### 基于VTPR方程计算N2/CF3I充填特性

1. 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

1. 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

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.