中文摘要：

本文利用数值模拟方法在不同雷诺数、自由来流湍流度（FSTI）下对某高负荷低压涡轮叶型边界层转捩流动进行了数值模拟,并与实验测试结果进行了对比。结果表明：该转捩模型在不同的雷诺数和FSTI情况下均可以得到满意的数值计算结果,而仪仪利用湍流模型得不到合理的计算结果;当进口特征雷诺数较低时,叶型表面长分离泡的出现在很大范围内改变了壁面处的静压分布;随着自由来流湍流度的提高,叶型吸力面分离点的位置靠后且其对应的再附点位置靠前,即分离泡长度较短,高来流湍流度可以减小叶型吸力面的分离区域,减小叶型损失。而较低的自由流湍流度则在叶型尾缘对应着较长的分离泡,增大了流动分离再附的预测难度。

英文摘要：

Under different Re number as well as various FSTI situation,through numerical method to analyze high-loading LP turbine profile＇s boundary layer transition.All the numerical result compared with experimental result.Conclusion is：comparing with whole-turbulence numerical model,transition model used here can get satisfactory result both in different Re number and FSTI; when inlet Re number is low,the appearance of long separation bubble on the blade suction side changed static pressure a lot;with high inlet FSTI,the separation bubble＇s length reduced a lot, which can significantly reduced profile loss.But under low inlet FSTI,the length of the separation bubble increased moderately,which add difficult to predict boundary-layer separation＇s reattachment.