The Measurement of Fluctuations of Air Speed by the Hot-Wire Anemometer (1930)
NASA Technical Reports Server (NTRS) · leaf 13
hot wire. If in an ampli- fier we can pass on to the succeeding stage the voltage variation in Figure 3.—Graphical method of cor- a circuit with this time constant, the amplitude can be restored, recting for lag and an advancement of phase made to compensate for the lag of the wire. The development… … Figure i.- General view of apparatus mental test of its action. The compensation can not be made perfect as is obvious from the limiting case of high-frequency variations of air speed where the change of resistance of the wire approaches zero. We can not expect to get a positive result from a zero…
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