升华能随温度和压力的变化及其对汽化反冲冲量的影响  

The Sublimation Energy versus Temperature and Pressure and Its Influence on Gasifying Blow-off Impulse

作　　者：汤文辉[1] 徐志宏[1] 牛锦超[1] 佘金虎[1] 

机构地区：[1]国防科技大学理学院技术物理研究所,湖南长沙410073

出　　处：《高压物理学报》2007年第4期342-346,共5页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(10672180);高等学校博士学科点专项科研基金(20059998005)

摘　　要：从普适的热力学原理出发,研究了升华能随温度和压力的变化。结果表明,升华能随温度或压力的增加而线性减小。采用光滑粒子流体动力学方法对金属铝在脉冲X射线辐照下的汽化反冲冲量进行了数值模拟,考察了升华能的变化对冲量的影响。结果表明,考虑升华能随温度和压力的变化后,冲量明显增加。The dependence of the sublimation energy on temperature and pressure was studied based on universal thermodynamics. The result shows that the sublimation energy decreases linearly with the increasing temperature or pressure. The blow-off impulse of aluminum induced by pulsed X-ray was simulated by smoothed particle hydrodynamics （SPH） method, and the influence of sublimation energy on impulse was discussed. In contrast to the situation that sublimation energy is a constant, the numerical result shows that the blow-off impulse of aluminum will increase obviously if the change of sublimation energy with temperature and pressure is considered.

关 键 词：升华能 汽化反冲 冲量 脉冲X射线 

分 类 号：O434.1[机械工程—光学工程]