Realization and modeling of continuous spin detonation of a hydrogen-oxygen mixture in flow-type combustors. 2. Combustors with expansion of the annular channel

Results of a comprehensive numerical and experimental study of continuous spin detonation of an H$_2$–O$_2$ mixture in flow-type annular combustors with channel expansion are presented. In these experiments, oxygen is supplied as a continuous flow through an annular slot, and hydrogen is injected through injectors. Combustion of hydrogen-oxygen mixtures in continuously rotating (spinning) and pulsed detonation waves with exhaustion of the products into an evacuated tank with increasing counterpressure and into the atmosphere was realized and studied in such combustors for the first time. The domain of realization of continuous detonation is determined. Verification of the mathematical model is performed on the basis of experimental results, and reasonable agreement is reached for the basic detonation parameters: structure of transverse detonation waves, their velocity, and pressures in the combustor and in the injection system.