论文部分内容阅读
针对液相控制条件下航空煤油火焰蔓延的驰豫脉动特性,借助CCD摄像和幅频分析技术,对航空煤油火蔓延速度、驰豫脉动模式、脉动频率和脉动幅值等特性进行了实验研究.对航空煤油火焰驰豫脉动蔓延产生机理进行了分析,分析结果表明,在液相控制条件下,前展-回缩-前展-回缩是航空煤油火焰驰豫脉动的主要模式,火焰蔓延平均速度与(T0-Tc)/Tc的2.16次方呈正比关系.主火焰蔓延脉动频率和闪火焰脉动幅值随燃料初始温度升高而增大,初始温度T0高于闪点时,脉动频率与(T0-Tc)/Tc呈正比关系,T0低于闪点时,脉动频率与(1+(T0-Tc)/Tc)的0.53次方呈正比关系.
Aiming at the relaxation and pulsation characteristics of aviation kerosene flame spread under the condition of liquid phase control, the characteristics of aviation kerosene fire spread speed, relaxation pulsation mode, pulsation frequency and pulsation amplitude were experimentally studied with CCD camera and amplitude-frequency analysis technology. The mechanism of aviation kerosene flame relaxation pulse propagation is analyzed. The results show that under the condition of liquid phase control, foreshortening - recoil - forewarning - recoiling is the main mode of aero kerosene flame relaxation pulsation, the average flame spread (T0-Tc) / Tc is proportional to 2.16.The square of the main flame propagation pulse frequency and flash flame pulsation amplitude increase with the increase of the initial temperature of the fuel, while the initial temperature T0 is higher than the flash point, the pulsation frequency and (T0-Tc) / Tc is proportional to the relationship, when the T0 is lower than the flash point, the pulsation frequency is proportional to the 0.53 power of (1+ (T0-Tc) / Tc)