Reliability and Durability of Ceramic Regenerators in a Gas Turbine

[+] Author and Article Information
C. J. Rahnke, J. K. Vallance

Ford Motor Co., Turbine Engineering, Dearborn, Mich.

J. Eng. Power 100(1), 73-81 (Jan 01, 1978) (9 pages) doi:10.1115/1.3446329 History: Received December 20, 1976; Online July 14, 2010


The two major causes of failure of ceramic regenerators in a gas turbine engine are excessive thermal stress and chemical attack of the basic ceramic material. Data are presented which show that regenerator life can be correlated on the basis of rim thermal-stress safety factor. Durability gains can be achieved through improved mechanical design of the regenerator system, as well as through improved ceramic materials. The test results from almost 50,000 hr of gas turbine operation on several different candidate materials and design concepts are also presented. Two materials, aluminum silicate and magnesium aluminum silicate, show promise of achieving the durability goals required for automotive and industrial turbine applications.

Copyright © 1978 by ASME
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