Measuring vibration of a fluid stream to determine gas fraction
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United States of America Patent
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Jun 11, 1996
Grant Date -
N/A
app pub date -
Nov 10, 1994
filing date -
Nov 10, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
Multiphase fluid flowstreams may be analyzed to determine to gas fraction of the fluid by defining a zone in a conduit in which the fluid flowstream is caused to vibrate either laterally or longitudinally at a resonant frequency of vibration of the fluid flowstream using a transducer or by causing the fluid to flow through an orifice in the conduit. A vibrating zone within the conduit is delimited by spaced apart ports in the conduit and/or spaced apart grilles which reflect the longitudinal vibrations. Lateral vibrations may be enhanced by causing the flowstream to flow through a rectangular passage in the conduit. Spectral analysis of the vibrating flowstream identifies the resonant frequency of vibration which, together with pressure and temperature measurements may be used in calculating the gas fraction.
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