Abstract
In view of the scarcity of engine structure in the power micro electromechanical systems(Power MEMS),an assumption of micro rotation stamping engine is presented according to the concept of rotating ramjet.The structure and principle of micro turbine engine developed by MIT are analyzed and the structures of centrifugal and centripetal rotating ramjets are put forward.By the cold-state simulation and computation of non-reactive flow field in the rotor with a radius of 5 mm,the max pressure in the centripetal rotating ramjet rotor is about 3.6 MPa at the edge speed of 510 m/s.And it can preliminarily meet the running requirement of ramjet.The relative speed of airflow of tangential nozzle is about 630 m/s and can meet the requirement of output power of the engine.The speed distribution of non-reactive flow shows that the relative speed of airflow in the rotor is lower than 60 m/s and the axial velocity can be from several to a dozen of meters per second.And it is good for combustion optimization and for ensuring the residence time of fuel.Finally,the comprehensive influences of circumferential velocity,peak gas temperature and rotor dimensions on the rotating ramjet engine performance are discussed.
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