| Citation: | Yang Ke, Gu Yefeng, Yang Yang, et al. Experimental study on low-temperature torch ignition performance of combustor[J]. Journal of Aerospace Power, 2026, 41（9）：20250144 doi: 10.13224/j.cnki.jasp.20250144
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This study examined the ignition performance and its influencing factors for a triple-header combustor employing torch ignition under low-temperature fuel conditions. A specialized low-temperature fuel delivery system was designed, and high-speed imaging techniques were utilized to capture the dynamic flame propagation process during ignition. Experimental investigations were conducted to analyze the effects of total pressure loss and air intake orifice size of the igniter on ignition characteristics. The results demonstrated that the ignition performance of the combustor deteriorated significantly under low-temperature fuel conditions. Under condition 1 and condition 3, successful ignition could not be achieved when the fuel supply rate of the starting nozzle reached 9 kg/h. Enlarging the air intake orifice area of the torch igniter and increasing the total pressure loss coefficient were found to enhance the ignition performance and extend the operational envelope of the engine. Furthermore, −35 ℃ low-temperature fuel substantially affected the flame propagation process to sectors distant from the igniter, markedly increasing the ignition delay time. The longest ignition completion time was 806 ms, while under normal-temperature fuel conditions, it could be reduced to 433 ms.
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