Abstract
This report concerns the problem of pulsation error in the measurement of pulsating flow at high Reynolds numbers by making use of float-type flowmeter. The motion of the float is discussed theoretically on the basis of equation of motion taking into account the extra pressure due to unsteadiness of the flow. The effect of the extra pressure on the pulsation error is examined by making comparison of the present solution with previous one in which the extra pressure was neglected.Following points may be noted:1) Pulsation error is more or less reduced by the effect of unsteady extra pressure.2) The results for the pulsation error obtained in a previous paper1) are valid only for the case of low pulsation frequency or the case of small scale factor of the extra pressure effect (flow of gas in particular).
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