Wide-working-range hydrogen fuel combustion chamber and working method thereof

The invention discloses a wide-working-range hydrogen fuel combustion chamber. The combustion chamber comprises a gaseous fuel rotational flow injector, wherein the gaseous fuel rotational flow injector comprises a first frustum, a second frustum, a connecting pipe and a fuel pipe; the second frustum is arranged in the first frustum and is coaxially arranged with the first frustum; the top of the second frustum is of a closed structure; a feeding cavity is formed between the connecting pipe and the first frustum; an air rotational flow hole penetrating to the bottom wall of the first frustum is formed in the side wall of the first frustum; a central flow channel is formed in the second frustum; a gaseous fuel rotational flow hole penetrating to the central flow channel is formed in the side wall of the second frustum; the connecting pipe is of a conical structure; one end of the connecting pipe is connected with the top of the first frustum; and the other end of the connecting pipe is communicated with the fu