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Thermochemical Computations on Propellant Powder Gases at interior ballistic pressures and temperatures
Author(s) -
Dürschner M. G.
Publication year - 1976
Publication title -
propellants, explosives, pyrotechnics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.56
H-Index - 65
eISSN - 1521-4087
pISSN - 0721-3115
DOI - 10.1002/prep.19760010404
Subject(s) - equation of state , virial theorem , adiabatic process , thermodynamics , virial coefficient , enthalpy , real gas , propellant , chemistry , physics , organic chemistry , quantum mechanics , galaxy
The interaction of powder gas molecules in the interior ballistic pressure and temperature range does not allow the application of the Nobel‐Abel equation of state. An equation of state which correlates the thermodynamic variables pressure, specific volume, and temperature, and which meets to a high extent the physical facts, is the virial equation. Using an additive combined theorem for the virial coefficients, the equations for equilibrium in a chemically reacting gas composition without solid phase are derived by virtue of the virial equation as an equation of state. The internal energy and the enthalpy of the powder gases are given for the computation of the explosion temperature and the adiabatic flame temperature. For a numerical solution of this non‐linear system of equations, a combination of the gradient process and the Newton‐Raphson process (Such‐Weg‐Verfahren) is applied. Furthermore, the numerical results for different propellant powders are stated and discussed.