The Turbine Components Development for the 100 kW Automotive Ceramic Gas Turbine

Based on the specifications of a 100 kW single shaft automotive CGT, the aerodynamic design and the basic structure design of the radial turbine components, and the detailed design of each part were carried out. When designing, attaching great importance to the problems (brittleness and difficulty in manufacturing) unique to ceramic materials is required. The life was estimated with a strength reliability designing tool.The aerodynamic characteristics were evaluated by testing metallic models, and the level of the intermediate target efficiency was achieved. The turbine rotor and the stationary structure parts were manufactured, and the strength reliability was evaluated with single and combined parts respectively. A peripheral speed of 830 m/s (113% of the rated value) with a turbine inlet temperature of 1200°C was obtained for the rotor hot-spin burst test.The aerodynamic characteristics and the strength reliability shall be improved by repeating trial manufacture and test evaluation of ceramic parts.Copyright © 1993 by ASME