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“Ｘ”型热线测量了离散气膜孔下游边界层内的湍流量，将热线探头绕轴转三个角方位以感受三维湍流场信息。结果表明，边界层内湍动能分布呈反“Ｓ”形，吹风比和孔排数对参数分布有重要影响，这种影响在很长距离上不消失，所以，常用的ｋ－ε模型不经修正不能正确预计这类边界层的发展。
The “X” hotline measures the amount of turbulent flow in the boundary layer downstream of the discrete film hole. The hot wire probe is rotated around the three corners to sense 3D turbulence field information. The results show that the turbulent kinetic energy distribution in the boundary layer shows an inverted “S” shape, and the blowing ratio and the number of rows of holes have an important influence on the parameter distribution. This effect does not disappear over a long distance. Therefore, the commonly used k- Amendments can not correctly predict the development of such boundary layers.