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本文采用数值方法模拟了一个三孔探头周围与测压孔内的二维可压缩非定常流场，研究了动态效应对探头绕流和测孔压力的影响，以及相应的测量误差。结果显示，当流场高频振荡时（如： ２０００ Ｈｚ），其有效测量范围内的速度误差为 ２～４％，气流角误差约为 １０％之内。当流动接近失速时，该项误差迅速增大。文中还给出了高频振荡流中测压孔内外非定常与准定常流场分布之间的差异。
In this paper, a two-dimensional compressible unsteady flow field around a three-hole probe and a pressure-measuring hole is numerically simulated. The effect of dynamic effects on the flow around the probe and the pore-pressure measurement and corresponding measurement errors are studied. The results show that when the flow field is oscillating at high frequency (such as 2000 Hz), the velocity error in the effective measurement range is 2 ~ 4% and the error of the air flow angle is within about 10%. This error increases rapidly as the flow approaches stall. The paper also gives the difference between the unsteady and quasi-steady flow field distribution inside and outside the piezometer bore in high-frequency oscillating flow.