A remote measuring flow meter for petroleum and other industrial applications

The blown venturi flowmeter, based on a Coanda switched venturi resistance, has been investigated for use in petroleum and other industrial applications. It produces self-induced oscillations in the fluid at a frequency proportional to the rate of flow and the pressure waves are transmitted via the flowing fluid and detected downstream. Experimental work has been conducted by measuring the attenuation of the waves in airflow along a 28.5 m long, 0.05 m diameter pipe downstream of the flowmeter, ensuring that the remote metering concept was realized. Predictions of pressure pulse strength, pressure loss and frequency for the flowmeter in an oil production string have been made. Possible application of the meter to nuclear fuel reprocessing is suggested. (Original abstract - amended)