摘要
描述了液体工质电热化学发射系统中液体工质的内弹道过程，并建立了相应的数学模型、编制了计算程序，该模型用经验关系修正燃烧过程中Ｋｅｌｖｉｎ－Ｈｅｌｍｈｏｌｔｚ动力不稳定性的影响，可用于预测燃烧过程压力、弹丸行程的瞬时变化．结果表明液体工质电热化学发射过程中燃气压力存在双峰现象，第一个峰值出现在弹丸几乎尚未运动的时刻，与初始空腔体积以及初始等离子体射流有关；第二个峰值则是等离子体和工质分解的共同作用结果．另外，对影响燃烧过程的一些特性参数，如初始空腔体积、电能输入特性、工质燃烧速率、弹丸质量等作了分析，结果与国外参考文献提供的数据基本一致．
A theoretical model and computer code have been developed to describe the combustion processes in a liquid propellant electrothermal chemical launcher. The model, which takes into account the development of the Taylor cavity and the interaction between the plasma and the working fluids, predicts the transient variations of the gun chamber pressures, projectile motion and the gun muzzle velocity. The calculations show that the gun chamber pressures exist double peaks during the process. The first peak, which appears at the moment that the projectile hardly moves, is associated with the initial cavity and the initial discharge of the plasma jet, whereas the second peak is a result of both the discharge of plasma jet and the combustion of liquid propellant. The influences of initial Taylor cavity, input of plasma energy, coefficients of propellant decomposition rate and projectile masses on the combustion process have also been presented.
出处
《弹道学报》
EI
CSCD
北大核心
1997年第4期39-44,共6页
Journal of Ballistics
