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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．
The interior ballistic process of liquid working fluid in liquid working substance electro-thermochemical chemical injection system is described. The corresponding mathematical model is established and the calculation program is compiled. The model corrects the influence of Kelvin-Helmholtz dynamic instability in combustion process by empirical relationship, Can be used to predict the combustion process pressure, the instantaneous change of projectile travel. The results show that there exists bimodal gas pressure during the liquid-phase electrothermal chemical vapor deposition. The first peak appears at the moment when the projectile is almost motionless, which is related to the initial cavity volume and the initial plasma jet. The second peak is the plasma And the working fluid decomposition of the joint results. In addition, some characteristic parameters that affect the combustion process, such as initial cavity volume, power input characteristics, burn rate of projectile and projectile mass, were analyzed. The results are consistent with the data provided by foreign references.