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Study on Dynamic Burning Rate Equation of Propellant
Author(s) -
Zhang Ruihua,
Rui Xiaoting,
Wang Yan,
Li Chao
Publication year - 2017
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.201700021
Subject(s) - propellant , muzzle velocity , muzzle , internal ballistics , mechanics , volumetric flow rate , flow (mathematics) , computer simulation , simulation , materials science , physics , projectile , aerospace engineering , engineering , composite material , barrel (horology) , metallurgy
Aiming at the difficulty that the actual burning law of propellant in the gun bore couldn't be described exactly by static burning rate equation in the closed‐bomb, propellant dynamic burning rate equation and its acquisition method were established in the paper, which are based on static burning rate equation and considering burning gas flow and loading density influence factors in bore. A numerical code for interior ballistic two‐phase flow was successfully developed. And corresponding firing tests were also carried out. The comparison of simulations with interior ballistic code and firing test results show that the propellant dynamic burning rate equation makes the maximum errors of muzzle velocity and pressure in breech decreased from 2.97 % to 0.75 % and from 6.68 % to 0.38 %, respectively. This method not only improves simulation precision of gun muzzle velocity and pressure significantly, but also provides a means to improve the design accuracy for interior ballistic performance.