Experiments on Electrically Controlled Flameholding on a Plane Wall in Supersonic Airflow (POSTPRINT)

摘要

We describe experiments on gaseous fuel ignition and flameholding controlled by an electrical discharge in high speed airflow. The geometrical configuration does not include any mechanical or physical flameholder. The fuel is nonpremixed and injected directly into the air crossflow from the combustor bottom wall. A multi-electrode, nonuniform transversal electrical discharge is excited, also on the bottom wall, between flush-mounted electrodes. The initial gas temperature is lower than the value for autoignition of hydrogen and ethylene. Results are presented for a wide range of fuel mass flow rate and discharge power deposited into the flow. This coupling between the discharge and the flow presents a new type of flameholder over a plane wall for a high- speed combustor.