Abstract: The principle, means and measurement systems for multi-parameter combustion diagnostics by tunable diode laser-based absorption were extensively overviewed and applied to the measurements of fuel and oxygen concentration in the unburned mixture in pulse detonation chamber. Because fuel distribution in detonation chamber governs the performance of pulse detonation engine (PDE) , some controlled fueling experiments were designed to test the effect of partial tube fills on PDE performance. It was demonstrated in these PDE experiments that the diagnostics is rapid and useful. The demonstration proves the utility of the technique for monitoring PDE performance and further, for PDE control and optimization.

Key words: Diode laser;Infrared absorption+;Combustion diagnostics+;Pulsejet engine

摘要： 为了发展先进的燃烧诊断技术,对可调二极管激光红外吸收术用于燃烧多参数测量的原理、方法和测量系统进行了全面的论述,并将该方法应用于脉冲爆震室中未燃组分、当量比的测量中。因为爆震室中燃料的分布和填充程度决定了脉冲爆震发动机(PDE)的性能,故试验中精心控制燃料填充程度,以研究爆震管中填充程度对脉冲爆震发动机性能的影响。实验结果表明,可调二极管激光红外吸收术对于监测PDE的性能,进而对PDE的控制和优化极有意义。

关键词: 二极管激光器;红外吸收术~+;燃烧诊断~+;脉冲式喷气发动机