初始温度对氢-空气预混诱导湍流燃烧特性的影响

通过在火焰传播路径上布置孔板实现诱导湍流燃烧,利用纹影技术和压力采集系统研究了初始温度对孔板诱导氢-空气预混湍流燃烧特性的影响。试验结果表明:穿越孔板前火焰传播速度略有下降,穿越孔板后火焰被诱导为湍流燃烧,火焰发展进程加快;随着初始温度的升高,最高燃烧压力和最大压升率减少,两者出现的时刻提前,添加孔板后的燃烧持续期变化率降低,但穿越孔板后的火焰传播速度的差异不显著。

Effects of Initial Temperatures on Induced Turbulence Combustion Characteristics of Pre Mixed Hydrogen-Air

The turbulence combustion was induced by arranginga orifice plate on the flame propagation path. The effect of initial temperature on induced turbulence combustion characteristics of pre mixture hydrogen air was studied by the high speed schlieren photograph system and pressure data acquisition system. The experimental results show that the flame spreads down slightly before the flame passes through the orifice plate, and then is induced into turbulent combustion which accelerates the flame development maximum pressure rise rate decrease in advance, and the change rate of the combustion duration reduces after the addition of the orifice plate, but there is no significant difference in the flame propagation speed after the flame passes through the orifice plate.