Ignition characteristics of a high-energy jet plasma igniter in an aeroengine afterburner

IF 6.7 2区工程技术 Q1 ENGINEERING, AEROSPACE

Propulsion and Power Research Pub Date : 2026-06-01 Epub Date: 2026-07-02 DOI:10.1016/j.jppr.2026.06.001

Jinlu Yu, Guangxia Chen, Lei Zhang, Zhankai Kang, Luyun Jiang, Yang Yu, Xiangyu Zhu, Gaofeng Wang

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Abstract

With the increasing thrust-to-weight ratio demands of modern aeroengines, afterburner ignition performance requirements have become more stringent. To broaden the ignition boundary and enhance ignition capability under extreme conditions, a high-energy jet plasma igniter was developed and its ignition characteristics examined. Analysis focused on the ignition process, ignition delay, and ignition boundary. Results confirmed a two-stage ignition process: the self-ignition process of the igniter and the process of igniting the fuel-air mixture in the afterburner with the jet flame of the igniter. The durations of these stages constitute the total ignition delay. The experimental results show that the igniter has a wide working range and can successfully ignite between 0.63 and 16.91 excess air coefficient, covering the inlet velocity of the combustion chamber from 5.56 to 52.78 m/s. At T_in = 293 K and W_in = 1000 m³/h, the ignition delay time in the second stage ranged from a minimum of 100.26 ms to a maximum of 314.99 ms. These results verified the significant advantages of the high-energy jet plasma igniter in effectively expanding the ignition boundary and improving ignition reliability.

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航空发动机加力燃烧室高能射流等离子点火器的点火特性

随着现代航空发动机推重比要求的不断提高，对加力燃烧室点火性能的要求也越来越严格。为了拓宽点火边界，提高极端条件下的点火能力，研制了一种高能射流等离子点火器，并对其点火特性进行了研究。重点分析了点火过程、点火延迟和点火边界。结果证实了两阶段点火过程：点火器的自燃过程和用点火器的喷射火焰点燃加力燃烧室中燃料-空气混合物的过程。这些阶段的持续时间构成点火总延迟时间。实验结果表明，该点火器工作范围广，能在0.63 ~ 16.91的过量空气系数范围内成功点燃，覆盖了5.56 ~ 52.78 m/s的燃烧室入口速度范围。在Tin = 293 K, Win = 1000 m3/h条件下，第二级点火延迟时间最小为100.26 ms，最大为314.99 ms。这些结果验证了高能射流等离子点火器在有效扩大点火边界和提高点火可靠性方面的显著优势。

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来源期刊

Propulsion and Power Research Multiple-

CiteScore

7.50

自引率

5.70%

发文量

期刊介绍： Propulsion and Power Research is a peer reviewed scientific journal in English established in 2012. The Journals publishes high quality original research articles and general reviews in fundamental research aspects of aeronautics/astronautics propulsion and power engineering, including, but not limited to, system, fluid mechanics, heat transfer, combustion, vibration and acoustics, solid mechanics and dynamics, control and so on. The journal serves as a platform for academic exchange by experts, scholars and researchers in these fields.