This paper deals with the investigations of a low-current glow-type discharge in air flow as applied to the problem of nitrogen oxide production. The electrode configurations correspond to the classical coaxial plasmatron and to the so-called gliding arc. The discharge burns in a regime of constricted positive column with a typical current density from 47 to 120 A/cm² and with the related electron density from 0.53⋅10¹⁴ to 2.3⋅10¹⁴ 1/cm³. The gas temperature changes from 3000 to 3610 K. The described conditions provide a flow of NO molecules from the plasma column with the energetic cost for production of one molecule of (30–50) eV. Maximum content of NO molecules [NO] = 4 g/m³ (3500 ppm) was obtained. In spite of a rather high gas temperature, the plasma is still nonequilibrium. The high vibrational levels of the nitrogen molecules are populated, and the main channel of the nitric oxide production is associated with the reaction in which the vibrationally excited nitrogen interacts with atomic oxygen.

本文探讨了气流中的低电流辉光型放电，用于解决氮氧化物的产生问题。电极配置对应于经典的同轴等离子管和所谓的滑动弧。放电在收缩正柱状态下燃烧，典型电流密度为 47 至 120 A/cm ²，相关电子密度为 0.53· ^{10 14}至 2.3· ^{10 14} 1/cm ³。气体温度从 3000 变为 3610 K。所描述的条件提供了来自等离子体柱的 NO 分子流，其能量成本为生产一个 (30-50) eV 的分子。NO分子的最大含量[NO] = 4 g/m ³(3500 ppm) 得到。尽管气体温度相当高，但等离子体仍然是非平衡的。氮分子的高振动水平被填充，一氧化氮产生的主要通道与振动激发的氮与原子氧相互作用的反应有关。