DEVELOPMENT AND VALIDATION OF A LEAK DETECTION METHOD IN PIPES WITH A LEAK USING PRESSURE TRANSIENT DATA ASSIMILATION

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  • 圧力変動データ同化を利用した漏水1点に対応した管内漏水検知法の開発及び検証

Abstract

<p> In this study, a novel leak detection method for pipeline using pressure transient data assimilation with a numerical simulation incorporating a numerical scheme corresponding to a single leak point was developed. The accuracy of estimating the leak location and leakage volume for a single leak point was verified using this method. As a result, in both model pipeline experiments and field pipeline experiments, the estimated leak location error relative to the total length of the pipe was approximately less than 2%, and the leak volume error relative to the measured value was approximately less than 30%, indicating that this leak detection method has a practically feasible level of performance. Furthermore, the limitation of leak detection in terms of leak scale was determined to be approximately 1.70×10-5 and 2.73×10-3 times the pipe cross-sectional area in the model and field pipeline experiments, respectively, which corresponds to be significantly smaller than those reported in previous research, and at a similar level to them.</p>

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