Locating leakage in pipelines based on the adjoint equation of inversion modeling

Chang Chang; Xiangli Li; Lin Duanmu; Hongwei Li; Wenbin Zhou

doi:10.1016/j.heliyon.2023.e17270

Locating leakage in pipelines based on the adjoint equation of inversion modeling

Heliyon. 2023 Jun 14;9(6):e17270. doi: 10.1016/j.heliyon.2023.e17270. eCollection 2023 Jun.

Authors

Chang Chang¹, Xiangli Li¹, Lin Duanmu¹, Hongwei Li², Wenbin Zhou^{3

4}

Affiliations

¹ Institute of Building Environment and Facility Engineering, Dalian University of Technology, Dalian 116024, China.
² School of Energy and Power Engineering, Northeast Electric Power University, Jilin 132012, China.
³ School of Science and Engineering, University of Dundee, Dundee, DD1 4HN, UK.
⁴ Department of Mechanical Engineering, Imperial College London, London, SW7 2AZ, UK.

Abstract

This paper presents an adjoint method for locating potential leakage in a single-phase fluid pipeline based on the analytic solution of inversion modeling. By studying the mechanism of pipeline leakage pressure, the adjoint equation based on the governing equation of transient flow is established in the single-liquid phase aspect using inverse adjoint theory and sensitivity analysis method. The inverse transient adjoint equation is primarily derived from the single linear fluid pipeline in the semi-infinite domain. The Laplace method is then used to obtain an analytical solution that determines the location of pipeline leakage. The experimental results indicate that the analytic solution can quickly and accurately judge the leakage location of the pipeline. Furthermore, it presents a new approach to engineering applications, such as gas-liquid two-phase flow complex pipe networks, etc.

Keywords: Adjoint equation; Inversion modeling; Pipeline leakage; Sensitivity analysis.