高圧チップタービン駆動ファン

概要

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A new concept turbofan engine based on the idea of the "Separated Core Ultrahigh Bypass Engine" for small light aircraft and VTOL airplanes are presented. The concept engine called "Cluster Fan Engine" comprises two subunits, core engines and a cluster of small fans, and has many merits including reliability of operation, flexibility of mounting, maintainability, extremely low development costs and initial costs, and wide variety of potential applications. As a result of cycle analysis of the Cluster Fan Engine, it is confirmed that bypass ratio of the Cluster Fan Engine reaches to about 7. The small fan, which is one of the subunits of the Cluster Fan Engine, employs conceptually quit new tip turbine as driving mechanism to reduce weight and cost of the fan and avoid complexity. The tip turbine called "Single rotor blade row with multi stage tip turbine" has three stages in the circumferential direction of the turbine rotor. To ensure the practicality of the new tip turbine, a test model is designed and tested. The first operational test has been completed successfully, and the functionality of the new tip turbine was confirmed.
2005-01-20