Self-driven wave rotor keeps the rotor rotating with the driving force of flow,so that it significantly simplifies the structure and enhance the reliability of wave rotor engines.This work numerically investigated the effect of flow phenomena on the tangential driving force on the rotor channels with different channel geometries.Results showed that a shock wave or an expansion wave inclined in a cambered channel.It induces difference in pressure between the upper and lower sidewalls of a channel.The positive pressure difference accelerates in multiple channels,and it forms a positive tangential driving force that enables the wave rotor to rotate by itself.
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