Leak detection and calibration of transient hydraulic system models / Calibração e detecção de vazamentos em modelos de sistemas hidráulicos no escoamento transitório
AUTOR(ES)
Alexandre Kepler Soares
DATA DE PUBLICAÇÃO
2007
RESUMO
The occurrence of large leakage losses in water supply systems has been frequently linked with pipe breaks resulting from high pressures levels in pipes. Efficient location of leakages is required in order to effectively control water losses and quickly repair the system. Analysis of hydraulic transients has been particularly useful for calibration and leak detection purposes. System observation for such analysis can reveal a substantial amount of information concerning physical properties and the integrity of the system, since water hammer waves are affected by different features and phenomena, including leaks. Thus, this research focuses on hydraulic transients for leak detection and calibration of water distribution system models. These objectives are achieved using data obtained from experiments performed on an experimental facility and numerical experiments on hypothetical networks. Inverse methods were based on both global and local search methods. Classic water hammer theory proved to be imprecise in describing the observed behavior of the hydraulic system composed of plastic pipes. Satisfactorily results were obtained with a hydraulic transient solver considering viscoelastic behavior of the pipe material.
ASSUNTO(S)
transitórios hidráulicos viscoelasticidade calibração calibration detecção de vazamentos leak detection hydraulic transients viscoelasticity
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