脉冲爆震燃烧效率的探索性试验研究
Preliminary experimental study of pulse detonation combustion efficiency
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摘要: 为了对脉冲爆震燃烧过程的燃烧效率有一个初步了解,在分析脉冲爆震发动机工作原理的基础上,设计了一套带有压力可调单向阀结构的取样系统,并进行了试验验证。试验针对爆震频率为5Hz、当量比为1的汽油和空气混气,测试了爆震波充分发展前后不同位置处爆震燃烧过程的燃烧效率,结果表明可以利用设计的取样系统进行脉冲爆震发动机燃烧效率的测量,试验还发现在脉冲爆震室后爆震发展比较充分的位置,测取的燃烧效率比较高,最高可达99.6%。Abstract: A sampling system with a variable pressure check valve was designed to investigate the combustion efficiency of pulse detonation combustion process on the basis of the pulse detonation engine(PDE) operating principle analysis.With the designed sampling system,the combustion efficiencies of the pulse detonation combustion processes using gasoline as fuel and compressed air as oxidizers at operating frequency of 5 Hz were measured both at conditions that the steady and fully developed detonation waves were formed and not formed.The experimental results indicate that the pulse detonation combustion efficiency can be measured successfully using the designed sampling system.The combustion efficiency where the detonation waves have fully developed is higher than that of not fully developed. The highest combustion efficiency is up to 99.6%.
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