1965-02-01

DESIGN PROCEDURES FOR IMPROVING ENGINE OPERATING COSTS 650211

Some design techniques for low gas turbine engine operating costs are discussed. These techniques are developed to insure long life of major operating components without sacrifice of low weight, high efficiency or operational requirements of the machine. The principle areas covered are new methods to reduce susceptibility to low cycle fatigue, avoid thermal fatigue and reduce susceptibility of turbine hardware to thermal shock.
Effects of foreign object damage, mishandling of hardware, and manufacturing variations are discussed with attention given to reducing the ill effects caused by these items. Recognitions of and design for repair requirements are discussed as one method to appreciably reduce replacement costs for engine components.
It is concluded that although the performance requirements are more stringent, the operating environment is more severe and weight requirements are more stringent, the engine designer can hold parts operating cost down.

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