A novel method for estimation of unsteady flow rate using pressure at two or three points along a pipeline is described in this paper. The pressure data are processed using a wave propagation model to determine the unsteady flow. The comparison and analysis of two-transducer and three-transducer techniques are investigated through simulation. The proposed method is shown to be effective for unsteady flow rate measurement over a high bandwidth. However, if the pressure values from two transducers are used, inaccuracies exist at certain frequencies when the transducer spacing coincides with multiples of half a wavelength. The accuracy can be improved by adding a third transducer with unequal spacing. The three-transducer method has been implemented in experiments and has been found to be robust and reliable.
Use of Pipeline Wave Propagation Model for Measuring Unsteady Flow Rate
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received January 25, 2013; final manuscript received November 20, 2013; published online January 24, 2014. Assoc. Editor: Michael G. Olsen.
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Johnston, N., Pan, M., Kudzma, S., and Wang, P. (January 24, 2014). "Use of Pipeline Wave Propagation Model for Measuring Unsteady Flow Rate." ASME. J. Fluids Eng. March 2014; 136(3): 031203. https://doi.org/10.1115/1.4026106
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