含能材料2018，Vol.26Issue(3)：243-247,5.DOI:10.11943/j.issn.1006-9941.2018.03.007
考虑壁面滑移修正的硝基胍发射药流道内数值模拟
Numerical Simulation of Nitroguanidine Gun Propellant in Channel Considering Wall Slip Correction
摘要
Abstract
The wall slip is one of the important factors affecting the quality of gun propellant extrusion molding.To improve the accuracy of numerical simulation of the seven-hole nitroguanidine gun propellant extrusion molding,the wall slip mechanism of nitroguanidine gun propellant dough was studied,the mathematical model of gun propellant flow considering the wall slip correction was established.The finite element method was used to simulate the forming process of seven-hore nitroguanidine gun propellant.The pressure field,the velocity field and the velocity vector distribution at the junction of the segment and the forming section were compared and analyzed at cases whether considering the wall slip.The simulation was validated by the gun propellant extrusion test.Results show that the wall slip reduces the forming pressure of gun propellant and improves the uniformity of gun propellant exit rate,which is beneficial to the forming of gun propellant.The error between the actual size and the simulation size of the gun propellant is less than 2.0％ in which,the outer diameter error is 0.59％,and the outer arc error 0.36％,the inner arc error 1.80％,the aperture error 1.67％,and the center aperture error 1.72％.The simulation process is in line with the actual processing.关键词
硝基胍发射药/数值模拟/壁面滑移/压伸成型Key words
nitro guanidine propellant/numerical simulation/wall slip/extrusion molding分类
军事科技引用本文复制引用
朱春鸠,南风强,何卫东,沈万武..考虑壁面滑移修正的硝基胍发射药流道内数值模拟[J].含能材料,2018,26(3):243-247,5.基金项目
国防科工局基础产品创新计划(火炸药专项) （火炸药专项）
国防基础科研计划 （）
