摘要
采用比容平移法修正原始的Peng-Robinson状态(VTPR)方程,提高三氟碘甲烷(CF_3I)液相饱和区密度的计算精度。基于VTPR方程,结合经典的范德瓦尔混合规则,计算了N_2作为增压介质时,CF_3I充填1/2灭火瓶和2/3灭火瓶所需的N_2质量,并与试验值和文献值进行对比。结果表明,不同充填工况的计算值与试验值基本吻合,并且优于PROFISSY软件的结果。获得了充填压力分别为2.5 MPa和4.2 MPa、CF_3I不同充填密度下的总压力与温度的关系式,并计算了灭火剂热膨胀充满灭火瓶的临界温度和临界压力,该压力-温度关系式可用于以CF_3I为灭火剂的机载灭火系统工程设计。
The volume translation method is used to correct the original Peng-Robinson state（VTPR）equation for representing the density of trifluoroiodomethane（CF_3I）in the saturated region.Based on VTPR equation associated with the classical van der Waals mixing rule,the mass of N_2 required to pressurize CF_3 I is calculated.For the case of filling one-half and two thirds of extinguisher,the results show that calculated mass of N_2 agrees well with the experimental data and it is better than the values of PROFISSY software.With different filling density of CF_3 I,the relationship of total pressure versus temperature is obtained when the super-pressurized pressure are 2.5MPa and 4.2MPa.Besides,the critical pressure and critical temperature are also acquired when the fire agent bottle is liquid-full.The relationship of pressure versus temperature for the agent of CF_3 I will help to design fire suppression system in aircraft.
作者
陈梦东
余建祖
谢永奇
CHEN Mengdong YU Jianzu XlE Yongqi(School of Aeronautic Science and Engineering, Beihang University, Beijing 100083, China)
出处
《航空学报》
EI
CAS
CSCD
北大核心
2016年第12期3706-3712,共7页
Acta Aeronautica et Astronautica Sinica
