Effects of Temperature Distribution and Elastic Properties of Materials on Gas-Turbine-Disk Stresses

摘要

Severe temperature gradients caused thermal stresses of sufficient magnitude to reduce the operating safety of the turbine disk. Small temperature gradients were desirable because they created thermal stresses that subtracted from the centrifugal stresses in the region of the rim. Investigation of elastic material properties showed that centrifugal stresses are slightly affected by changes in modulus of elasticity; but that thermal stresses are approximately proportional to modulus of elasticity and to coefficient of thermal expansion.