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The zero-flow performance of a sing-around ultrasonic flowmeter
Department of Heat and Power Engineering, Lund Institute of Technology.ORCID-id: 0000-0002-4133-3317
Antal upphovsmän: 11991 (Engelska)Ingår i: Flow Measurement and Instrumentation, ISSN 0955-5986, E-ISSN 1873-6998, Vol. 2, nr 4, s. 205-208Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Zero-flow performance was tested on a new sing-around flowmeter. Design considerations were made to correct for the influences of speed of sound and use was made of reciprocity. The meter was tested from 1 000 to 20 000 sing-around loops, the loop period being approximately 64 μs. To investigate averaging phenomena, 1-100 primary velocity values were averaged to form one value. The temperature range tested was 2-45°C, with measurements at 5°C intervals. The measurements show a zero-flow stability of better than ±0.6 mms-1 (± 1lh-1 for 25 mm diameter pipe) over the entire temperature range. The standard deviation at each temperature tested was less than 0.45 mm s-1. This implies that flow velocities as low as 6 cm s-1 (100 lh-1, 25 mm diameter pipe) could be measured with an accuracy of better than ±1%. The tests were made with water, but equivalent results are expected for other liquids as well as gases.

Ort, förlag, år, upplaga, sidor
1991. Vol. 2, nr 4, s. 205-208
Nationell ämneskategori
Annan elektroteknik och elektronik
Forskningsämne
Industriell elektronik
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URN: urn:nbn:se:ltu:diva-8968DOI: 10.1016/0955-5986(91)90002-9Lokalt ID: 7861e560-d870-11db-a1bf-000ea68e967bOAI: oai:DiVA.org:ltu-8968DiVA, id: diva2:981906
Anmärkning

Upprättat; 1991; 20070322 (pekkari)

Tillgänglig från: 2016-09-29 Skapad: 2016-09-29 Senast uppdaterad: 2017-11-24Bibliografiskt granskad

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