Journal article
Nonlinearities in ultrasonic flow measurement
The governing equations of flow acoustics including nonlinearities are solved and analyzed in terms of ultrasonic flow-measurement properties. The effect of nonlinearities for sound propagation is expected to be most significant for gas-flow measurement applications as gas-sound speeds are much smaller while fluid flows generally are much higher in the corresponding case of liquid-flow measurement applications.
The equation framework is applied to the case of a sinusoidal ultrasound transducer speed excitation at one location and detected by a receiver at another location. Flowmeter errors due to nonlinearities are highlighted in this work based on the well-known transit-time reciprocal transducer system setup.
It is found that accounting for nonlinear effects leads to, for a given flowmeter configuration and in a large flow range, an almost constant error which can be calibrated out in applications.
Language: | English |
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Year: | 2008 |
Pages: | 79-84 |
ISSN: | 18736998 and 09555986 |
Types: | Journal article |
DOI: | 10.1016/j.flowmeasinst.2007.09.004 |