Ignition Characteristics of Plasma Torch for Hydrogen Jet in an Airstream
Ignition Characteristics of Plasma Torch for Hydrogen Jet in an Airstream
复制标题
气流中氢气喷射等离子炬的点火特性
DOI：
10.2514/2.5587
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Katsura Ohwaki
中科院分区：
文献类型：
--
作者：
K. Takita;Tomokazu Uemoto;Takahiro Sato;Y. Ju;G. Masuya;Katsura Ohwaki
对平行于亚音速气流的氢气射流等离子体炬点火特性进行了实验研究。随着喷油器与等离子体炬之间距离的增加，喷油器点火位置区域逐渐变窄，随着气流速度的增加，喷油器点火位置区域急剧变窄。这表明点火极限强烈地依赖于等离子体炬的穿透高度，其与空气流速成反比。将氮气和氧气作为原料进行比较。结果表明，等离子体射流本身的行为，点火极限，和相同的形状没有差异。对H2/空气混合物中加入N和O自由基的点火延迟时间的计算表明，氧等离子体对H2/空气混合物的点火延迟时间具有相同的效果，且优于HandtheOH自由基，但氧等离子体对铜阳极喷嘴的破坏程度比氮更严重。
The ignition characteristics of a plasma torch for a hydrogen jet injected parallel to a subsonic aire ow were experimentally studied. Theregion of the injector position whereignition occurred became gradually narrow with an increase in the distance between the fuel injector and the plasma torch and steeply narrow with an increase in the aire ow velocity. This suggests that the ignition limit strongly depends on the penetration height of the plasma torch, which is in inverse proportion to aire ow velocity. Nitrogen and oxygen were compared as feed stocks. Results obtained showed no difference in the behavior of the plasma jet itself, the ignition limit, and the e ame shape. Calculations of ignition delay time for an H 2/air mixture with the addition of N and O radicals showed the sameeffectivenessand werefoundto besuperiorto theHandtheOHradicals.However,thedegreeofdeterioration of an anode nozzle made of copper was more severe for oxygen plasma than for nitrogen.