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A new velocity algorithm for sing-around-type flow meters
1987 (English)In: IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, ISSN 0885-3010, E-ISSN 1525-8955, Vol. 34, no 4, 431-436 p.Article in journal (Refereed) Published
Abstract [en]

In many flow metering applications the fluid temperature can change rapidly during the measurements. An example is flow metering in district heating systems. These temperature changes will cause fast, large changes of the speed of sound in the fluid. If not recognized, this phenomenon can introduce severe errors in sing-around-type flow meters. The sing-around flow meters used today handle this problem with varying success. Therefore, the algorithm used to calculate the flow velocity from the sing-around frequencies has be modified. This new algorithm compensates for fast changes of fluid temperature during the sing-around measurement cycle. A complete derivatin is given for both laminar and turbulent flow. Test measurements comparing the new algorithm and the conventional one showed a superior performance of the new algorithm, especially in the case of rapidly changing fluid temperature.

Place, publisher, year, edition, pages
1987. Vol. 34, no 4, 431-436 p.
Research subject
Industrial Electronics
URN: urn:nbn:se:ltu:diva-5312DOI: 10.1109/T-UFFC.1987.26963Local ID: 35f748d0-d7e6-11db-a1bf-000ea68e967bOAI: diva2:978186
Uppr├Ąttat; 1987; 20070321 (ysko)Available from: 2016-09-29 Created: 2016-09-29

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