Initial testing of the wave-rotor constant-volume combustor (WRCVC) exhibited rapid deflagrative combustion of rich ethylene mixtures, with some evidence of ignition prior to alignment with ignition gas injector. Test data is analyzed to understand ignition and combustion behavior using a transient gas dynamics and combustion simulation code. Flow of hot gases from passages of the WRCVC and the ignition gas injector through the clearance gap between the rotor and the stationary end plates may be implicated as an occasional source of ignition. A representative test case is examined for a comprehensive discussion on ignition initiation location, ignition delay time, and flame propagation speed through the passages.
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