Ignition of a Supersonic Jet of a Premixed Fuel-Air Mixture in a Supersonic Airflow Using an Electric Discharge
R. S. Troshkin, L. S. Volkov, A. A. Firsov
Joint Institute for High Temperatures RAS, Moscow, Russia
Keywords: plasma-assisted combustion, supersonic flow, numerical simulation, experiment, direct-current discharge
Abstract
The concept of plasma-assisted combustion, which offers several advantages (reduced ignition delay, improved mixing, and stabilization of the flame front), is considered. The paper presents the results of a study of ignition by means of a longitudinal direct-current discharge of a fuel-air mixture injected at supersonic speed into the core of a supersonic airflow. To eliminate the effect of mixing, the fuel (ethylene) was premixed with the oxidizer (air). The design of the ethylene-air mixing system and the injection system of the resulting mixture into the test-section channel is described. For this configuration, results of gas-flow modeling using the FlowVision software package and experimental results on fuel ignition in a supersonic flow are presented.
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