Study on combustion process of ramjet combustor ignition

Tianyu Wang; Jinlu Yu; BingBing Zhao; Lei Zhang; Weida Cheng; Xinyao Tan

doi:10.1117/12.2638595

20 September 2022 Study on combustion process of ramjet combustor ignition

Tianyu Wang, Jinlu Yu, BingBing Zhao, Lei Zhang, Weida Cheng, Xinyao Tan

Proceedings Volume 12261, International Conference on Mechanical Design and Simulation (MDS 2022); 1226116 (2022) https://doi.org/10.1117/12.2638595
Event: Second International Conference on Mechanical Design and Simulation (MDS 2022), 2022, Wuhan, China

Abstract

In order to explore the ignition performance of ramjet combustor, based on the establishment of ramjet combustor model, the ignition process was numerically calculated by using numerical simulation method, and the flow field and flame development process in the combustor were analyzed. The results showed that a backflow zone could be formed behind the blunt body evaporative flame stabilizer in the ramjet combustion chamber. The air holes on the cyclone could lead to the separation of flame roots in the backflow zone, but did not affect the overall shape of the flame. After the igniter exits, the initial fire core expanded around and ignited the surrounding fuel mixture, making the temperature of the fire core drop from 2800K to 2000K; Compared with the normal ignition process, the increase of oxygen concentration could significantly increase the flame propagation velocity and flame temperature, and shorten the ignition delay time of the combustion chamber.

Citation Download Citation

Tianyu Wang, Jinlu Yu, BingBing Zhao, Lei Zhang, Weida Cheng, and Xinyao Tan "Study on combustion process of ramjet combustor ignition", Proc. SPIE 12261, International Conference on Mechanical Design and Simulation (MDS 2022), 1226116 (20 September 2022); https://doi.org/10.1117/12.2638595

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