Experimental study on propagation characteristics of rotating detonation wave of ethylene-rich gas
Using the fuel-rich gas produced by the combustion of ethylene and oxygen as fuel and air as the oxidant,the experimental research on the propagation characteristics of rotating detonation wave of ethylene-rich combustion gas was carried out.The propagation characteristics of rotating detonation wave and the influencing factors of propagation modes under different propagation modes were explored,and the time-frequency character-istics,propagation speed and initiation delay time under different modes were comparatively analyzed.The re-sults show that the propagation mode of the rotating detonation wave of ethylene-rich combustion gas and the working equivalence ratio interval are related to the primary combustion products.In the single-wave mode and the equivalence ratio of 0.67,the maximum propagation velocity of the detonation wave is 1 347.4 m/s.As air mass flow rate increases,propagation mode of ethylene-enriched gas rotating detonation wave develops into multi-wave mode.An increase in the number of detonation wave-heads will lead to a decrease in the propagation velocity of the detonation wave.The initiation delay time decreases with increasing air flow in the same propaga-tion mode.
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