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借助凹腔火焰稳定器模型的数值计算结果研究了高总焓超声速流条件下凹腔火焰稳定器回流区中可能存在的稳焰机制。研究表明,高总焓来流条件下凹腔火焰稳定器回流区中至少存在着三种稳焰机制:回流区燃烧机制、回流区点燃机制和回流区整流机制。三种稳焰机制分别利用了高焓来流条件下回流区的三种不同特性:回流区燃烧机制利用了回流区的混合特性;回流区点燃机制利用了回流区的高温特性;回流区整流机制利用了回流区的阻流特性。计算结果表明,三种稳焰机制都有可能成为凹腔火焰稳定器回流区中起主导作用的稳焰机制。
Based on the numerical results of the cavity flame stabilizer model, the possible steady flame mechanism in the recirculation zone of the cavity flame stabilizer under high total enthalpy supersonic flow conditions was studied. The results show that there are at least three stable flame mechanisms in the recirculation zone of the cavity flame stabilizer under high total enthalpy flow conditions: combustion mechanism of recirculation zone, ignition mechanism of recirculation zone and recirculation zone recirculation mechanism. The three steady-flame mechanisms respectively utilize three different characteristics of the recirculation zone under high enthalpy flow conditions: the recirculation zone combustion mechanism utilizes the mixing characteristics of the recirculation zone; the recirculation zone ignition mechanism utilizes the high temperature characteristics of the recirculation zone; the recirculation zone recirculation mechanism Utilizes the choke characteristic of the recirculation zone. The calculated results show that the three stable flame mechanisms are likely to become the steady flame mechanism that plays a leading role in the recirculation zone of the cavity flame stabilizer.