A New Development of the Theoretical and Experimental Treatment of the Lag of Dines Pressure Tube Exposed in Fluctuating Winds

抄録

The equation of motion of the float system in Dines pressure tube established first by S. IKEDA and corrected by the present author is compared with that given by SCHRENK for cupanemometer. The over-estimation factor of integrated record, under-estimation and phase-lag factor of peak indication are obtained by the graphical integration of the equation of motion for the pressure tube exposed in fluctuating winds, if the definition of SCHRENK'S parameter is extended to it. The effect of float inertia may safely be neglected. Experiments on the pressure tube, which is started from rest in the wind tunnel, or brought to rest in a still air, are conducted to determine the “SCHRENK'S parameter” for various piping conditions.