Use of Pipeline Wave Propagation Model for Measuring Unsteady Flowrate

Reference:

Johnston, D. N. and Pan, M., 2010. Use of Pipeline Wave Propagation Model for Measuring Unsteady Flowrate. In: Fluid Power and Motion Control, 2010-09-15 - 2010-09-17, Bath.

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Abstract

A novel method for estimation of unsteady flowrate 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. Computer simulations show that the proposed method is effective for unsteady flowrate measurement to 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 comparison and analysis of two-transducer and three-transducer techniques are investigated through simulation. This method may be applied to real time flowrate measurement, control systems or active noise cancellation systems.

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