Development of a novel flow metering system using ultrasonic velocity profile measurement |
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Authors: | M Mori Y Takeda T Taishi N Furuichi M Aritomi H Kikura |
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Institution: | (1) Tokyo Electric Power Company, Tsurumi-ku, Yokohama 223 Japan, JP;(2) Tokyo Institute of Technology, 2-12-1 Ohokayama Meguro-ku, Tokyo 152, Japan e-mail: Yasushi.Takeda@psi.ch, JP |
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Abstract: | A new flow metering system using an ultrasonic Doppler method has been developed. By this method, an instantaneous velocity
profile is measured and its integral is evaluated to give flow rate. Instead of making multidimensional flow mapping to evaluate
its performance, the method was assessed in laboratory experiments where single line measurements were used over the whole
pipe diameter or radius to determine the flow rate. The system shows a good capability of tracking transient flows. Its accuracy
was investigated using the National Institute of Standards and Technology (NIST) flow standards in Gaithersburg, MD, USA;
averaged results show its deviation from NIST results to be 0.18% for Re=400 K and 0.58% for Re=2.6 M. Good repeatability and reproducibility were also confirmed.
Received: 28 April 2000/Accepted: 1 November 2000 Published online: 29 November 2001 |
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