| 摘要 |
A turbine wheel for a hot gas turbine engine operable at relatively high temperatures, e.g. above 2,000 DEG F., and high velocities, e.g. above 30,000 r.p.m. The blades are formed of temperature-resistant ceramic material. A special annular band of high tensile strength material is affixed to tip areas of the blades for translating centrifugal forces into compressive loadings on the blades. To compensate for differential thermal expansion of the band relative to the blades a localized cooling system is provided for selectively cooling the annular band without cooling the blades.
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