Abstract

In order to determine the momentary flow mode existing in an oil-gas pipe, it is important to know the spatial distribution of the dispersed phase. To measure this quantity, non-intrusive methods such as ultrasonic tomography are used. Ultrasonic tomography is based on the numeric reconstruction of cross sectional images from their projections, which can be determined both from ultrasonic transmission and reflection measurements. In order to realize very fast projection measurements from different directions, a large number of transducers must be coupled to the pipe.1 The number of transducers has to be chosen as a compromise between spatial and time resolution.

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