Rotary detonation engine and ignition device thereof

According to the rotary detonation engine and the ignition device thereof, detonation waves in a main combustion chamber of the rotary detonation engine can be efficiently detonated, and the combustion efficiency of the main combustion chamber can be improved. The ignition device comprises a plurality of ignition tube devices, the ignition tube devices are installed on the main combustion chamber and arranged in the circumferential direction of the main combustion chamber at intervals, and the ignition tube devices are arranged to conduct synchronous ignition and detonation so as to input combustion airflow in the same rotation direction into the main combustion chamber, so that a self-propagating multi-detonation-wave structure can be formed in the main combustion chamber; and the combustion efficiency and the thrust-weight ratio of the rotary detonation engine can be improved. 一种旋转爆震发动机及其点火装置，可以高效起爆旋转爆震发动机的主燃烧室内的爆震波，有利于提高主燃烧室的燃烧效率。其中，点火装置包括：多个点火管装置，安装在主燃烧室上，并沿主燃烧室的周向间隔设置，且多个点火管装置设置成同步点火起爆以向主燃烧室输入旋转方向相同的燃烧气流