Hybrid microwave-direct current discharge in high speed flowsстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 1 октября 2025 г.
Аннотация:The hybrid microwave (MW) - direct current (DC) discharge in high-speed 50–250 m/s gas flows at pressures close to atmospheric is investigated. It is created by crossing a DC discharge (currents of 1–15 A) with a 2.45 GHz MW beam. Its spatial structure was studied using highspeed camera. The dependences of the electric field in the plasma channel and the quasi-frequency of the discharge on the flow velocity andcurrent were also obtained. The electron number density of 10 15 cm3 and the gas temperature of 6000 – 9000 K were determined usingoptical emission spectroscopy. The effects of the thickness of the skin layer and the polarization direction of the MW relative to the velocityvector of the flow are shown. The hybrid discharge makes it possible to initiate and maintain the combustion of high-speed propane-air flow.Near infrared visible (NIR-VIS) emission spectra of the discharge in an ignited propane-air flow are obtained and analyzed.