使用CFX软件对超高负荷低压涡轮叶型吸力面的非定常转捩过程进行数值模拟，并利用试验数据对其结果进行了验证。考察了不同雷诺数(Re＝80000、100000)对附面层流动发展的影响，并通过附面层流场细节分析，得出了雷诺数对分离、转捩的作用，证实高雷诺数下转捩的发生更靠近上游，使得分离减弱、损失减小。同时，借助频谱分析方法，证明雷诺数不同不会改变Kelvin-Helmholtz和Tollmien-Schlichting不稳定性对转捩的影响。%The unsteady transition process of a low pressure turbine with ultra-high loading was investigat⁃ed by using CFX software. The numerical simulation results were also validated with the experimental data. The effects of different Reynolds number (Re=80 000、Re=100 000) on the boundary layer development were researched. Through the flow field analysis, it was found that the higher Re would lead an earlier tran⁃sition, weaken the separation bubble and reduce the profile loss. The spectrum analyzing method was also used, and the results proved that the Kelvin-Helmholtz instability and Tollmien-Schlichting instability were not influenced by the Re in the transition process.
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