Ignition and Flamehold by Direct Arcs in Supersonic Streams

利用直接暴露在气流中的直流电弧灭弧器进行了超音速空气流场中的点火和燃烧实验。电弧是在安装在燃烧室壁上的两个电极之间产生的，并被几种气体推出。结果表明，对于超音速气流中M=2.0附近的甲烷或甲烷/氢混合气体的点火，从有效性和实用性的角度来看，空气或氧气似乎比Ar、N或He作为电极提供的载气更合适。

Experiments of ignition and combustion in supersonic air flow field have been carried out by means of dc arc dischrges exposed directly in the flows. The arcs are produced between two electrodes mounted in the combustion chamber wall and pushed out by several kind of gases. The work showed that air or oxygen seemed to be more appropriate than argon, nitrogen or helium as the carrier gas supplied at the electrodes, from view points of effectiveness and practical use for the ignition of methane or methane/hydrogen mixture gas in supersonic air flows around M=2.0.