The Ignition of H2-O2-O3/H2-O2-O3-Ar Mixture Flows by the Photolysis of Ozone.

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  • オゾンの光解離反応によるＨ２‐Ｏ２‐Ｏ３／Ｈ２‐Ｏ２‐Ｏ３‐Ａｒ混合気流の着火
  • オゾン ノ ヒカリ カイリ ハンノウ ニヨル H2-O2-O3 H2-O2-O

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Abstract

A series of experiments about the ignition of H2-O2-O3/H2-O2-O3-Ar mixtures with KrF excimer laser has been carried out. We invesitigated the influences of some factors upon the Minimum Incident Laser Energy Intensity (MILEI) for the ignition, and took the schlieren photographs with a high speed camera to observe the photolysis and the ignition process. The results of these works showed that ozone was only a considerable absorber for the focused laser light and suggested that the photolysis of ozone induced the ignition. In our experimental range, the MILEI decreased with the increase of concentration of ozone, dilution with argon and preheat of mixture flow. However, a weak dependence of MILEI on the equivalence ratio of H2-O2-O3 mixtures was measured. From the schlieren photographs, we observed the rapid growth of initial ignition kernel and the formation of shock wave. These observations suggested that the ignition process was quite faster than the one induced by photolysis of O2 with ArF laser.

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