基于VTPR方程计算N2/CF3I充填特性

doi:10.7527/S1000-6893.2016.0062

流体力学与飞行力学

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基于VTPR方程计算N₂/CF₃I充填特性

陈梦东, 余建祖, 谢永奇

北京航空航天大学航空科学与工程学院, 北京 100083

收稿日期:2016-01-08 修回日期:2016-03-02 出版日期:2016-12-15 发布日期:2016-03-04
通讯作者: 余建祖,Tel.:010-82338952,E-mail:yjz@buaa.edu.cn E-mail:yjz@buaa.edu.cn
作者简介:陈梦东,男,博士研究生。主要研究方向:直升机灭火系统设计。Tel.:010-82338081,E-mail:buaacmd@163.com;余建祖,男,教授,博士生导师。主要研究方向:先进电子设备热设计。Tel.:010-82338952,E-mail:yjz@buaa.edu.cn

Calculating filling properties for N₂/CF₃I based on volume translation Peng-Robinson equation

CHEN Mengdong, YU Jianzu, XIE Yongqi

School of Aeronautic Science and Engineering, Beihang University, Beijing 100083, China

Received:2016-01-08 Revised:2016-03-02 Online:2016-12-15 Published:2016-03-04

摘要/Abstract

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（CF₃I）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N₂作为增压介质时，CF₃I充填1/2灭火瓶和2/3灭火瓶所需的N₂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、CF₃I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CF₃I为灭火剂的机载灭火系统工程设计。

关键词: 灭火瓶, VTPR方程, 三氟碘甲烷(CF₃I), 气液平衡, 充填特性

Abstract:

The volume translation method is used to correct the original Peng-Robinson state (VTPR) equation for representing the density of trifluoroiodomethane (CF₃I) in the saturated region. Based on VTPR equation associated with the classical van der Waals mixing rule, the mass of N₂ required to pressurize CF₃I is calculated. For the case of filling one-half and two thirds of extinguisher, the results show that calculated mass of N₂ agrees well with the experimental data and it is better than the values of PROFISSY software. With different filling density of CF₃I, the relationship of total pressure versus temperature is obtained when the super-pressurized pressure are 2.5 MPa and 4.2 MPa. 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 CF₃I will help to design fire suppression system in aircraft.

Key words: fire extinguisher, VTPR equation, trifluoroiodomethane (CF₃I), vapor liquid equilibria, filling properties

中图分类号:

V228.6

陈梦东, 余建祖, 谢永奇. 基于VTPR方程计算N₂/CF₃I充填特性[J]. 航空学报, 2016, 37(12): 3706-3712.

CHEN Mengdong, YU Jianzu, XIE Yongqi. Calculating filling properties for N₂/CF₃I based on volume translation Peng-Robinson equation[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016, 37(12): 3706-3712.

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基于VTPR方程计算N₂/CF₃I充填特性

Calculating filling properties for N₂/CF₃I based on volume translation Peng-Robinson equation

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