压力探针临壁效应的试验研究

在窄通道中测量时（如全台压气机试验），临壁效应会使压力探针的测量结果发生误差。对几种常用型式的压力探针的试验研究表明，由于探针多属非流线形物体，所以其临壁效应的机理与流线形的机翼不同，不应简单套用机翼临壁效应的结论。临壁效应所造成的测量误差与探针的形状有关。

WALL PROXIMITY EFFECTS ON MEASURING ACCURACY OF PRESSURE PROBE

Pressure probes applied to measurements in narrow channel are sure to make measuring errors due to their wall proximity.Since the contour of the pressure probes is not streamline,their wall proximity effects can not be copied indiscriminately after those of the wing.The wall proximity effects of the pressure probes must be dependent on their contour,technological factors and Reynolds number Re d .As two examples,the three-hole cylindrical probe and the three-tube probe had been investigated experimentally.The Error-L relations are shown in Fig.3 to 9.