Research on continuous rotating detonation wave propagation process(I): one direction mode

Through changing the mass flow rates of air and hydrogen, H2/Air continuous rotating detonation wave has been realized in a wide range of test conditions. Based on the PCB and observation results, the detonation wave propagation process of one-direction rotating mode has been analyzed. For this rotating mode, the number of detonation waves is mainly influenced by the total mass flow rate of the propellant, and all the detonation waves propagate along the same direction at the same time. There are three kinds of propagation mode: one-wave, two-wave and hybrid one/two wave, which have their corresponding test condition domains. The detonation wave propagation frequency of one-wave and two-wave mode are in the ranges of 5.05~5.8 kHz and 8.6~9.9 kHz respectively, with the mean rotating velocity of 1510~1735m/s and 1280~1480m/s, respectively. For the hybrid one/two wave mode, the number of detonation waves changes during the test process. When the test condition locates in the middle of the condition domains of one-wave and two-wave modes, the detonation wave propagates stably. Otherwise, the propagation direction may change during the test process.