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- W4281728403 endingPage "124723" @default.
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- W4281728403 abstract "Multi-channel ignition by nanosecond surface dielectric barrier discharge (nSDBD) offers potential for efficiency boost in spark ignition engines. In this paper, transient repetitive nSDBD ignition is proposed using a simple pulse forming circuit to make multi-channel ignition more feasible, considering that nSDBD can be enhanced by high frequency pulses and that convenient discharge energy control can be achieved by adjusting pulse number. Ignition experiments for propane/air mixtures were carried out in a constant volume combustion chamber under stoichiometric conditions at ambient initial temperature and pressure. Discharge channel transformation and flame propagation were captured by a high-speed camera. For 20 kHz negative pulses, discharge energy rose from 4 mJ to 8 mJ as pulse number increases from 1 to 12, and filaments grew from 2 mm to 12 mm. Partially overlapping filaments formed a tree-like discharge pattern with divergent roots and a concentrated middle part. Multiple flame kernels were generated in the middle region of the filaments and then greatly promoted by subsequent discharges, resulting in a petaloid flame. Ignition probability has been tested and the minimum ignition energy of repetitive nSDBD is obtained. The influence of discharge energy on flame propagation speed and combustion characteristics were analyzed." @default.
- W4281728403 created "2022-06-13" @default.
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- W4281728403 date "2022-09-01" @default.
- W4281728403 modified "2023-10-16" @default.
- W4281728403 title "Experimental study on multi-channel ignition of propane-air by transient repetitive nanosecond surface dielectric barrier discharge" @default.
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- W4281728403 doi "https://doi.org/10.1016/j.fuel.2022.124723" @default.
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