摘要
针对压力和温度大范围变化条件下的高压空气弹射装置,基于改进的对应态维里方程,建立了内弹道模型。计算了改进的对应态方程的第二及第三维里系数,并以截断到第三维里系数的体积级数形式的维里方程为基础,推导了比热力学能及比焓的解析表达式,获得了动态的热力学参数。进行了数值求解,给出了高低压室的热力学参数变化规律、导弹过载系数及速度。数值实验表明:压缩因子达到1.107,高压室温度和压力的减小值大于理想减小值,高压空气的综合做功能力偏离理想气体,真实气体效应研究必不可少。
An interior ballistic model is established on the basis of modified corresponding virial equation for the high-pressure air ejection device under the wide variation conditions of pressure and temperature. The second and third virial coefficients of modified corresponding state equation are calculated. Based on the virial equation of volume series form which is truncated to the third virial coefficient, the analytical expressions of specific thermodynamic energy and specific enthalpy are presented, and the dynamic ther- modynamic parameters are obtained. The numerical experiments are performed. The changing rules of thermodynamic properties and missile acceleration and velocity are obtained. The results show that the compression factor reaches 1. 107, and both the actual decreased values of temperature and pressure are higher than the ideal decreased values in the hyperbaric chamber, and the work capability of hyperbaricair deviates from the ideal gas, and it is necessary to study real gas effects.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2013年第5期527-534,共8页
Acta Armamentarii
基金
国防基础科研项目(B2620110005)
关键词
兵器科学与技术
导弹弹射系统
内弹道
真实气体效应
维里系数
ordnance science and technology
missile ejection system
interior ballistic
real gaseffects
virial coefficient
