Understanding Thermo-Mechanical Fatigue

Press/Media: Research


Turbine housings have a difficult life. The exhaust gases passing through them may be over 700°C, whereas the surrounding air is only around 90°C giving a thermal gradient across the turbine housing walls. However, at low engine powers, the exhaust gas is much cooler giving a temperature range of 600°C during some duty cycles. It is this cycling of exhaust temperature that incurs stresses in the turbine housing, which must be carefully considered at the design stage.

Period1 Jan 2007

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