Experimental study of a lock-in phenomenon in the case of a mechanical oscillator flowmeter

摘要

Oscillatory flowmeters are susceptible to pulsatile flow and mechanical oscillator flowmeters are no exception. The experimental study was conducted to determine possible measurement errors for specific pulsation amplitude thresholds. The study verified that no frequency lock-in takes place for pulsation frequencies which are subhar-monics of the natural oscillation frequency, nor for harmonics higher than the 2nd.