为了研究燃油流量对防火试验火焰特征的影响,为防火试验方案的设计提供参考和指导,采用Ansys Fluent软件对Nex Gen燃烧器进行三维定常数值模拟,分析了不同燃油流量条件下的火焰特征。结果表明:燃油流量对火焰最高温度和火焰形状几乎没有影响,但对火焰长度、监测面上温度分布、7个测量点的平均温度和热流密度有很大影响,通过分析各燃油流量条件下的火焰特征,发现当空气流量为35.8 g/s时,燃油流量在2.0~2.11 g/s——即余气系数为1.15~1.22时,能够用于防火试验。 In order to study the influence of fuel flow on the flame characteristics of fire test and to provide reference and guidance for the design of fire test program, three-dimensional numerical simulation of Nex Gen burners was carried out by Ansys Fluent software and the flame characteristics under different fuel flow rates were analyzed. The results show that the fuel flow has little effect on the maximum flame temperature and flame shape, but it has a great influence on the flame length, the temperature distribution on the monitoring surface, the average temperature and the heat flux at the seven measuring points. Flame characteristics and found that when the air flow rate of 35.8 g / s, the fuel flow at 2.0 ~ 2.11 g / s - the residual gas coefficient of 1.15 to 1.22, can be used for fire tests.