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某发动机涡轮机匣的定位槽在使用中出现了裂纹,造成机匣整体报废。为找到裂纹的原因和有效的解决方法,开展涡轮流场的计算分析,在此基础上计算涡轮机匣的应力分布。计算结果证明热应力是裂纹的主要原因,为该涡轮机匣的改进提供了参考。
The positioning groove of an engine turbo cassette has a crack in use, resulting in the overall scrap of the receiver. In order to find out the cause of the crack and the effective solution, the calculation and analysis of turbine flow field are carried out. Based on this, the stress distribution of the turbine casing is calculated. The calculation results show that the thermal stress is the main reason for the crack, which provides a reference for the improvement of the turbine casing.