COMPOSITE APPARATUS WITH CONTRA-ROTATING TURBINES AND ENGINE SYSTEM INCLUDING SAME

摘要

Disclosed is a composite apparatus with contra-rotating turbines (100), comprising a charging turbine (1) and a power turbine (2). The power turbine (2) and the charging turbine (1) are coupled and the axes of rotation of the power turbine (2) and the charging turbine (1) are the same but the rotational direction is reversed. The inlet angle of a rotor blade of the power turbine (2) is made to match the outlet angle of a blade of the charging turbine (1) so that the gas stream from the outlet of the charging turbine (1) directly enters the rotor of the power turbine (2) at a predetermined angle to act thereupon. Moreover, further disclosed is an engine system (200) comprising the composite apparatus with contra-rotating turbines (100). Guide blades between the charging turbine (1) and the power turbine (2) are removed in the composite apparatus with contra-rotating turbines (100), making the structure denser and avoiding flow loss caused by guide blades.