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Title: Ultrasonic Gas Flow Measurements In Reflection Mode In Underground Pipelines
Author: G.J. Broekgaarden, H. Lammerse
Source: 1986 International Symposium on Fluid Flow Measurement
Year Published: 1986
Abstract: A testprogram is carried out at the Gasunie laboratory to establish the capabilities of ultrasonic flowmeters to measure high pressure gas flow in underground pipelines. In this paper the background of the program is given and some problems related to ultrasonic flowmeters are discussed. Special attention is paid to the possibility of using different paths to determine the sonic pathlength and the degree of swirl. The latter capability gives the possibility to correct the measured flows for the effects of swirl. The results of the laboratory tests using a single path and tests using paths with one, two or even four reflections are given. In all these cases tests have been carried out in undisturbed as well as in disturbed flow. It appears that, although there are a lot of guestions still to be answered. ultrasonic flowmeters can be used in reflection mode in high pressure pipelines.

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