Reducing Thermal Stress in Turbine Cylinders Subjected to Cyclic Service

[+] Author and Article Information
Walter Sinton

Large and Medium Turbine Apparatus Section, Steam Division, Westinghouse Electric Corporation, Lester, Pa.

R. E. Warner

Large and Medium Turbine Mechanical Section, Steam Division, Westinghouse Electric Corporation, Lester, Pa.

J. Eng. Power 84(4), 389-402 (Oct 01, 1962) (14 pages) doi:10.1115/1.3675059 History: Received July 28, 1961; Online January 10, 2012


The current problem of cracked cylinders encountered on steam turbines subjected to cyclic service points up the need for a better understanding of the thermal stresses which cause the difficulty, and for techniques to minimize and control these stresses. This paper establishes an improved approach to operation based on applying instrumentation to monitor and limit temperature gradients to recommended values. Benefits of heating manifolds are discussed. The advantage inherent in flexible inlet features has been incorporated into current cylinder designs for units operating in the range of 850 to 950 F inlet temperature.

Copyright © 1962 by ASME
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