微波增强滑移电弧等离子体辅助超声速燃烧

doi:10.7527/S1000-6893.2019.23345

Abstract

Abstract: To study the effect of microwave enhanced gliding arc plasma on supersonic combustion, an experiment is carried out on a direct-connected scramjet facility that has installed microwave and gliding arc structures. A single-stage cavity is used as flame stabilizer. The inlet Mach number of combustor is 2.5. The room temperature ethylene is injected perpendicular from the combustor wall, the gliding arc electrode is set in front of fuel jet point, and 2.45 GHz microwave is fed into scramjet in the opposite side of the cavity. The results show that the gliding arc in the scramjet combustor also follows the periodic characteristics of discharge and expansion. Due to the extremely high airflow rate, the gliding arc period is approximately 125 kHz. The plasma causes the pre-combustion shock train of the combustor to move forward, and the initial and stable position of the flame is transferred from the cavity shear layer to the front of the fuel jet, and the supersonic flame rate is increased. Compared with a single microwave or the gliding arc plasma method, the combination of microwave and gliding arc can achieve high power microwave equivalent effect at a lower energy consumption. The study concludes that the microwave enhanced gliding arc plasma can stabilize the supersonic combustion.

Key words: scramjet, supersonic combustion, plasma assisted combustion, gliding arc, microwave

CLC Number:

V434⁺.3

MENG Yu, GU Hongbin, SUN Wenming, ZHANG Xinyu. Microwave enhanced gliding arc plasma assisted supersonic combustion[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020, 41(2): 123345-123345.

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Microwave enhanced gliding arc plasma assisted supersonic combustion

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