Tiangang LUO, Jiajian ZHU, Mingbo SUN, Yifu TIAN, Minggang WAN, Yongchao SUN

DOI Number: XXX-YYY-ZZZ

Conference number: HiSST 2024- 0070

The ignition enhancement process of kerosene in a scramjet combustor by multi-channel gliding arc (MCGA) plasma was carried out under a Mach number of 2.5, a total temperature of 1600 K, and a total pressure of 1.65 MPa. The CH* images of the side and top of the combustor, the schlieren images in streamwise, and the discharge current and voltage waveform of MCGA plasma were collected simultaneously. The ignition process of kerosene fuel enhanced by MCGA plasma under different global equivalent ratios (GERs) is studied, and the enhanced ignition characteristics of MCGA plasma near the blowout limit are analyzed. The experimental results show that MCGA plasma can achieve the repeatable enhanced ignition and stable combustion of kerosene fuel in the scramjet combustor with GER from 0.19–0.46. The continuous discharge of MCGA plasma makes the flame kernel continuously generated, which has a certain maintenance effect on the flame near the blowout limit. The multi-dimensional continuous discharge of MCGA plasma causes the heat and active components to accumulate near the leading edge of cavity (LEC), which accelerates the ignition process.

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In Categories: 1.Events, HiSST 2024, Propulsion Systems and Components
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