Flame stability limits and ignition delay time of the flameholder are experimentally studied in this work at the pressure of 0.03 – 0.06 MPa, Mach number of 0.1 – 0.3, and temperature of 320 K – 800 K. The results indicate that the reduction in equivalence ratios of lean ignition and blowout can be achieved by the increase in pressure or Mach number. Temperature rise will first increase and then decrease the lean ignition equivalence ratio. While increasing lean blowout equivalence ratio was observed with increasing temperature. The envelope of the stable combustion between the pressure and Mach number is measured, and the lowest temperature of successful ignition is 300 K, acquired at Mach 0.1 and 0.06 MPa. Besides, the correlation between the equivalence ratios of flame stability and inlet parameters, such as pressure, Mach number, temperature, is developed. The ignition process of the flameholder is imaged, and the ignition delay time decreases with increased pressure or temperature. The ignition delay time is shown first to decrease and then increase with the increase in Mach number.

在0.03 – 0.06 MPa的压力，0.1 – 0.3的马赫数和320 K – 800 K的温度下，通过实验研究了火焰保持器的火焰稳定性极限和点火延迟时间。结果表明，当量比降低压力或马赫数的增加可实现稀薄点火和爆裂。温度升高将首先增加，然后降低稀薄点火当量比。随着温度的升高，观察到贫燃吹出当量比增加。测量在压力和马赫数之间的稳定燃烧的包络线，成功点火的最低温度为300 K，在0.1和0.06 MPa时获得。此外，火焰稳定性当量比与入口参数（例如压力，马赫数，温度，被开发。火焰保持器的点火过程被成像，并且点火延迟时间随着压力或温度的升高而减少。如图所示，点火延迟时间先减小，然后随着马赫数的增加而增加。