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مکانیک::
تنش حرارتی
The design of the high-pressure steam-cooled vanes embodies the closed loop approach to obtain optimum flow of the coolant, maintain the right pressure differential between steam and gas, and minimize thermal stress.
The enhanced features of the closed loop system control thermal stresses in the structure because of the steep temperature gradient.
Two other coun- termeasures permit further reduction in thermal stresses.
FIGURE 8.36 Thermal stress distribution Tg 1500C (Tsuchiya et al.
The temperature difference between the shroud and airfoil sec- tions results in the generation of thermal stresses that tend to be maximized at either the leading edge or the trailing edge on the inner surface of the outer shroud.
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