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ISSN Druckformat: 1948-2590
ISSN Online: 1948-2604
INVESTIGATION OF HIGH-TEMPERATURE ZONES FORMED IN SUPERSONIC AIR FLOW WHEN INJECTING COMBUSTION GASES AND OXYGEN IN LONGITUDINAL DISCHARGES
ABSTRAKT
The results of investigations of high-temperature zones that appear in supersonic air flow at M = 2, static pressure in the range of 2.94−4.9 × 104 ( ~ Pa 220−367 Torr), and discharge currents of 1.5 and 1.8 A when injecting propane, ethylene, and hydrogen along with oxygen into the discharge zone are presented. The discharge was produced by two types of modules. The design of the modules was such that the aforementioned components were injected through a module anode placed upstream. The discharge was carried by the supersonic flow and closed mainly at the cathode placed downstream. Data on the composition of radiative products that arose in the air-fuel mixture conversion processes in the discharge and their spatial distributions were obtained by spectroscopic methods. A modification of the emissive spectroscopy method was applied for contactless determination of the hot flow temperature in the plasma-chemical reaction area. For a series of cases, the relationship between the temperature value, the discharge-forming conditions, and the excess injected oxygen coefficient was determined.
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