, dielectric barrier discharge, etc. There are many researches in this field. Thermal ionization refers to the ionization produced by inelastic collisions between atoms and other particles during thermal motion to obtain sufficient energy. There is little research in this area, only studies on the combustion of fossil fuels to generate plasma. The application of plasma in artillery is now limited to electrothermal chemical guns. The plasma in the electrothermal chemical gun is generated by a pl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 宋鹏毛保全李程钟孟春杨雨迎李华徐振辉白向华王艳峰冯帅李晓刚兰图
Owner ACADEMY OF ARMORED FORCES ENG PLA
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