PR方程和WS混合规则预测灭火瓶氮气充填量

发布时间：2018-04-22 09:39

本文选题：灭火系统 + Peng-obinson(PR)方程　；参考：《北京航空航天大学学报》2016年10期

【摘要】：氮气为直升机灭火瓶内灭火剂的快速释放提供驱动力,确定氮气充填量和气相空间氮气的摩尔比例,是直升机动力舱灭火系统设计中的关键问题之一。基于PengRobinson(PR)状态方程和Wong-Sandler(WS)混合规则,提出了一种灭火瓶氮气充填量预测方法,针对Halon301和HFC-227ea的不同充装工况,通过3层迭代计算确定氮气充填量,与试验和文献结果进行了对比,并分析了灭火瓶内压强和氮气摩尔比例随温度的变化情况。结果表明:对Halon1301充填1/2灭火瓶的试验工况,氮气充填量计算值的平均误差约为4.7%;对充填2/3试验工况,平均误差约为1.1%,计算结果优于PROFISSY和HFLOW软件计算结果。对HFC-227ea充填1/2灭火瓶和2/3灭火瓶工况的平均误差分别为4.3%和2.3%,与PROFISSY软件的计算精度相当。该方法可以用于机载灭火系统工程设计。
[Abstract]:Nitrogen is a driving force for the rapid release of fire extinguishing agent in a helicopter fire extinguisher. It is one of the key problems in the design of a helicopter power cabin fire extinguishing system to determine the amount of nitrogen filling and the molar ratio of gas phase space nitrogen. Based on the PengRobinson (PR) state equation and the Wong-Sandler (WS) mixing rule, a kind of nitrogen filling amount in fire extinguishing bottle is proposed. The prediction method, according to the different loading conditions of Halon301 and HFC-227ea, through 3 layer iterative calculation to determine the nitrogen filling amount, compared with the test and the literature results, and analyzed the pressure in the fire extinguisher and the change of the nitrogen molar ratio with the temperature. The results show that the test conditions of the Halon1301 filling 1/2 extinguisher and the nitrogen filling meter are the results. The average error of the calculated value is about 4.7%, the average error is about 1.1% for the filling 2/3 test, and the calculation results are better than the PROFISSY and HFLOW software. The average error of the HFC-227ea filling 1/2 fire extinguisher and the 2/3 extinguisher is 4.3% and 2.3% respectively, which is equivalent to the calculation precision of the PROFISSY software. This method can be used in the airborne fire extinguishing system. Engineering design.

【作者单位】：北京航空航天大学航空科学与工程学院;北京航空航天大学人机工效与环境控制重点学科实验室;中国空间技术研究院空间物理重点实验室;
【分类号】：V244.12

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