EFFECT OF KINEMATIC VISCOSITY ON PERFORMANCE OF TURBINE FLOWMETERS--SOLUTION TO THE PROBLEM

摘要

The kinematic viscosity, v, of liquids very significantly affects the performance of turbine flowmeters used to measure the flow of liquids. In this paper, the effect of v on turbine flowmeter performance is investigated in order to correct for v. A previously-published "linearization" procedure is first used to determine the linear region of performance of turbine flowmeters. The v-dependence is then assigned to the parameters a and b in the linear equation relating pulse frequency to volume flow rate. Calibration data for three turbine flowmeters are used to illustrate the analysis. For all three of the flowmeters, a was linear with v. For the two flowmeters of the same manufacturer, b was linear with 1/v; for the other flowmeter, b was linear with v. The procedures are shown to very satisfactorily solve the v-dependence problem.