中文摘要：

为了考察一溴三氟丙烯（简称BTP）与氮气（N2）所形成的复合灭火介质的复合比以及不同复合比下的临界灭火条件，开展了以下工作：首先，基于多组分分压原理，探讨了BTP-N2预混技术的可行性；其次，基于燃烧学和气体运动学理论，提出了BTP与N2复合灭火介质的灭火临界条件预测理论模型；再次，依据卤代烷灭火介质的特点和灭火机理，构建了临界灭火试验平台，对不同BTP和N2复合比下的复合气体灭火介质进行灭火临界条件研究；最后，通过实验结果修正和完善预测理论模型。结论：BTP-N2复合灭火介质的灭火临界条件理论值与实验值吻合性较好，因此该预测模型能很好地对复合卤烃灭火介质的临界灭火条件进行估算，为研究卤烃气体与惰性气体复合灭火介质的灭火机理及研发高效清洁灭火介质奠定了基础。

英文摘要：

We investigate the fire-extinguishing concentration of binary blends agents of different ratio of 1-bromo-3,3,3-trifluoropropene and nitrogen. Firstly, feasibility of the premixed technical was discussed based on the principle of multi-component partial pressure. Secondly, a prediction theory model was proposed based on combustion theory and aerodynamics theory. Thirdly, a fire-extinguishing concentration test platform was employed to determine the fire-extinguishing concentration of binary blends agents of 1-bromcr3,3,3-trifluoropropene and nitrogen with different ratios. In the last, reliability of a prediction theory model was determined by comparison with experimental concentration and theoretical concentration. Conclusion： experimental concentration yields a good linear correlation with measured theory, which shows that this prediction theory model can forecast for different ration of binary blends agents of 1-bromo-3,3,3-trifluoropropene and nitrogen. It provides a foundation for development of efficient and clean fire-extinguishing agents and mechanism research of premixed technology with halocarbons gas and inert gas.