Design and Evaluation of Silicon Nitride Turbocharger Rotors

Two types of silicon nitride ceramic rotor have been introduced into the Japanese market by Toyota Motor Corporation, named CT26 and CT12A, to improve engine acceleration response by the reduction in moment of inertia. In order to design a suitable blade shape for a ceramic rotor, the critical stres...

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Bibliographic Details
Published in:Journal of engineering for gas turbines and power 1993-01, Vol.115 (1), p.17-22
Main Authors: Takama, K, Sasaki, S, Shimizu, T, Kamiya, N
Format: Article
Language:English
Subjects:
330603 - Vehicle Design Factors- Engine System
ADVANCED PROPULSION SYSTEMS
Applied sciences
AUTOMOBILES
Ceramic materials
COMPRESSORS
DESIGN
Energy
Energy. Thermal use of fuels
Engines and turbines
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Evaluation
Exact sciences and technology
FABRICATION
Fracture
MACHINERY
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
ROTORS
SILICON COMPOUNDS
Silicon nitride
SILICON NITRIDES
Stresses
SUPERCHARGERS
TURBOCHARGERS
Turbomachine blader
TURBOMACHINERY
VEHICLES
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Description
Summary:Two types of silicon nitride ceramic rotor have been introduced into the Japanese market by Toyota Motor Corporation, named CT26 and CT12A, to improve engine acceleration response by the reduction in moment of inertia. In order to design a suitable blade shape for a ceramic rotor, the critical stress of the blade was determined by the results obtained experimentally from correlating the fracture origin over spintested rotors with centrifugal stress at fracture. A suitable blade shape has been determined for the CT26 turbocharger rotor type, which is identical to the metal rotor except for the disk diameter of hub back face and the blade thickness. The CT12A type is of similar design to the CT26 type; all dimensions could be reduced except for the inlet blade thickness, which is determined by foreign object damage (FOD) resistance.
ISSN:0742-4795
1528-8919
DOI:10.1115/1.2906675