The Measurement of Fluctuations of Air Speed by the Hot-Wire Anemometer (1930)
NASA Technical Reports Server (NTRS) · leaf 24
uation. F„=mean speed at center of working section but even more troublesome. In spite of calibrations two and four times per day and of numerous returns to a reference point during a traverse, it was difficult to secure an accuracy of better than ± 1.5 per cent in the mean speed. Some of the… … speed. In the boundary layer the fluctuations y.mm Figure 17.—Distribution of the double amplitude of the speed fluctua- increase to a flat maximum at about 15 mm tions at three sections, expressed as ratios to the local mean speed. from the wall and then decrease as the wall is y=distance from…
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